iPower 4 in. 230 CFM Inline Duct Ventilation Fan with 350-Watt Variable Speed Controller for Grow Tent, Upgrade Version Black GLFNINLLTEVOCR4 - The Home Depot
1700-2500 CFM Standard Direct Drive Upblast Exhaust Fan with Speed Controller (.75 HP / 208 V / Single Phase)
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iPower 12 inch Variable Shutter Exhaust Fan Aluminum with Speed Controller Kit, 1620RPM, 940 CFM, Silver - Walmart.com
DIGITEN Variable Speed Controller Exhaust Variable Speed Fan Speed Adj
Plug In Fan Speed Control for Exhaust Fans from ACF Greenhouses
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Industrial Wall Mounted Extractor Fan 12" Commercial Ventilation +Speed Control 5060915660169 | eBay
HVACQuick - S&P Fan Speed Controllers Thermostats and Timers
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