Makeup Air System (750 CFM)


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The Fantech MUAS is a "powered" or "fan-forced" system. The MUAS is triggered when the compensated exhaust system is energized. The MUAS damper opens and the MUAS fan is powered on. The fan is speed-controlled relative to the speed of the compensated exhaust system's fan speed. In other words, as you speed up the exhaust fan, the MUAS fan speeds up too, and vice versa.

  • MUAS provides the EXACT amount of air needed - no more, no less
  • Particulate matter is filtered from the outdoor air before it is delivered to the home
  • Since it is fan-forced, makeup air can be ducted to where it can be most suitably delivered to the home
  • Cold outdoor air can be tempered with optional MUAH heater kits
  • MUAS can be set up by the installer for a variety of pressure schemes: slightly negative, slightly positive, or balanced
  • Complies with the International Residential Code (IRC) for kitchen makeup air requirements

MUAS 750 includes a 8” EC-motor fan with airflow up to 750 cfm (max), 8” metal intake wall hood, 8” motorized shut-off damper, 8” filter cabinet with a pleated filter, 8” duct silencer, 3 pairs of 8” mounting clamps, FMAC controller.

Your climate zone might necessitate a heater for the delivery of makeup air into the building. The optional MUAH heater may be chosen separately, if desired.

Each MUAS includes the patented FMAC controller, which provides the automatic operation of the makeup air system. While the compensated exhaust system is operating, the makeup air fan supplies air at a rate necessary to maintain the desired building pressure scheme as set up by the installer. The makeup air flow rate automatically and infinitely varies proportionally with the speed at which the exhaust is operated by the homeowner. A neutral (balanced) pressure scheme is common, but the installer can also employ a slightly positive or negative pressure scheme should it be desired. The FMAC includes a current transducer, system controller, transformer, and a NEMA electrical enclosure.

Product Type:

Air System

Max Airflow (CFM):


Duct Size:



5 Year