58-7/8"
[1496]
effective
height
42" [1067]
23"
[585]
7-1/2"
[192]
Ø13"
[330]
39-1/8"
[995]
47" [1194]
28"
[711]
23-1/2"
[597]
14"
[356]
Gas
Knockout
8-3/8"
[213]
14"
[356]
39-1/8"
[994]
39-1/8"
[994]
38-3/8"
[975]
11-3/4"
[398]
Gas
Knockout
Outside
Air
8-3/8"
[213]
14"
[356] 8-5/8"
[319]
Top View
Front View
Left Side View Right Side View
Specifications
Additional information can be found online at www.heatilator.com or www.fireplaces.com
ST42A
Please consult the manufacturer’s
installation manual for all details and
requirements before making a final
design layout decision.
See-Through
42" Wood Fireplace
MODEL FRONT WIDTH BACK WIDTH HEIGHT DEPTH FIREPLACE OPENING
ST42A Actual Framing Actual Framing Actual Framing Actual Framing 42 x 23
47 48 47 48 58-7/8 39-1/8* 28 27
* Framing must be filled in to top of front
standoff after unit is installed.
CLEARANCES TO COMBUSTIBLES
FRAMING DIMENSIONS
MANTEL LEG/WALL PROJECTIONS
APPLIANCE LOCATION
MANTEL PROJECTIONS
HEARTH EXTENSIONS
66" [1676]
42" [1067]
20" [508]
1/2"
[13]
Hearth
Extension
64"
[1626]
12" [305] min to
perpendicular wall
27"
[686]
Note: Fireplace heade
r
cannot be positioned
unitl after the fireplace
assembly is in place.
12" [305] max.
48"
[1219]
2" [51]
17"
[432]
47" [1194]
42" [1067] 9-3/4"
[248]
12" [305]
12" [305]
11-3/8"
[289]
Grid represents 1" [25] squares
FLUSH
FRONT
4"
[102]
BRICK
FRONT
50° angle
39° angle
66" [1676]
20"
[508]
12"
[305]
(insulation)
0" to level
of standoffs
Attic
Insulation
Shield
(ceiling)
(roof)
(attic)
(ceiling)
Ceiling Firestop
Offset/Return (secured
with hanger straps)
Storm Collar
Roof Flashing
1/2" [13] sides
of appliance
Must have 2" [51] min
clearance to header
0" to floor
2" [51] minimum
Shaded areas represents
2" [51] min. air space
clearance required around
pipe.
Combustible Object
48"
[1219]
Mantel
7 ft [2134]
minimum
base of fireplace
to ceiling
Combustible Wall
2 x 4
stud wall
Standoffs
Measured from top
of fireplace opening
12" [305]
1-1/ 2" [38]
maximum
6" [152]
minimum
6" [152]
minimum
12" [305]
minimum
Combustible
Decorative Facing
Non-combustible
Decorative Facing
such as: steel, iron
brick, tile, concrete,
slate, glass, plaster
Seal joint with
non-combustible
sealant
Specifications
WM/HTL/ST42A_0615
Additional information can be found online at www.heatilator.com
Lakeville, MN Phone: (800) 927-6841
Web: www.heatilator.com
PRODUCT LISTING CODES
US UL 127
CAN ULC-S610
Product information provided is not
complete and is subject to change without
notice. Product installation must adhere
strictly to instructions accompanying
product to avoid risk of fire and potential
injury.
ST42A
/