BROAN MD6TU Automatic Make-Up Air Damper Installation Guide

: June 9, 2024
: Broan

Table of Contents

Equalize indoor air pressure for a well-balanced home and budget.
Causes of unbalanced air pressure
MD6TU/8TU/10TU Universal Design
Easy installation with no direct wiring required
Tools for installers and consumers
SUPPORT
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

BROAN MD6TU Automatic Make-Up Air Damper Installation Guide

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 Specifier” 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 efficiency

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.

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

Easy installation with no direct wiring required

![Easy installation with

no direct wiring required](https://manuals.plus/wp- content/uploads/2023/01/Screenshot_5-70.jpg)

Tools for installers and consumers

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 Specifier Specifying the right make-up air damper system by state. A simple form gathers all details and delivers specific product and installation results. Download at:
Broan-NuTone.com/en-us/home/specifier-tools
BESTrangehoods.com/specifier-tools/muad

INSTRUCTION

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.