Designing residential ventilation networks requires precision engineering to handle structural airflow demands, maintain building envelope pressure balance, and meet building code standards.
Modern high-efficiency homes feature tight thermal envelopes that risk severe depressurization when high-capacity range hoods operate. IRC M1503.4 and NBC 2020 9.32.3.8 mandate make-up air systems for exhaust hood capacities exceeding 400 CFM. Depressurization as low as 0.02 in. w.g. can pull combustion gases backward through flues and water heater chimneys, causing back-drafting hazards.

MUAS Unitary Residential Makeup Air Systems
The Fantech MUAS operates as a fully integrated, powered supply system that automatically tempers and modulates airflow in direct proportion to kitchen exhaust rates.
- Proportional Control: Uses the Fantech Makeup Air Controller (FMAC) with a current transducer attached to the exhaust fan’s neutral leg to track motor current and automatically balance airflow.
- Unitary Cabinet Assembly: Consists of an electronically commutated (EC) motorized impeller, integrated MERV 11 pleated filter, and internal control module housed within a 1-inch mineral wool insulated galvanized cabinet.
- Motorized Backdraft Prevention: Includes a 24VAC motorized shut-off damper that seals the supply duct whenever the system is inactive.
- Model Configurations:
MUAS 8 – Delivers 690 CFM at 0.2 in. w.g. static pressure using an 8-inch duct connection.
MUAS 10 – Delivers 1070 CFM at 0.2 in. w.g. static pressure using a 10-inch duct connection.
- Optional Air Tempering: Integrates with MUAH electric duct heaters (6 kW MUAH 8/6 for 8-inch ducts; 10kW MUAH 10/10 for 10-inch ducts) featuring an electronic air velocity sensor to prevent operation below 100 FPM.
MUAS Product Page | MUAS Specs
FKD Series Inline Centrifugal Fans
The FKD series is a perfect compliment to pair with the MUAS. The FKD creates a quiet, efficient, and fully integrated airflow circuit when placed downstream from the MUAS, and upstream from the hood liner.
- Construction: Manufactured with an airtight 22-gauge galvanized steel housing.
- Versatile Duct Integration: Engineered for seamless inline installation across multiple duct sizes, including 8-inch and 10-inch configurations.
- High-Output Performance:
FKD 8XL – Ranges from 836 CFM @ 0 in. w.g. to 499 CFM @ 1.0 in. w.g.
FKX 10 – Ranges from 910 CFM @ 0 in. w.g. to 547 CFM @ 1.0 in. w.g.
FKD 10XL – Ranges from 1266 CFM @ 0 in. w.g. to 900 CFM @ 1.0 in. w.g.
FKD Series Product Page | FKD Series Specs
HL Range Hood Liners
The HL series hood liners serve as the collection interface for remote inline or exterior-mounted exhaust fans, removing fan noise from the kitchen environment.
- Construction: Heavy-gauge stainless steel fascia with an internal galvanized steel structure housing washable steel baffle filters.
- Lighting & Controls: Integrated dimmable 50W halogen lights and an infinite variable speed control knob.
- Dimensions & Duct Connections:
HL 30 & HL 36 – Feature 8-inch top duct collars (Duct Size: 8″).
HL 42 & HL 48 – Feature 10-inch top duct collars (Duct Size: 10″).
Range Hood Liner Product Page | Range Hood Liner Specs
A high-performance kitchen exhaust system requires more than just capturing smoke and grease at the range hood. Integrating Fantech’s kitchen exhaust systems creates a fully balanced ventilation ecosystem. Together, these components protect the home against dangerous back-drafting, safeguard indoor air quality with MERV 11 supply filtration, and deliver an energy-efficient kitchen ventilation system.
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