MONESSEN Fortress See-Through Gas Outdoor Fireplace Installation guide

1

Outdoor Lifestyles by Hearth & Home Technologies • Fortress - ODFORTG-36 Installation Manual • 4602-901 Rev G • 11/19

Installation Manual

Installation and Appliance Setup

INSTALLER: Leave this manual with party responsible for use and operation.

OWNER: Retain this manual for future reference.

NOTICE: DO NOT discard this manual!

In the Commonwealth of Massachusetts installation must be

performed by a licensed plumber or gas tter.

See Table of Contents for location of additional Commonwealth

of Massachusetts requirements.

• DO NOT store or use gasoline or other am-

mable vapors and liquids in the vicinity of this

or any other appliance.

• What to do if you smell gas

- DO NOT try to light any appliance.

- DO NOT touch any electrical switch. DO

NOT use any phone in your building.

- Leave the building immediately.

- Immediately call your gas supplier from

a neighbor’s phone. Follow the gas sup-

plier’s instructions.

- If you cannot reach your gas supplier, call

the re department.

• Installation and service must be performed

by a qualied installer, service agency, or the

gas supplier.

WARNING:

FIRE OR EXPLOSION HAZARD

Failure to follow safety warnings exactly

could result in serious injury, death, or

property damage.

This appliance may be installed as an OEM

installation in manufactured home (USA

only) or mobile home and must be installed

in accordance with the manufacturer’s

instructions and the Manufactured Home

Construction and Safety Standard, Title 24

CFR, Part 3280 in the United States, or the

Standard for Installation in Mobile Homes,

CAN/CSA Z240 MH Series, in Canada.

This appliance is only for use with the type(s)

of gas indicated on the rating plate. This

appliance is not convertible for use with other

gases, unless a certied kit is used.

DANGER

HOT GLASS WILL

CAUSE BURNS.

DO NOT TOUCH GLASS

UNTIL COOLED.

NEVER ALLOW CHILDREN

TO TOUCH GLASS.

A barrier designed to reduce the risk of

burns from the hot viewing glass is provided

with this appliance and shall be installed for

the protection of children and other at-risk

individuals.

Models: ODFORTG-36

FORTRESS

SERIES

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Outdoor Lifestyles by Hearth & Home Technologies • Fortress - ODFORTG-36 Installation Manual • 4602-901 Rev G • 11/19

Safety Alert Key:

• DANGER! Indicates a hazardous situation which, if not avoided will result in death or serious injury.

• WARNING! Indicates a hazardous situation which, if not avoided could result in death or serious injury.

• CAUTION! Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.

• NOTICE: Used to address practices not related to personal injury.

Table of Contents

Installation Standard Work Checklist ....................3

1 Product Specic and Important Safety Information

A. Appliance Certication ............................4

B. Glass Specications ..............................4

C. BTU Specications ...............................4

D. High Altitude Installations .......................... 4

E. Non-Combustible Materials Specication. . . . . . . . . . . . . . 4

F. Combustible Materials Specication .................4

G. Electrical Codes .................................4

H. Requirements for the Commonwealth of Massachusetts . . 5

2 Getting Started

A. Design and Installation Considerations ...............6

B. Good Faith Wall Surface/TV Guidelines ..............6

C. Tools and Supplies Needed ........................6

D. Inspect Appliance and Components ..................7

3 Framing and Clearances

A. Appliance/Decorative Front Dimension Diagrams ....... 8

B. Clearances to Combustibles. .......................9

C. Mantel Combustibles. .............................9

D. Constructing the Appliance Chase .................. 10

E. Hearth Extension ............................... 11

4 Termination Location and Vent Information

A. Vent Termination Minimum Clearances .............. 12

B. Chimney Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

C. Approved Pipe .................................14

D. Use of Elbows .................................15

E. Measuring Standards ............................16

F. Vent Diagrams ................................. 16

5 Venting Installation

A. Installation Precautions ...........................17

B. Installation Planning .............................18

C. Installation Instructions ........................... 18

6 Appliance Preparation

A. Securing and Leveling the Appliance ................25

7 Venting and Chimneys

A. Assemble Vent Sections .........................26

B. Assemble Slip Sections ..........................27

C. Secure the Vent Sections .........................27

D. Disassemble Vent Sections .......................28

E. Vertical Termination Requirements ..................28

F. Horizontal Termination Requirements ............... 30

8 Electrical Information

A. General Information .............................31

B. Wiring Requirements ............................32

9 Gas Information

A. Fuel Conversion ................................33

B. Gas Pressure ..................................33

C. Gas Connection ................................33

D. High Altitude Installations ......................... 33

10 Finishing - Final Installation

A. Facing Material .................................34

B. Installation Instructions for Outdoor Side .............34

C. Log Placement Instructions .......................40

11 Reference Materials

A. Vent Components Diagrams ......................43

B. Accessories ...................................50

 = Contains updated information.

►

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Outdoor Lifestyles by Hearth & Home Technologies • Fortress - ODFORTG-36 Installation Manual • 4602-901 Rev G • 11/19

Installation Standard Work Checklist

Customer:

Lot/Address:

Model (circle one): ODFORTG-36

Date Installed:

Location of Fireplace:

Installer:

Dealer/Distributor Phone #

Serial #:

Comments Communicated to party responsible ____________________ by ______________________on ___________

(Builder / Gen. Contractor/) (Installer) (Date)

 = Contains updated information.

Hearth & Home Technologies recommends the following:

• Photographing the installation and copying this checklist for your le.

• That this checklist remain visible at all times on the appliance until the installation is complete.

This standard work checklist is to be used by the installer in conjunction with, not instead of, the instructions contained in

this installation manual.

WARNING! Risk of Fire or Explosion! Failure to install appliance according to these instructions can lead to a

re or explosion.

ATTENTION INSTALLER:

Follow this Standard Work Checklist

Appliance Install Information YES IF NO, WHY?

Veried clearances to combustibles requirements are maintained. (Pg. 9-10) ___________________

Veried that the chase is insulated and sealed. (Pg. 9) ___________________

Veried mantel and wall clearance requirements are maintained. (Pg. 9) ___________________

Veried hearth extension requirements are maintained. (Pg. 11) __________________

Veried appliance is leveled and secured. (Pg. 25) ___________________

Venting/Chimney Section 7 (Pg. 26-30)

Veried venting conguration complies to vent diagrams. ___________________

Veried venting installed, locked and sealed/secured in place. ___________________

Veried venting meets clearance to combustible requirements. ___________________

Veried wall/ceiling restops are installed (if applicable). ___________________

Veried attic insulation shield is installed (if applicable). ___________________

Veried Exterior wall/Roof ashing is installed and sealed. ___________________

Veried termination cap is installed and sealed. ___________________

Electrical Section 8 (Pg. 31-32)

Veried unswitched power (110-120 VAC) provided to the appliance. ___________________

Veried wall switch wires are properly installed (if applicable). ___________________

Gas Section 9 (Pg. 33)

Veried appliance is using proper fuel type. ___________________

If converted, veried proper fuel conversion kit was used. ___________________

Veried that gas components (ttings, pressure taps, etc) are leak free and replace is

operating under correct pressures. ___________________

Finishing Section 10 (Pg. 34-40)

Veried that nish material does not interfere with install/operation of decorative front. ___________________

Veried combustible materials are not installed in non-combustible areas. ___________________

Veried all clearances meet installation manual requirements. ___________________

Veried mantels/wall projections comply with installation manual requirements. ___________________

Veried all packaging and protective materials are removed (inside & outside of appliance). ___________________

Veried Glowing Embers and logs installed correctly. ___________________

Veried xed glass assembly installed and secured. ___________________

Veried remote control has been programmed and is fully functional. ___________________

Veried proper air shutter setting for installation type and vent conguration. ___________________

Manual bag and all of its contents are removed from inside/under

the appliance and given to party responsible for use and operation. ___________________

4602-902 12/16

Comments: Further description of the issues, who is responsible (Installer/ Builder/ Other Trades, etc) and corrective

action needed ____________________________________________________________________________________

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Outdoor Lifestyles by Hearth & Home Technologies • Fortress - ODFORTG-36 Installation Manual • 4602-901 Rev G • 11/19

B. Glass Specications

This appliance is equipped with ceramic glass that is

used on the inside glass door frames attached to the

rebox. Replace glass only with ceramic glass. The out-

door glass in the black frame screwed to the Stainless

Steel frame is tempered glass. Replace with tempered

glass. Please contact your dealer for replacement glass.

This product is listed to ANSI standards for “Vented Gas

Fireplace Heaters” and applicable sections of “Gas Burn-

ing Heating Appliances for Manufactured Homes and

Recreational Vehicles”, and “Gas Fired Appliances for

Use at High Altitudes”.

A. Appliance Certication

D. High Altitude Installations

NOTICE: If the heating value of the gas has been reduced,

these rules do not apply. Check with your local gas utility

or authorities having jurisdiction.

When installing above 2000 feet elevation:

• In the USA: Reduce input rate 4% for each 1000 feet

above 2000 feet.

• In CANADA: Input ratings are certied without a reduc-

tion of input rate for elevations up to 4500 feet (1370

m) above sea level. Please consult provincial and/or

local authorities having jurisdiction for installations

at elevations above 4500 feet (1370 m).

Check with your local gas utility to determine proper ori-

ce size.

E. Non-Combustible Materials Specication

Material which will not ignite and burn. Such materials are

those consisting entirely of steel, iron, brick, tile, concrete,

slate, glass or plasters, or any combination thereof.

Materials that are reported as passing ASTM E 136,

Standard Test Method for Behavior of Materials in

a Vertical Tube Furnace at 750 ºC shall be considered

non-combustible materials.

F. Combustible Materials Specication

Materials made of or surfaced with wood, compressed pa-

per, plant bers, plastics, or other material that can ignite

and burn, whether ame proofed or not, or plastered or

unplastered shall be considered combustible materials.

G. Electrical Codes

NOTICE: This appliance must be electrically wired

and grounded in accordance with local codes or, in the

absence of local codes, with National Electric Code

ANSI/NFPA 70-latest edition or the Canadian Electric

Code CSA C22.1.

• A 110-120 VAC circuit for this product must be pro-

tected with ground-fault circuit-interrupter protection,

in compliance with the applicable electrical codes,

when it is installed in locations such as in bathrooms

or near sinks.

NOT INTENDED FOR USE AS A PRIMARY HEAT SOURCE.

This appliance is tested and approved as either supplemen-

tal room heat or as a decorative appliance. It should not be

factored as primary heat in residential heating calculations.

NOTICE: This installation must conform with local codes.

In the absence of local codes you must comply with the

National Fuel Gas Code, ANSI Z223.1-latest edition in

the U.S.A. and the CAN/CGA B149 Installation Codes in

Canada.

1

Product Specic and Important Safety Information

MODELS: ODFORTG-36

LABORATORY: CSA

TYPE: Direct Vent Heater

STANDARD: ANSI-Z21.88-2014 • CSA 2.33-2014

C. BTU Specications

Models

(U.S. or Canada)

Maximum

Input

BTU/h

Minimum

Input

BTU/h

Middle

Orice

Size

(DMS)

Outer

Orice

Size

(DMS)

ODFORTG-36 (NG)

US

(0-4500FT)

56,000 38,000 #31 #46

ODFORTG-36 (LP)

US

(0-4500 FT)

56,000 44,000 #50 #56

WARNING: This product and the

fuels used to operate this product (liquid

propane or natural gas), and the products

of combustion of such fuels, can expose

you to chemicals including benzene, which

is known to the State of California to cause

cancer and reproductive harm. For more

information go to: www.P65Warnings.

ca.gov.

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Outdoor Lifestyles by Hearth & Home Technologies • Fortress - ODFORTG-36 Installation Manual • 4602-901 Rev G • 11/19

H. Requirements for the Commonwealth of

Massachusetts

For all side wall horizontally vented gas fueled equipment

installed in every dwelling, building or structure used in

whole or in part for residential purposes, including those

owned or operated by the Commonwealth and where the

side wall exhaust vent termination is less than seven (7)

feet above nished grade in the area of the venting, in-

cluding but not limited to decks and porches, the following

requirements shall be satised:

Installation of Carbon Monoxide Detectors

At the time of installation of the side wall horizontal vented

gas fueled equipment, the installing plumber or gas tter

shall observe that a hard wired carbon monoxide detector

with an alarm and battery back-up is installed on the oor

level where the gas equipment is to be installed. In addi-

tion, the installing plumber or gas tter shall observe that

a battery operated or hard wired carbon monoxide detec-

tor with an alarm is installed on each additional level of

the dwelling, building or structure served by the side wall

horizontal vented gas fueled equipment. It shall be the

responsibility of the property owner to secure the services

of qualied licensed professionals for the installation of

hard wired carbon monoxide detectors.

In the event that the side wall horizontally vented gas fu-

eled equipment is installed in a crawl space or an attic,

the hard wired carbon monoxide detector with alarm and

battery back-up may be installed on the next adjacent

oor level.

In the event that the requirements of this subdivision can

not be met at the time of completion of installation, the

owner shall have a period of thirty (30) days to comply

with the above requirements; provided, however, that dur-

ing said thirty (30) day period, a battery operated carbon

monoxide detector with an alarm shall be installed.

Approved Carbon Monoxide Detectors

Each carbon monoxide detector as required in accor-

dance with the above provisions shall comply with NFPA

720 and be ANSI/UL 2034 listed and IAS certied.

Signage

A metal or plastic identication plate shall be permanent-

ly mounted to the exterior of the building at a minimum

height of eight (8) feet above grade directly in line with the

exhaust vent terminal for the horizontally vented gas fu-

eled heating appliance or equipment. The sign shall read,

in print size no less than one-half (1/2) in. in size, “GAS

VENT DIRECTLY BELOW. KEEP CLEAR OF ALL OB-

STRUCTIONS”.

Inspection

The state or local gas inspector of the side wall horizon-

tally vented gas fueled equipment shall not approve the

installation unless, upon inspection, the inspector ob-

serves carbon monoxide detectors and signage installed

in accordance with the provisions of 248 CMR 5.08(2)(a)1

through 4.

Exemptions

The following equipment is exempt from 248 CMR 5.08(2)

(a)1 through 4:

• The equipment listed in Chapter 10 entitled “Equipment

Not Required To Be Vented” in the most current edition

of NFPA 54 as adopted by the Board; and

• Product Approved side wall horizontally vented gas fu-

eled equipment installed in a room or structure separate

from the dwelling, building or structure used in whole or

in part for residential purposes.

MANUFACTURER REQUIREMENTS

Gas Equipment Venting System Provided

When the manufacturer of Product Approved side wall

horizontally vented gas equipment provides a venting

system design or venting system components with the

equipment, the instructions provided by the manufacturer

for installation of the equipment and the venting system

shall include:

• Detailed instructions for the installation of the venting

system design or the venting system components; and

• A complete parts list for the venting system design or

venting system.

Gas Equipment Venting System NOT Provided

When the manufacturer of a Product Approved side wall

horizontally vented gas fueled equipment does not pro-

vide the parts for venting the ue gases, but identies

“special venting systems”, the following requirements

shall be satised by the manufacturer:

• The referenced “special venting system” instructions

shall be included with the appliance or equipment in-

stallation instructions; and

• The “special venting systems” shall be Product Ap-

proved by the Board, and the instructions for that sys-

tem shall include a parts list and detailed installation

instructions.

A copy of all installation instructions for all Product Ap-

proved side wall horizontally vented gas fueled equip-

ment, all venting instructions, all parts lists for venting

instructions, and/or all venting design instructions shall

remain with the appliance or equipment at the completion

of the installation.

See Gas Connection section for additional Common-

wealth of Massachusetts requirements.

Note: The following requirements reference various

Massachusetts and national codes not contained in this

document.

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Outdoor Lifestyles by Hearth & Home Technologies • Fortress - ODFORTG-36 Installation Manual • 4602-901 Rev G • 11/19

2

Getting Started

A. Design and Installation Considerations

Outdoor Lifestyles direct vent gas appliances are de-

signed to operate with all combustion air siphoned from

outside of the building and all exhaust gases expelled to

the outside. No additional outside air source is required.

Installation MUST comply with local, regional, state and

national codes and regulations. Consult insurance carrier,

local building inspector, re ofcials or authorities having

jurisdiction over restrictions, installation inspection and

permits.

Before installing, determine the following:

• Where the appliance is to be installed.

• The vent system conguration to be used.

• Gas supply piping requirements.

• Electrical wiring requirements.

• Framing and nishing details.

• Whether optional accessories—devices such a wall

switch or remote control—are desired.

C. Tools and Supplies Needed

Before beginning the installation be sure that the following

tools and building supplies are available.

Tape measure Framing material

Pliers Hammer

Phillips screwdriver Manometer

Gloves Framing square

Voltmeter Electric drill and bits (1/4 in.)

Plumb line Safety glasses

Level Reciprocating saw

Flat blade screwdriver

Non-corrosive leak check solution

1/2 - 3/4 in. length, #6 or #8 Self-drilling screws

Caulking material (300 ºF minimum continuous exposure

rating)

One 1/4 in. female connection (for optional fan).

Improper installation, adjustment, alteration, service or

maintenance can cause injury or property damage. For

assistance or additional information, consult a qualied

service technician, service agency or your dealer.

Figure 2.1 Good Faith Wall Surface Temperatures Above Appliance

B. Good Faith Wall Surface/TV Guidelines

NOTICE: Temperatures listed above are taken with a

temperature measuring probe as prescribed by the test

standard used for appliance certication. Temperatures

on walls or mantels taken with an infrared thermometer

may yield increased temperatures of up to 30 degrees or

more depending on the thermometer settings and material

characteristics being measured.

MEASUREMENTS FROM

TOP EDGE OF THE OPENING

6 in.

18 in.

24 in.

30 in.

36 in.

TO CEILING

12 in.

APPLIANCE FRONT

FIREPLACE

OPENING

157 °F

129 °F

124 °F

123 °F

116 °F

105 °F

Installation and service of this appliance should be performed by

qualied personnel. Hearth & Home Technologies recommends

HHT Factory Trained or NFI certied professionals.

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Outdoor Lifestyles by Hearth & Home Technologies • Fortress - ODFORTG-36 Installation Manual • 4602-901 Rev G • 11/19

D. Inspect Appliance and Components

• Carefully remove the appliance and components from

the packaging.

• The vent system components may be shipped in

separate packages.

• If packaged separately, the log set and appliance grate

must be installed.

• Report to your dealer any parts damaged in shipment,

particularly the condition of the glass.

• Read all of the instructions before starting the instal-

lation. Follow these instructions carefully during the

installation to ensure maximum safety and benet.

WARNING! Risk of Fire or Explosion! Damaged parts

could impair safe operation. DO NOT install damaged, in-

complete or substitute components. Keep appliance dry.

Hearth & Home Technologies disclaims any responsibility

for, and the warranty will be voided by, the following actions:

• Installation and use of any damaged appliance or vent

system component.

• Modication of the appliance or vent system.

• Installation other than as instructed by Hearth & Home

Technologies.

• Improper positioning of the gas logs or the glass door.

• Installation and/or use of any component part not approved

by Hearth & Home Technologies.

Any such action may cause a re hazard.

WARNING! Risk of Fire, Explosion or Electric Shock!

DO NOT use this appliance if any part has been under

water. Call a qualied service technician to inspect the

appliance and to replace any part of the control system

and/or gas control which has been under water.

8

Outdoor Lifestyles by Hearth & Home Technologies • Fortress - ODFORTG-36 Installation Manual • 4602-901 Rev G • 11/19

3

Framing and Clearances

A. Appliance/Decorative Front Dimension Diagrams

Dimensions are actual appliance dimensions. Use for reference only. For framing dimensions and clearances refer to Section 5.

Figure 3.1 Appliance Dimensions

Location Inches Millimeters

G 7-3/8 187

H 9 228

I 12 305

J 23-13/16 605

K 24 609

L 25-5/8 650

Location Inches Millimeters

A 471/2 1207

B 39-3/8 1000

C 34-1/4 869

D 38-1/4 978

E 49-3/8 1254

F 44-3/8 1128

J

I

E

F

D

C

K

L

B

A

H

G

Outdoor Side

Indoor Side

Outdoor Side

Indoor Side

Appliance Dimensions Table

►

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Outdoor Lifestyles by Hearth & Home Technologies • Fortress - ODFORTG-36 Installation Manual • 4602-901 Rev G • 11/19

B. Clearances to Combustibles.

Fire Risk.

Follow these instructions carefully to ensure safe

installation. Failure to follow instructions exactly

can create a re hazard.

WARNING

The appliance cannot be installed on a carpet, tile or

other combustible material other than wood ooring. If

installed on carpet or vinyl ooring, the appliance shall

be installed on a metal, wood or noncombustible material

panel extending full width and depth of the appliance.

72 in.

(1829 mm)

Min.

Ceiling

12 in.

(305 mm)

Max. Depth

16 in.

(406 mm)

Min.

6 in.

(

152 mm)

Min.

Hearth 8 in. Min.

(203 mm)

Noncombustible

Hearth Minimum

Fireplace Opening

Combustible Mantel

Figure 3.2. Ceiling and Side Wall Clearance

C. Mantel Combustibles.

NOTE: The combustible area above the facing must not

protrude more than 1/2" from the facing. If it does, it is

considered a mantel and must meet the mantel require-

ments listed in this manual.

45°

1 in.

4 in.

Stud

Finish Wall

Combustible

Material Area

Top View

5 in.

6 in.

2 in.

3 in.

16 in.

12 in.

10 in.

12 in.

6 in.

2-1/2

in.

Side View

Noncombustible

Material to Top of

Standoffs

Top of Fireplace

Opening

Figure 3.3. Mantel Clearance

Fire Risk.

Never obstruct or modify the air inlet or outlet

grilles (louvers). This may create a re hazard

WARNING

10

Outdoor Lifestyles by Hearth & Home Technologies • Fortress - ODFORTG-36 Installation Manual • 4602-901 Rev G • 11/19

D. Constructing the Appliance Chase

A chase is a vertical box-like structure built to enclose the

gas appliance and/or its vent system. In cooler climates

the vent should be enclosed inside the chase.

NOTICE: Treatment of ceiling restops and wall shield

restops and construction of the chase may vary with the

type of building. These instructions are not substitutes

for the requirements of local building codes. Therefore,

you MUST check local building codes to determine the

requirements to these steps.

Chases should be constructed in the manner of all out-

side walls of the home to prevent cold air drafting prob-

lems. The chase should not break the outside building

envelope in any manner.

Walls, ceiling, base plate and cantilever oor of the chase

should be insulated. Vapor and air inltration barriers

should be installed in the chase as per regional codes for

the rest of the home. Additionally, in regions where cold

air inltration may be an issue, the inside surfaces may be

sheet rocked and taped (or an equivalent method may be

used) to achieve maximum air tightness.

NOTICE: Install appliance on hard metal or wood surfaces

extending full width and depth. DO NOT install directly

on carpeting, vinyl, tile or any combustible material other

than wood.

WARNING! Risk of Fire! Maintain specied air space

clearances to appliance and vent pipe:

• Insulation and other materials must be secured to prevent

accidental contact.

• The chase must be properly blocked to prevent blown

insulation or other combustibles from entering and

making contact with replace or chimney.

• Failure to maintain airspace may cause overheating and

a re.

To further prevent drafts, the wall shield and ceiling re-

stops should be caulked with caulk with a minimum of

300ºF continuous exposure rating to seal gaps. Gas

line holes and other openings should be caulked with

caulk with a minimum of 300ºF continuous exposure rating

or stuffed with unfaced insulation. If the appliance is being

installed on a cement surface, a layer of plywood may be

placed underneath to prevent conducting cold up into the

room.

Figure 3.4 Clearances to Combustibles

F

E=33 in.

G

H

I

E=43 in.

MINIMUM FRAMING DIMENSIONS*

A B** C* D E F** G** H I

Rough

Opening

(Vent Pipe)

Rough

Opening

(Height)

Rough

Opening

(Depth)

Rough

Opening

(Width)

Clearance

to ceiling

from opening

Clearance

to ceiling

from top of

appliance

Combustible

Floor

Combustible

Flooring

Sides of

Appliance

Front or

Rear of

Appli-

ance

Inches 10 44-1/2 23 49-1/2 37-3/4 33-1/2 0 See Note Below 1 48

Millime-

ters

254 1130 584 1257 959 851 0 See Note Below 25 1219

* Adjust framing dimensions for interior sheathing (such as sheetrock)

** Fireplace may need to be elevated from the oor affecting framing height B, depending on hearth construction. See Section 3.D

for hearth and combustible oor requirements.

C

A

B

D

HEADER

DEPTH**

HEADER

DEPTH**

APPLIANCE MAY BE

INSTALLED OFF OF FLOOR***

11

Outdoor Lifestyles by Hearth & Home Technologies • Fortress - ODFORTG-36 Installation Manual • 4602-901 Rev G • 11/19

E. Hearth Extension

WARNING! Risk of Fire! Hearth extension required

to protect combustible oors in front of appliance.

WARNING! Risk of Fire! DO NOT block ventilation

slots. A minimum 1/4 in. space between the bottom of

hearth refractory and top of eld installed hearth exten-

sion (marble, tile, granite, etc) is required across full width

of replace.

If the appliance is to be placed directly on the oor, the

non-combustible hearth material will be limited to 3/4 in.

thick, including the oor adhesive. If the hearth mate-

rial will exceed 3/4 in. thick, the appliance will need to

be shimmed from the oor appropriately to maintain 1/4

in. minimum space between the oor hearth and hearth

refractory.

The base of the replace may sit on a combustible sur-

face. The area in front of the replace must be protected

by a noncombustible hearth extension, unless the re-

place is raised a minimum of three inches above the com-

bustible oor or hearth. See Figures 3.5 and 3.6

Figure 3.6 Non-Combustible Zone

Figure 3.5 Fireplace Positioned on Combustible Surface

16 in.

(406 mm)

3-1/2 in.

(89 mm)

27-3/4 in.

(705 mm)

24 in.

(610 mm)

6 in.

(152 mm)

66-1/4 in.

(1683 mm)

WOOD OR OTHER

COMBUSTIBLE FLOOR

OR PLATFORM

MARBLE, GRANITE, TILE OR

OTHER NON-COMBUSTIBLE

HEARTH EXTENSION

3/4 in. MAX

8 in.

HEARTH

REFRACTORY

BOTTOM OF

FIREPLACE

NON-COMBUSTIBLE

MATERIAL ON SIDES

(PROFILE VIEW)

MINIMUM

1/4 in. SPACE

REQUIRED

• No combustibles in the area between the

two walls.

• If using 2” x 6” exterior framing material,

interior framing must be placed on edge in

order to maintain 16 in. clearance.

NOTE:

12

Outdoor Lifestyles by Hearth & Home Technologies • Fortress - ODFORTG-36 Installation Manual • 4602-901 Rev G • 11/19

A. Vent Termination Minimum Clearances

Roof Pitch H (Min.) Ft.

Flat to 6/12...........................................................1.0*

Over 6/12 to 7/12 .................................................1.25*

Over 7/12 to 8/12 .................................................1.5*

Over 8/12 to 9/12 .................................................2.0*

Over 9/12 to 10/12 ...............................................2.5*

Over 10/12 to 11/12 .............................................3.25

Over 11/12 to 12/12 .............................................4.0

Over 12/12 to 14/12 .............................................5.0

Over 14/12 to 16/12 .............................................6.0

Over 16/12 to 18/12 .............................................7.0

Over 18/12 to 20/12 .............................................7.5

Over 20/12 to 21/12 .............................................8.0

Figure 4.1 Minimum Height From Roof to Lowest Discharge

Opening

HORIZONTAL

OVERHANG

VERTICAL

WALL

GAS DIRECT VENT

TERMINATION CAP

12

X

ROOF PITCH

IS X/ 12

LOWEST

DISCHARGE

OPENING

2 ft.

MIN.

20 in. MIN.

H (MIN.) - MINIMUM HEIGHT FROM ROOF

TO LOWEST DISCHARGE OPENING

4

Termination Location and Vent Information

Fire Risk.

Maintain vent clearance to combustibles as

specied.

• DO NOT pack air space with insulation or other

materials.

Failure to keep insulation or other materials away

from vent pipe could cause overheating and re.

WARNING

Figure 4.2 Staggered Termination Caps

Gas, Wood or Fuel Oil

Termination Cap

B

Gas

Termination

Cap **

A *

*

If using decorative cap cover(s), this distance may need to be

increased. Refer to the installation instructions supplied with the

decorative cap cover.

**

A B

6 in. (minimum) up to 20 in.

152 mm/508 mm

18 in. minimum

457 mm

20 in. and over 0 in. minimum

In a staggered installation with both gas and wood or fuel oil

terminations, the wood or fuel oil termination cap must be

higher than the gas termination cap.

* H minimum may vary depending on regional snowfall.

Refer to local codes.

13

Outdoor Lifestyles by Hearth & Home Technologies • Fortress - ODFORTG-36 Installation Manual • 4602-901 Rev G • 11/19

Figure 4.3 Minimum Clearances for Termination

O

N

P

R

Q

X

= AIR SUPPLY INLET

A = 12 inches.................clearances above grade, veranda,

porch, deck or balcony

B = 12 inches. ................clearance to window or door that may

be opened, or to permanently closed

window

C = 18 inches .................clearance below unventilated soft

18 inches.................clearance below ventilated soft

30 inches ................clearance below vinyl soffits and

electrical service

D = 6 inches...................clearance to outside corner

E = 6 inches...................clearance to inside corner

F = 3 ft. (Canada) ..........not to be installed above a gas me-

ter/regulator assembly within 3 feet

horizontally from the center-line of the

regulator

G = 3 ft ...........................clearance to gas service regulator

vent outlet

H = 12 inches.................clearance to non-mechanical (unpow-

ered) air supply inlet, combustion air

inlet or direct-vent termination

i = 3 ft. (U.S.A.)

6 ft. (Canada) ...........clearance to a mechanical (powered)

air supply inlet

All mechanical air intakes within 10 feet of a termination cap

must be a minimum of 3 feet below termination.

J = 7 ft. ......................... On public property: clearance above

paved sidewalk or a paved driveway.

A vent shall not terminate directly above a sidewalk or paved

driveway which is located between two single family dwellings

and serves both dwellings.

V

= VENT TERMINAL

= AREA WHERE TERMINAL IS NOT PERMITTED

C

J

B

D

B

F

B

A

E

V

M

H or i

V

G

X

V

H

A

V

H

Electrical

Service

V

K

V

K

V

L

C

V

N = 6 inches ........... non-vinyl sidewalls

12 inches ......... vinyl sidewalls

O = 18 inches ......... non-vinyl soft and overhang

42 inches ......... vinyl soft and overhang

P = 8 ft.

Q

MIN

R

MAX

1 cap 3 feet 2 x Q

ACTUAL

2 caps 6 feet 1 x Q

ACTUAL

3 caps 9 feet 2/3 x Q

ACTUAL

4 caps 12 feet 1/2 x Q

ACTUAL

Q

MIN

= # termination caps x 3 R

MAX

= (2 / # termination caps) x Q

ACTUAL

Covered Alcove Applications

(Spaces open only on one side and with an overhang)

Measure horizontal clearances from this surface.

Measure vertical clearances from this surface.

CLEARANCE = 6 IN.

CAUTION! Risk of Burns! Termination caps are HOT,

consider proximity to doors, trafc areas or where people

may pass or gather (sidewalk, deck, patio, etc.). Listed cap

shields available. Contact your dealer.

• Local codes or regulations may require different

clearances.

• Vent system termination is NOT permitted in screened

porches.

• Vent system termination is permitted in porch areas with

two or more sides open.

• Hearth & Home Technologies assumes no responsibility

for the improper performance of the appliance when the

venting system does not meet these requirements.

• Vinyl protection kits are suggested for use with vinyl siding.

M = 12 inches .................. clearance under veranda, porch, deck,

balcony or overhang

Permitted when veranda, porch, deck or balcony is fully open

on a minimum of 2 sides beneath the oor.

K = 6 inches................. clearance from sides of electrical

service

L = 12 inches................ clearance above electrical service

Location of the vent termination must not interfere with access to the

electrical service.

B. Chimney Diagram

►

14

Outdoor Lifestyles by Hearth & Home Technologies • Fortress - ODFORTG-36 Installation Manual • 4602-901 Rev G • 11/19

C. Approved Pipe

This appliance is approved for use with Hearth & Home

Technologies DVP venting systems. SLP venting may

be used when a power vent is installed. Refer to Section

11.A for vent component information and dimensions.

DO NOT mix pipe, ttings or joining methods from differ-

ent manufacturers.

The pipe is tested to be run inside an enclosed wall.

There is no requirement for inspection openings at each

joint within the wall.

WARNING! Risk of Fire or Asphyxiation. This appli-

ance requires a separate vent. DO NOT vent to a pipe

serving a separate solid fuel burning appliance.

How to Use the Vent Graph

The Vent Graph should be read in conjunction with the

following vent installation instructions to determine the

relationship between the vertical and horizontal dimen-

sions of the vent system.

1. Determine the height of the center of the horizontal

vent pipe exiting through the outer wall. Using this

dimension on the Sidewall Vent Graph below, locate

the point intersecting with the slanted graph line.

2. From the point of this intersection, draw a vertical line

to the bottom of the graph.

3. Select the indicated dimension, and position the

replace in accorance with same.

Example: If the vertical dimension from the oor of

the replace is 11' (3.4 m) the horizontal run to the

face of the outer wall must not exceed 16' (4.9 m).

Sidewall Vent Graph showing the relationship between

vertical and horizonal dimensions for the Direct Vent ue

system.

Figure 4.4 Rear Wall Venting Graph (No Horizontal Elbows)

40

38

36

34

32

30

28

26

24

22

20

18

16

14

12

10

8

6

4

2

2 4 6 8 10 12 14 16 18 20

eg: A

Dimensions in Feet

Vertical Dimension From the Floor of Unit to the

Center of the Horizontal Vent Pipe

Horizontal dimension from the finished outside

wall to the center of the pipe on the fireplace.

15

Outdoor Lifestyles by Hearth & Home Technologies • Fortress - ODFORTG-36 Installation Manual • 4602-901 Rev G • 11/19

D. Use of Elbows

WARNING! Risk of Fire. This appliance requires a mini-

mum of 24 inches of vertical venting before attaching any

elbow to the appliance. DO NOT attach elbow directly to

the appliance.

Diagonal runs have both vertical and horizontal vent as-

pects when calculating the effects. Use the rise for the

vertical aspect and the run for the horizontal aspect. See

Figure 4.5.

Two 45º elbows may be used in place of one 90º elbow.

On 45º runs, one foot of diagonal is equal to 8-1/2 in. (216

mm) horizontal run and 8-1/2 in. (216 mm) vertical run. A

length of straight pipe is allowed between two 45º elbows.

See Figure 4.5.

Figure 4.6 shows the vertical and horizontal offsets for

DVP elbows.

Figure 4.5

HORIZONTAL

VERTICAL

RUN

RISE

EFFECTIVE

LENGTH

DVP

Pipe

Effective Length Rise/Run

Inches Millimeters Inches Millimeters

DVP4 4 102 2-3/4 70

DVP6 6 152 4-1/4 108

DVP12 12 305 8-1/2 216

DVP24 24 610 17 432

DVP36 36 914 25-1/2 648

DVP48 48 1219 34 864

DVP6A 3 to 6 76 to 152

2-1/8-4-1/4 54-108

DVP12A 3 to 12 76 to 305

2-1/8-8-1/2 54-216

Y

X

Vent Type

X

Inches Millimeters

DVP 16-1/4 413

Figure 4.6 Vertical and Horizontal Offset for DVP and SLP Elbows

Vent

Type

X Y

Inches Millimeters Inches Millimeters

DVP 4-1/2 114 17 432

16

Outdoor Lifestyles by Hearth & Home Technologies • Fortress - ODFORTG-36 Installation Manual • 4602-901 Rev G • 11/19

E. Measuring Standards

Vertical and horizontal measurements listed in the vent

diagrams were made using the following standards:

• Pipe measurements are shown using the effective length

of pipe. See Section 11.A Figure 11.1 for information on

effective length of pipe components.

• Horizontal terminations are measured to the outside

mounting surface (ange of termination cap) (see Figure

4.7).

• Vertical terminations are measured to top of last section

of pipe. See Figure 4.8.

• Horizontal pipe installed level with no rise.

MEASURE TO SHADED SURFACE

(OUTSIDE MOUNTING SURFACE)

Figure 4.7 Measure to Outside Mounting Surface

Figure 4.8. Measure to Top of Last Section of Pipe

General Rules:

• SUBTRACT 3 ft. from the total H measurement for each

90º elbow installed horizontally.

• SUBTRACT 1-1/2 ft. from the total H measurement for

each 45º elbow installed horizontally.

• A maximum of three 90º elbows (or six 45º elbows) may

be used in any vent conguration. Some elbows may be

installed horizontally.

• Elbows may be placed back to back anywhere in the

system.

• Any 90º elbow may be replaced with two back to back

45º elbows.

• When penetrating a combustible wall, a wall shield

restop must be installed.

• When penetrating a combustible ceiling, a ceiling restop

must be installed.

• This appliance requires a minimum of 24 inches of verti-

cal pipe attached directly to the appliance starting collar

before attaching a 90 degree or 45 degree elbow.

• Horizontal runs of vent do not require vertical rise;

horizontal runs may be level.

• Horizontal termination cap should have a 1/4 inch

downward slant to allow any moisture in cap to be

released.

F. Vent Diagrams

17

Outdoor Lifestyles by Hearth & Home Technologies • Fortress - ODFORTG-36 Installation Manual • 4602-901 Rev G • 11/19

Read all instructions completely and thoroughly

before attemping installation. Falilure to do so

could result in serious injury, property damage

or loss of life. Operation of improperly installed

and maintained venting system could result in

serious injury, property damage or loss of life.

WARNING

A. Installation Precautions

Consult local building codes before beginning the instal-

lation. The installer must make sure to select the proper

vent system for installation. Before installing vent kit,

the installer must read this replace manual and vent kit

instructions.

Only a qualied installer/service person should install the

venting system. The installer must follow these safety

rules:

• Wear gloves and safety glass for protection.

• Use extreme caution when using ladders or when on

rooftops.

• Be aware of electrical wiring locations in walls and

ceilings.

The following actions will void the warranty on your

venting system:

• Installation of any damaged venting component.

• Unauthorized modication of the venting system.

• Installation of any component part not manufactured or

approved by Hearth & Home Technologies.

• Installation other than permitted by these instructions.

Horizontal sections of this vent system require

a minimum of 3" clearances to combustibles at

the top of the ue and 1" clearance at the sides

and bottom until the ue penetrates the outside

wall. A minimum 1" clearance all around the ue

is acceptable at this point of penetration. Unless

the vertical run is 7-1/2 feet or higher from the

oor of the replace, the clearance for horizontal

run is 1" on all sides.

Vertical sections of this vent system require a

minimum of 2" clearance to combustibles at

the top of the unit directly above the stand-off.

A minimum of 1" clearance all aroun the ue is

acceptable thereafter.

WARNING

NOTICE: Failure to follow these instructions will

void the warranty.

*3 in.

**1 in.

FP2567

KSTDV vent clearances

24 in.

(610 mm)

72 in.

(1829 mm)

Figure 5.1 Combustible Clearances for Vent Pipe

* A minimum of 3" clearance to the top is required along

horizontal length until ue pipe penetrates outside wall.

** A minimum 1" clearance to combustibles permitted all

around ue at outside wall

FP2567

WARNING

This replace must be vented to the outside.

The venting system must NEVER be attached to

a chimney serving a separate solid fuel burning

appliance. Each gas appliance must use a

separate vent system. Do not use common vent

systems.

5

Venting Installation

18

Outdoor Lifestyles by Hearth & Home Technologies • Fortress - ODFORTG-36 Installation Manual • 4602-901 Rev G • 11/19

B. Installation Planning

There are two basic types of direct-vent installation:

• Horizontal Termination

• Vertical Termination

It is important to select the proper length of vent pipe for

the type of termination you choose. It is also important to

note the wall thickness.

For Horizontal Termination

Select the amount of vertical rise desired. All horizontal run

of venting must have 1/4" rise for every 12" of run towards

the termination below 7

1

⁄2" of vertical rise from oor of re-

place. With 7

1

⁄2 feet or more of vertical rise from the oor

of the replace, the horizontal run may be level. NEVER

run vent piping down.

You may use up to three 90° elbows in this vent congura-

tion. Refer to Vertical/Horizontal Termination Congurations

on Page 20.

For Vertical Termination

Measure the distance from the replace oor to the ceil-

ing. Add the ceiling thickness, the vertical rise in an attic

or second story, and allow for sufcient vent height above

the roof line.

NOTE: You may use two 45° elbows in place of a 90°

elbow. You must follow rise to run ratios when using

45° elbows. The appliance is approved for use with

three 90° elbows maximum or a combination of 90°

and 45° elbows up to a maximum of 270°.

NOTICE: When installing in a chase, you should

insulate the chase as you would the outside walls

of your home. This is especially important in

cold climates. Insulation should be considered a

combustible material. Maintain proper clearances

to all combustible materials.

NOTICE: Treatment of restops and construction of

the chase may vary from building type to building

type. These instructions are not substitutes for the

requirements of local building codes. You must follow

all local building codes.

Never run the vent pipe down. This may cause

excessive temperatures which could cause

a re.

For two-story applications, restops are required at each

oor level. If an offset is needed in the attic, additional pipe

and elbows will be required.

You may use a chase with a vent termination with exposed

pipe on the exterior of the house. See Installing Vent

System in a Chase below. If pipe is enclosed in chase, it

is not exposed.

It is very important that the venting system maintain its bal-

ance between the combustion air intake and the ue gas

exhaust. Certain limitations apply to vent congurations

and must be strictly followed.

C. Installation Instructions

Installing a Vent System in an Outside

Chase

A chase is a vertical boxlike structure built to enclose

venting that runs along the outside of a building. A chase

is required for such venting.

WARNING

Always maintain minimum clearances around

vent systems. The minimum clearances to

combustibles for horizontal vent pipe are 3”

at the top* and 1” at the sides and bottom

of the vent system until the pipe penetrates

the nearest vertical wall (1” required). A 1”

minimum clearance all around the pipe must be

maintained at outside wall and on vertical runs.

Do not pack the open air spaces with insulation

or other materials. This could cause high

temperatures and may present a re hazard.

*Unless the vertical run is 7

1

⁄2 feet or higher

from oor of replace, the clearance for the

horizontal run is 1” on all sides.

WARNING

19

Outdoor Lifestyles by Hearth & Home Technologies • Fortress - ODFORTG-36 Installation Manual • 4602-901 Rev G • 11/19

Vertical Sidewall Installation

NOTE: Sealant is not required to assemble replace

venting. Do not use silicone sealant at the inner ue

exhaust connections.

Step 1

Locate vent opening on the wall. It may be necessary to

rst position the replace and measure to obtain hole lo-

cation. Depending on whether the wall is combustible or

noncombustible, cut opening to size. See Figure 5.2 (For

combustible walls rst frame in opening.)

Combustible Walls: Cut a 10

1

⁄2”H x 10

1

⁄2”W (267 x 267

mm) hole through the exterior wall and frame as shown.

See Figure 5.2.

Noncombustible Walls: Hole opening must be 8

1

⁄2” (216

mm) in diameter.

Figure 5.4

Horizontal Length

Requirement

Noncombustible Walls: Hole opening must be 8

1

⁄2” (216

mm) in diameter.

Step 2

Secure restop to the inside frame, center in the 10

1

⁄2” x

10

1

⁄2” vent opening.

Step 3

Place replace into position. Measure the vertical height

(X) required from the base of the ue collars to the center

of the wall opening. See Figure 5.3.

Step 4

Using appropriate length of pipe section(s) attach to re-

place with three (3) screws. Follow with the installation of

the elbow.

Step 5

Measure the horizontal length requirement guring a 1

1

⁄4”

(32 mm) overlap, i.e. from the elbow to the outside wall

cap. See Figure 5.4

X

FP1385

VO584-100

Vent Opening

2/99 djt

10

1

⁄2”

(267 mm)

Min.

Fireplace Hearth

Opening for Noncombustible Wall

8

1

⁄2"

(216 mm)

Fireplace Hearth

Figure 5.2 Locate vent opening on wall

10

1

⁄2"

(267 mm) Min.

Vent Opening for Combustible Walls

Framing Detail

Note: Always install horizontal venting on a level

plane.

Step 6

Use appropriate length of pipe sections - telescopic or

xed - and install.

Sealing vent pipe and restop gaps with high tem-

perature sealant will restrict cold air being drawn in

around replace.

Step 7

Guide the vent terminations 5” and 8” collard into their

respective vent pipes. Double check that the vent pipes

overlap the collars by a minimum of 1

1

⁄4” (32 mm). Secure

the termination to the wall with screws provided and caulk

around the wall plate to weatherproof. As an alternative to

screwing the termination directly to the wall, you may also

use expanding plugs or an approved exterior construction

adhesive.

Note: Support horizontal pipes every 36” (914 mm)

with metal pipe straps.

Figure 5.3

Vertical Height

Requirement

20

Outdoor Lifestyles by Hearth & Home Technologies • Fortress - ODFORTG-36 Installation Manual • 4602-901 Rev G • 11/19

Vertical/Horizontal Termination

congurations

Since it is very important that the venting system maintain

its balance between the combustion air intake and the ue

gas exhaust, certain limitations as to vent congurations

apply and must be strictly adhered to.

The Vent Graph, showing the relationship between vertical

and horizontal side wall venting, will help to determine the

various dimensions allowable. See Figure 4.4.

NOTE: Horizontal sections of this vent system require

a minimum of 3" clearances to combustibles at the top

of the ue and 1" clearance at the sides and bottom

until the ue penetrates the outside wall. A minimum

1" clearance all around the ue is acceptable at this

point of penetration. Unless the vertical run is 7

1

⁄2 feet

or higher from oor of replace, the clearance for the

horizontal run is 1" on all sides.

Vertical sections of this vent system require a minimum

of 1" clearance to combustibles on all sides of the pipe.

When vent exits through foundations less than 20" below

outcrop, the termination must be ush up with outcropped

wall above.

It is best to locate the replace in such a way that minimizes

the number of offsets and horizontal vent length.

The horizontal vent run refers to the total length of vent

pipe from the ue collar of the replace (or the top of the

Transition Elbow) to the face of the nished outside wall.

• The maximum number of 90° elbows per side wall

installation is three (3). See Figure 5.5.

Figure 5.5 Maximum Three (3) 90° Elbows Per Installation

3 x 90° Elbows

24" Min.

FP1380

• If a 90° elbow is used in the horizontal vent run (level

height maintained) the horizontal vent length is reduced

by 36". Refer to Figure 5.7. This does not apply if the

90° elbows are used to increase or redirect a vertical

rise.

Example: According to the vent graph (page 14) the maxi-

mum horizontal vent length in a system with a 10' vertical

rise is 17

1

⁄2’ (5.3 m) and if a 90° elbow is required in the

horizontal vent it must be reduced to 14

1

⁄2' (4.4 m).

In Figure 5.7 dimension A plus B must not be greater than

14

1

⁄2' (4.4 m).

A

B

10 ft.

FP2546

Horizontal run

reduction

Figure 5.7 Horizontal Run Reduction

FP2546

• A minimum of 24" is required before a 90° elbow. If a 90°

elbow is tted directly after 24" vertical section mounted

to the top of the replace, the maximum horizontal vent

run before the termination is 36” (914 mm). See Figure

5.6.

Max. 20"

(508mm)

36"

(914mm)

FP1381

Figure 5.6 Horizontal Run with Minimum Vertical Rise

*NOTE: With a 24"

rise, the maximum

horizontal run is 36".

24"

(610 mm)

Min.

90° Elbow = 36" (914 mm)

Reduction

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