Intermatic FD2HW Timer 328140-751 standard 2BK sheaves are typically

standard 2BK sheaves are typically balanced for common motor speeds found in HVAC applications

Universal Replacement: Standard 11-3/4 x 8 dimensions make it a compatible HVAC blower wheel for a wide range of direct-drive furnace and condenser units

this valve is rated for chilled or hot water applications only

High-Durability Diaphragm: Engineered to withstand the thermal cycling and moisture typical of condensing boiler environments

Intermatic FD2HW Timer 328140-751 standard 2BK sheaves are typicallyThe Intermatic FD2HW is a heavy duty 2 hour spring wound timer engineered for professional grade reliability in demanding HVACR and electrical environments. Designed as a direct, energy efficient mechanical timer replacement for standard decorator style wall switches, this unit operates without the need for a neutral wire or external power source, making it an ideal choice for retrofit applications. It features a robust SPST switch configuration