Fresh Filtered Air Unit Roof Supply Fan – 12 in

Specifications

Features

• Mono-piece welded housing eliminates fastener-joint fatigue points that loosen under continuous rooftop motor vibration over extended service cycles
• Housing available in galvanized steel for standard environments or stainless steel for sustained grease and condensate exposure above commercial kitchen exhausts
• Impeller blade geometry optimised for the 12-inch diameter to achieve 3,600 CFM without the turbulence noise generated by undersized, high-RPM alternatives of equivalent capacity
• Housing dimensions contained within the footprint of a standard 12-inch duct curb, minimising roof membrane modification required during installation
• Inline duct connection maintains full 12-inch duct velocity pressure through the supply path with no cross-sectional area reduction at the fan inlet
• Chinese Energy Saving Label certification verifies measured efficiency compliance at the 1.5 HP / 3,600 CFM duty point under standardised test conditions
• ISO 9001:2000 quality management compliance ensures consistent impeller-to-housing clearance and repeatable airflow output across production batches

The 12-inch Fresh Filtered Air Unit moves 3,600 CFM at 1.5 HP, engineered for medium-sized commercial kitchens, food court stalls, and retail units up to approximately 1,500 sq ft that need positive fresh-air pressure to balance the exhaust output of two cooking stations running simultaneously. The direct inline connection to standard 12-inch circular ductwork eliminates transition adapters and the static pressure loss they introduce, preserving the full rated airflow at the served diffusers.

At 3,600 CFM, this unit offsets the exhaust from a commercial hood serving two to three cooking positions, holding the kitchen at neutral or slight positive pressure and preventing back-drafting through gas appliance flues. The ISO 9001:2000-governed manufacturing process ensures each unit’s impeller pitch and housing clearances are held within the tolerances required to deliver that airflow consistently at the rated 1.5 HP draw, without deviation that would leave the kitchen under-ventilated during peak service.

In capacity terms, this unit sits between the Fresh Filtered Air Unit Roof Supply Fan – 10 in at 2,100 CFM and the 15-inch model at 4,700 CFM. The 10-inch model is the correct choice when the required supply volume is below 2,500 CFM; moving up to the 15-inch / 2 HP unit is only warranted when hood exhaust volumes exceed 4,000 CFM or when building codes specify higher air change rates for the occupancy category.

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