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Make-Up Air System/Exhaust

A Make-Up Air System is a pressure activated damper that opens whenever the central fan is on or when the home becomes depressurized.

Exhaust ventilation systems remove air from a particular location, often leading to depressurization in the home. Replacement or make-up air will infiltrate through leaks in the building shell and other uncontrolled sources. A make-up air damper can be added to the central system when exhaust ventilation is employed. The MAS provides replacement air as needed from a controlled source into the return air plenum where it is tempered and distributed throughout the home. The Make-Up Air System consists of a make-up air damper, mounted on the return air duct of an HVAC system, and an intake air hood, installed through an exterior wall, to allow outdoor air into the home, with the two being typically connected by installer-supplied standard 6″ galvanized sheet-metal pipe. Functions with or without the HHSC+.

Specifications

PART # MODEL DESCRIPTION

MAS-1 INCLUDED:
1- Make-Up air damper with air flow adjustment slide
1- Mounting template
1- 6" intake hood (not included with MAS-2)

MAS-2 INCLUDED:
1- Make-Up air damper with air flow adjustment slide
1- Mounting template
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