--- title: Can speed controls made by other manufactures be used with Air Vent roof-mount power fans? description: You cannot use speed controls from other manufacturers with Air Vent power fans. --- [Skip to content](https://help.gibraltarbuildingproducts.com/en/knowledge/will-speed-controls-made-by-other-manufactures-such-as-broan-fantech-and-kb-electronics-work-with-your-roof-mount-electric-power-vent-asr-hp#main-content) English Show submenu for translations ![GBAD Full Color.png](https://blog.stealthbond.com/hubfs/GBAD%20Full%20Color.png) Open main navigation Close main navigation - English Show submenu for translations - Go to www.gibraltarbuildingproducts.com Go to www.gibraltarbuildingproducts.com Hello. How can we help you? - There are no suggestions because the search field is empty. 1. [Help Center](https://help.gibraltarbuildingproducts.com/en/knowledge?hsLang=en) 2. [Ventilation](https://help.gibraltarbuildingproducts.com/en/knowledge/ventilation?hsLang=en) 3. [Power Fans](https://help.gibraltarbuildingproducts.com/en/knowledge/ventilation?hsLang=en#power-fans) # Can speed controls made by other manufactures be used with Air Vent roof-mount power fans? ## You cannot use speed controls from other manufacturers with Air Vent power fans.  Air Vent motor bearing products have a UL approval based on the power supply of 110 to 120V with sufficient amperage to operate the motor at full speed. The concern with modifying the motor speed has to do with the insulation class rating of the motor. 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