As a primary HVAC blower control switch

is a critical component for maintaining precise system capacity control in HVACR applications

Compact Stack Design: Features a 1-inch iron stack for high power density in tight evaporator configurations

extending the service life of boiler trim components

OEM Compatibility: Precision-fit for Heil

Resideo AT87A1106 Transformer 321702-401 As a primary HVAC blowerThe Resideo AT87A1106 Transformer is a heavy duty 48VA transformer engineered for multi tap versatility in commercial and residential HVACR service. Built to handle 120V 208V 240V primary input, this Super Tradeline component drops voltage to a stable 26. 5V secondary (24. 0V nominal under load), making it a reliable choice for powering 24V control circuits, contactors, and high draw zone systems. The unit features NEMA Type E construction and