this Honeywell-manufactured gas valve offers the reliability required for mission-critical domestic hot water and hydronic heating applications

High Efficiency: 1/3 HP ECM motor reduces electrical overhead and lowers utility costs

The SPDT (Single Pole Double Throw) switch mechanism is housed in molded UV-resistant plastic with a rugged aluminum cover

Replacing a single-speed unit with a two-speed model requires specific control board logic and wiring harnesses that are not present in single-stage systems

which utilize LED error codes to streamline troubleshooting in the field

Neptronic SHS80-300 Humidistat 321702-401 this Honeywell-manufactured gas valve offersThe Neptronic SHS80 300 serves as a high precision duct mount humidity high limit switch, engineered specifically for monitoring and controlling relative humidity in supply or return air ducts. This dual function device operates as a 0 10 Vdc humidity transmitter while providing critical on off high limit protection for modulating humidifiers. Designed with a robust ABS plastic enclosure, it features an on board setpoint adjustment range of 20% to 90%