and WeatherKing gas furnaces across residential and commercial applications

This technician-grade replacement board (Revision R) is the direct superseding part for legacy numbers 626421

Engineered with a 1-1/4" Female NPT inlet and a 1-1/2" Female NPT outlet

agricultural heaters

70 Cv flow coefficient

Armstrong International B2721 Contactor Refrigerant and WeatherKing gas furnaces acrossThe Armstrong International B2721 is a high performance 50 Amp Contactor designed specifically for heavy duty industrial and commercial humidification systems. Engineered for precision and longevity, this replacement HVAC contactor serves as a critical component in managing power distribution for Armstrong steam humidifiers. It is fully compatible with EHU 600, EHU 601, EHU 602, EHU 701, EHU 703, and EHU 704 models, as well as the HC Series