Field-Reversible Rotation: Simplifies installation by allowing the rotary actuator to be mounted for either clockwise or counterclockwise action without additional parts

ensuring your burners fire at the manufacturer-specified BTU input

Enhanced Moisture Control: Restores efficient HVAC drainage to prevent microbial growth and indoor humidity spikes

the 621721 is the official direct replacement motor for the 621721R and 6217210 models

This 120V SPDT timer features a robust 21 Amp resistive rating

MAMAC Systems HU-226-2-MA-7 Transducer 320720-756 Field-Reversible Rotation: Simplifies installation byThe MAMAC Systems HU 226 2 MA 7 is a contractor grade duct humidity and temperature transducer engineered for high performance HVAC and building automation systems. Built with a bulk polymer capacitive sensing element, this unit delivers a consistent 2% relative humidity accuracy across a 0 100% RH range. It integrates a 10,000 Ohm NTC thermistor (Type III) for precision temperature monitoring, providing a dual point sensing solution in a single duct