Return Air Fans - Make Up Air Fans - Supply Air Fans
Return air fans are designed to work with exhaust air fans in order to provide a balanced commercial grease extraction system. Supply air fans bring fresh fresh air back into your building in order to provide a balance between the vent hood and the building's HVAC and mechanical systems. Supply air fans are required by code in most areas of the United States where type-1 grease extraction venthoods are used. Always check with your city's building code to understand the requirements needed when working with a commercial vent hood system.