Broan® Automatic Make-Up Air Damper Application Guide

1 Broan Automatic Make-Up Air Damper Product Guide 04-17-13 1 Broan Automatic Make-Up Air Damper Application Guide Residential Use Only Read and Save this Information INSTALLER: Leave this Guide with the consumer. Broan NuTone LLC Hartford, Wisconsin 800-558-1711 99044565B Broan Automatic Make-Up Air Damper Product Guide 04-17-13 2 About the Application Guide Congratulations on your purchase of the Broan Automatic Make-Up Air Damper ! This product, called the Damper throughout this Guide , is designed to keep your home well ventilated and comfortable for years to come. The Damper works automatically once it s properly installed with a compatible Broan , NuTone , or BEST exhaust device, so you won t have to give your home s exhaust systems a moment s thought.

2 Please read this Guide thoroughly, noting the specific applications for which the Broan Automatic Make-Up Air Damper is intended, as well as the different installation approaches. Installers note that a separate set of Installation Instructions for the Damper is available from Broan. The Application Guide does not contain specific installation instructions. Important Information about the Application Guide Please take note that this Guide uses the following symbols to emphasize particular information: About the Broan Automatic Make-Up Air Damper Unit TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK, OR INJURY TO PERSON(S) OBSERVE THE FOLLOWING: 1.

3 This Damper is intended for residential installation only. 2. Installation work and electrical wiring must be done by a qualified person(s) in accordance with all applicable codes and standards, including fire-rated construction codes and standards. 3. This Damper is not designed to provide combustion air for fuel-burning appliances. 4. Sufficient air is needed for proper combustion and exhausting of gases through the flue (chimney) of fuel burning equipment to prevent backdrafting. Follow the heating equipment manufacturer s guideline and safety standards such as those published by the National Fire Protection Association (NFPA), and the International Fuel Gas Code (IFGC), and the local code authorities.

4 Broan Automatic Make-Up Air Damper Product Guide 04-17-13 3 5. Do not connect the Damper directly to a combustion appliance of any type. 6. Before servicing or cleaning Damper , switch power off at service panel and lock the service disconnecting means to prevent power from being switched on accidentally. When the service disconnecting means cannot be locked, securely fasten a prominent warning device, such as a tag, to the service panel. 7. When performing installation, servicing or cleaning the Damper , it is recommended to wear safety glasses and gloves. 8. The Damper is approved for use with compatible Broan, BEST, and NuTone products. Unless specifically noted, Broan does not warrant proper operation of the Damper if used in conjunction with other brands of exhaust devices.

5 9. Ensure that the intake area for the outdoor air duct is free of potential obstructions and maintained regularly. 10. When cutting or drilling into wall or ceiling, do not damage electrical wiring or other hidden utilities. 11. When notching or drilling into framing including floor supports, rim joists, and wall studs, comply with code and manufacturer limitations on allowable modifications to these structural members. 12. This Damper is intended to be installed within the home in a location protected from moisture. 13. This unit must be in an accessible location which allows for inspection of the Damper . 14. Use this Damper only in the manner intended by the manufacturer.

6 If you have questions, contact the manufacturer at the address or telephone number listed in this document. 15. When federal, provincial, state, or local legislation or building codes comprise more restrictive installation and/or certification requirements, the aforementioned requirements prevail on those of this document, and the installer agrees to conform to these at his own expense. 1. Damper is for general household ventilation only. Do not use for ventilation near hazardous materials or explosives. 2. Damper shall not be installed to introduce air from crawlspaces, garages, attics, adjacent dwelling units, or other locations within the building shell.

7 Damper shall be installed to introduce air directly from outdoors. 3. Do not run the outdoor air duct directly above or closer than 2 feet to any furnace or its supply plenum, boiler, or other heat producing appliance. 4. Any ductwork used in conjunction with the Damper must be installed in compliance with all local and national codes that are applicable. 5. Do not operate the Damper for fresh outdoor air introduction until all system filters, including the central duct system filter, have been installed per the system design. CAUTION Broan Automatic Make-Up Air Damper Product Guide 04-17-13 4 6. Please read the Damper specification label on the product for further information and requirements.

8 7. The Damper s outdoor air intake, ducting, and any filters should be inspected and maintained on a regular basis. Broan Automatic Make-Up Air Damper Product Guide 04-17-13 5 Table of Contents 1. Definitions & Key Terms .. 6 2. What is Make-Up Air? .. 7 3. Broan Automatic Make-Up Air Damper Product Function .. 8 4. Different Models of the Broan Automatic Make-Up Air Damper .. 8 5. When to Use the Broan Automatic Make-Up Air Damper .. 9 6. Common applications .. 9 applications with the LinkLogic Model (SMD* model) .. 10 applications with the Direct-Wired Model (MD*T model) .. 10 applications with the Universal Model (MD*TU model) .. 11 applications with the Slave Model (MD*S model).

9 11 7. Planning the Installation .. 12 Sizing the Damper & the Duct .. 12 Using the On-line Make-Up Air Specifier .. 13 Simplified Sizing in the Absence of Building Codes .. 14 Testing .. 14 Outdoor Air Intake 14 Outdoor Air Intake Opening Protection .. 15 Climatic Considerations for Outdoor Air (OA) Ducts Connected to Central Duct Systems .. 15 8. Typical Installations .. 16 Damper Connected to Return Side of Central Duct System .. 16 Damper and OA Duct Connected Directly to a Ceiling, Floor, or Wall Register 16 9. Installation .. 17 10. System Operation .. 17 11. Maintenance .. 17 12. Frequently Asked Questions (FAQs) .. 18 Broan Automatic Make-Up Air Damper Product Guide 04-17-13 6 1.

10 Definitions & Key Terms Within the scope of this document, several important terms are used. To give product installers and users a clear understanding, several key terms are defined below. Available static pressure: for the purpose of this Guide , available static pressure represents the amount of suction that is available to draw in outdoor Make-Up air when the central air handler is running. Manual D, the industry standard for sizing residential duct systems, notes that an available static pressure between and in is typical at the return plenum. When estimating the flow through a Make-Up air Damper that is connected to a return trunk, provide the available static pressure at the operating speed of the blower that will be used when the Make-Up air Damper is engaged.