Brochure

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VENTILATION
Features
• Adjustable gate provides precise air ow control
• Pressure activated
• Easy to read air ow gauge
• No electricity required
• 24 gauge aluminum coated steel
• Corrosion resistant and paintable
• Intake air hood included
• Quiet operation
How It Works
The MAS is connected to the outside via an intake air
hood and to the central HVAC system via return duct.
When the home goes negative because air is being pulled
from the house through the chimney, a range hood fan, or
any mechanical means, the damper automatically opens
to allow make-up air to enter the HVAC return. The air is
then tempered and distributed to the house. The damper
closes automatically when the fan is turned off and/or the
home returns to a balanced state. The gate is adjustable
to provide precise control of air flow.
RETURN AIR DUCT
FURNACE
AC COIL
Intake Air
Hood
Make-Up
Air Damper
Healthy Home
System
™
Control+
(Optional)
Make-Up Air System
Note: The IAH-4 and the IAH-6 can be purchased separately.
Includes Intake
Air Hood IAH-6
A simple, economical method to provide make-up air,
this pressure-activated damper opens automatically
when there is a need for additional air in the home.
Since there is no motor, it works without electricity or
the need for a separate control. It has an adjustable
gate to control the amount of air flow.
• To improve appliance efficiency
• To improve indoor air quality
• To conserve energy
• To increase fresh air changes
• To replace air exhausted by bathroom
fans, laundry dryers, range hood fans,
and other exhaust devices
Additional uses of the MAS
Whole House Make-Up Air System
Make-Up Air System
WHOLE HOUSE
FRESH
Model Product Description Voltage Amps Watts
MAS-1
Fresh Air/Make-Up Damper Pressure activated, fits 6" duct or pipe – – –