you must match the 825 RPM motor speed

and RFCX families

to ensure correct airflow orientation in furnace blower assemblies across Heil

Where should the sensing element be located

Resideo TH135-01-B Thermostat 318973-401 you must match the 825The Resideo TH135 01 B is a contractor grade non programmable thermostat engineered for precise 1 heat control in hydronic heating and low voltage forced air systems. Operating on a 24Vac or 24Vdc power supply, this electronic unit features a high density vertical mount design, making it an ideal retrofit for aging mechanical thermostats. It utilizes a thermistor sensing element to maintain 1F temperature accuracy, significantly reducing temperature