Broan MD6TU Installation guide

MD6TU
Broan
Brand
Broan
Model
MD6TU
Type
Installation guide

Broan MD6TU, a heavy-duty galvanized steel make-up air damper, automatically replaces exhaust air removed by ventilation fans and range hoods. It synchronizes with Broan or BEST ventilation products, ensuring optimal performance and balanced air pressure in your home. Installation is simple, with no special wiring required, and it works with any 6" round duct running from an exterior wall to your forced-air system's cold air return.

Broan MD6TU, a heavy-duty galvanized steel make-up air damper, automatically replaces exhaust air removed by ventilation fans and range hoods. It synchronizes with Broan or BEST ventilation products, ensuring optimal performance and balanced air pressure in your home. Installation is simple, with no special wiring required, and it works with any 6" round duct running from an exterior wall to your forced-air system's cold air return.

Automatic
Make-Up
Air Damper
Equalize indoor
air pressure for
a well-balanced
home and budget.
Providing make-up air for exhaust devices is now
easier than ever. Broan® Automatic Make-Up Air
Dampers synchronize with kitchen, bath, and
whole-house ventilation products to keep your
home breathing easy. Installation requires no
special wiring, and built-in intelligence ensures
optimum performance in any application. Rely on
our online “Range Hood Make-Up Air Specier”
to guide the design process and deliver the right
make-up air system for any home.
• 6", 8" and 10" duct options work
with any ventilation product
• Synchronize with more than one Broan
or BEST ventilation product
• Opens automatically to replace exhaust air
• Closes tightly and prevents excess air from
entering to reduce energy consumption
• Meets IRC make-up air code requirements
for range hoods >400 CFM
Causes of unbalanced air pressure
When ventilation fans and range hood exhaust polluted indoor air to the
outside, negative air pressure develops unless fresh outdoor air is brought in.
Supply ventilation systems push air into the home causing positive pressure.
Effects of Positive Air Pressure
(supply systems)
• Forces warm/humid air into wall
cavities causing mold/mildew
and structural issues
• Unconditioned air is pushed
into the home resulting in
increased energy costs
Effects of Negative Air Pressure
(exhaust systems)
• Exhaust fans unable to work
at full, rated capacity
• Unconditioned air is pulled
into the home, resulting in
increased energy costs
• Hot/humid air is drawn inside,
causing mold/mildew and
structural damage
Optimal Balanced Air Pressure
• Air intake and exhaust are equalized
• Ventilation devices function
properly, as rated
• Maintains the home’s integrity
• Enhances energy efciency
MD6TU/8TU/10TU Universal Design
Works with any BEST® or Broan® range hood over 300 CFM.
No direct wiring between the range hood and the damper is needed.
Tools for installers and consumers
Make-Up Air Damper Application Guide
Learn about make-up air and how the damper works with
range hoods. Download at: Broan-NuTone.com/en-us/
home/customer-service/catalogs
Range Hood Make-Up Air Specier
Specifying the right make-up air damper system by state.
A simple form gathers all details and delivers specic
product and installation results. Download at:
Broan-NuTone.com/en-us/home/specier-tools
BESTrangehoods.com/specier-tools/muad
System Features
• Heavy-duty galvanized
steel construction
• Normally closed rugged,
motorized damper
• Air flow sensor assembly,
low voltage switch and
24VAC transformer
• Available duct options:
– 6" round (MD6TU)
– 8" round (MD8TU)
– 10" round (MD10TU)
Installation (see below)
• Fresh air inlet models 641FA
(6"), 643FA (8") or 610FA (10"),
bring outdoor air in
• Works with 6", 8" or 10" duct
running from an exterior wall
to the cold air return of a
forced-air system
• If there is no forced-air
return, run to a wall or
ceiling register that
minimizes concerns about
drafts and maintains a 5'
separation from the cooking
appliance or hood
• Gang damper assemblies
for high-volume
applications—open and
close simultaneously
• Install the low-voltage sensor
on any exposed section
of the exhaust duct
without interfering with
the backdraft damper
Select BEST or
Broan Range Hoods
Make-Up Air Damper (normally
closed) optimally installed in air
return duct of forced-air system
Switched
Voltage
Sensor Low
Voltage
Transformer
Easy installation with
no direct wiring required
Fresh Air Inlet
Air ow sensor installs
directly to the range
hood exhaust duct
©2022 Broan-NuTone | Printed in USA | 99851150A | 09/22
BROAN-NUTONE.COM | 800-558-1711 | 926 WEST STATE STREET, HARTFORD, WISCONSIN 53027
THE LEADER IN RESIDENTIAL INDOOR AIR QUALITY.
COME HOME TO FRESH AIR.
Broan-NuTone® is America’s leading brand of residential ventilation products including range hoods, ventilation fans,
fresh air systems, and automated whole home indoor air quality monitoring and ventilation system.
RANGE
HOODS
OVERTURETM
SYSTEM
VENTILATION
FANS
FRESH AIR
SYSTEMS
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Broan MD6TU Installation guide

MD6TU
Broan
Brand
Broan
Model
MD6TU
Type
Installation guide

Broan MD6TU, a heavy-duty galvanized steel make-up air damper, automatically replaces exhaust air removed by ventilation fans and range hoods. It synchronizes with Broan or BEST ventilation products, ensuring optimal performance and balanced air pressure in your home. Installation is simple, with no special wiring required, and it works with any 6" round duct running from an exterior wall to your forced-air system's cold air return.

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