True Makeup Air System
Anything else is cheating the Code
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 otherwords, as you speed up the exhaust fan, the MUAS fan speeds up too, and vice versa.