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Master Flow WHT36 Standard Timer LL Buildsite S30 Fan Shutter LL Buildsite S36N Fan Shutter
Easily installed in standard 2-1/2"D vertically-installed junction box. Spring-wound mechanical dial, open in the off position to permit fan operation from standard pull switch when not in use. Operates with 1 HP motors and standard household current of 115 Volts, 60 Hz, single phase. Includes durable plastic knob and wall plate marked in 2-hour increments. Equipped with continuous-on hold feature. Injection molded frame with smooth aluminum louvers that automatically open when fan turns on, and close when fan turns off to keep out air, insects, and dust. Balanced shutters for complete automatic service-free operation. Installs centered on joist with 18" or 24" centers with 2 cut openings, 1 on each side of center joist per shutter model. 35-3/4"L x 30-1/4"W OD, 33-3/4"L x 28-1/4" W opening. White enamel finish. Replacement shutter for Master Flow 30BWHFS (whole house fan). Injection molded frame with smooth aluminum louvers that automatically open when fan turns on, and close when fan turns off to keep out air, insects, and dust. Balanced shutters for complete automatic service-free operation. Measures 37-3/4"W x 42-1/2"L OD, 40-1/2"L  x 35-7/8"W opening size. Replacement shutter for Master Flow 36BWHFS (whole house fan).
Master Flow WHFS24M Direct Drive Whole House Fan Master Flow 30BWHFS Belt Drive Whole House Fan
Used in place of air conditioning to reduce energy costs in homes over 1,000 sq.ft. Easy-to-wire, 2-speed pull-chain switch for no wiring through walls. Efficient, long-lasting, thermally protected, permanent split-capacitor motor runs at 120 Volts. Balanced aluminum fan-blade assembly for quiet operation. All-metal construction shroud. Pre-assembled and ready for installation. Includes Seal-Tite white aluminum ceiling shutter, installation hardware, plenum boards, and easy-to-follow DIYer instructions. This whole-house fan is installed on the ceiling between the attic and living space. Louvers close when the fan is not operating. UL/UL Canada Listed. 24" measures 27-3/4" x 27-3/4" x 5" overall to vent 2,500 sq.ft. Used in place of air conditioning to reduce energy costs in homes over 1,000 square feet. 2-speed wall switch for convenient operation. Permanently lubricated center shaft ball bearings. Belt-driven by die-cast pulleys to isolate noise and vibration for quieter operation. Efficient, longer-lasting, thermally protected, permanent split-capacitor motor runs at 120 Volts. Balanced aluminum fan-blade assembly for quiet operation. Sturdy metal frame, pre-assembled 1" x 3" wood frame. Includes automatic Seal-Tite white aluminum ceiling shutter, installation hardware, plenum boards, and easy-to-follow DIYer instructions. This whole-house fan is installed on the ceiling between the attic and living space. Louvers close when the fan is not operating. UL/UL Canada Listed. 34" x 34" x 11" overall to vent up to 3,000 sq.ft. This whole-house fan is installed on the ceiling between the attic and living space. The louvers close when the fan is not operating.
   
 
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