MUAS 750 Makeup Air System

for banalcing kitchen exhaust up to 750 cfm, 8" duct

Item Number: K46013

The Fantech Makeup Air System (MUAS) is a "powered" or "fan-forced" system, which is triggered when the compensated exhaust system is energized: the motorized shut-off damper opens and the MUAS fan is powered on. The MUAS fan is automatically speed-controlled relative to the speed of the compensated exhaust system fan’s speed. In other words, as the exhaust fan’s speed is increased and decreased the MUAS fan’s speed is automatically controlled so that the makeup air flow compensates the exhaust air flow rate proportionally.

• 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 MERV10 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.

Technical parameters

Nominal data
Air flow max 354 L/s
Dimensions and weights
Duct dimension; Circular, inlet 8 in.
Duct dimension; Circular, outlet 8 in.
Weight 121 lb
Duct connection type Circular
Color name, casing Grey
Motor type EC
Images Wiring - MUAS 750 Makeup Air System - Fantech
Images Dimensions - MUAS 750 Makeup Air System - Fantech
Model A B C D E F H (optional) G J

MUAS 750

10 (254)

10 (254)

30 1/2 (775)

7 7/8 (200)

26 5/8 (676)

85 (2159)

14 (356)

99 (2515)

8 (203)

MUAS 1200

10 (254)

10 (254)

30 1/2 (775)

9 13/16 (249)

38 1/2 (978)

98 13/16 (2510)

14 (356)

112 13/16 (2865)

10 (254)

Dimensions in inches (mm)

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