Fresh Filtered Air Unit Roof Supply Fan 15 inch

Specifications

Features

• Full mold forming and continuous weld seams prevent the housing flex that causes resonance noise at larger impeller diameters where casing deflection under airflow pressure is more pronounced
• Stainless steel housing option is the recommended material selection for 15-inch units positioned directly in the grease discharge path above heavy-cooking commercial kitchens
• Engineered axial blade pitch at 15 inches achieves 4,700 CFM with lower sound pressure levels than centrifugal alternatives of equivalent capacity at the same duct diameter
• Compact exterior profile allows installation on existing 15-inch duct curbs without structural roof reinforcement in most standard commercial construction
• Connects directly to standard 15-inch circular duct runs without a reducer fitting, preserving the designed supply velocity from rooftop to terminal diffusers
• Chinese Energy Saving Label certification provides independent verification of the 2 HP motor’s efficiency at the 4,700 CFM rated operating point
• ISO 9001:2000 standard applies to all fabrication steps including sheet metal forming, impeller sub-assembly, and pre-shipment performance testing at the rated 2 HP draw

The 15-inch Fresh Filtered Air Unit produces 4,700 CFM at 2 HP, the correct specification for full-service restaurant kitchens with three or more active cooking stations and any commercial application where the exhaust hood capacity sits between 4,000 and 5,000 CFM. The stainless steel housing option becomes particularly relevant at this size because 15-inch units positioned above heavy-cooking operations accumulate grease film across a larger casing surface area than smaller models, accelerating corrosion of galvanized coatings over multi-year service periods.

At 4,700 CFM, this unit supplies enough filtered fresh air to compensate for a Type I commercial hood exhausting at 4,500 CFM, keeping the kitchen at neutral pressure and preventing gas appliance back-drafting. Notably, this model and the 18-inch / 5,450 CFM model (ID 1190) share the same 2 HP motor class, which confirms that impeller diameter — not motor size — is the primary variable separating mid-range capacity tiers in this series; the 15-inch blade sweeps less area per revolution and therefore moves 750 CFM less at equivalent rotational energy.

For projects where the hood exhaust volume falls below 4,000 CFM, the Fresh Filtered Air Unit Roof Supply Fan – 12 in at 3,600 CFM covers that demand without oversizing; when the required supply volume exceeds 5,000 CFM, the Fresh Filtered Air Unit Roof Supply Fan – 18 in at 5,450 CFM is the direct next step at the same 2 HP motor class.

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Fresh Filtered Air Unit Roof Supply Fan -18 inch

Fresh Filtered Air Unit Roof Supply Fan – 18 in

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