Sterling TF125A1NS111 Heater 30067439-890 or chilled water applications within

or chilled water applications within commercial HVAC systems

For the most accurate temperature sensing

The surface-mount housing and 1/4 inch quick-connect terminals ensure a streamlined installation for field technicians replacing legacy or failed HVAC blower timers

this SPST switch should show continuity across the terminals

Contractors should verify the water column rating on the existing failed switch to ensure a 27W17 Lennox cross-reference matches the specific pressure requirements of the heat exchanger

Sterling TF125A1NS111 Heater 30067439-890 or chilled water applications withinThe Sterling TF125A1NS111 is a high efficiency, power vented industrial gas unit heater designed for rugged commercial environments like warehouses and large workshops. This 125,000 BTU gas heater features a heavy duty 20 gauge aluminized steel tubular heat exchanger with a serpentine design that eliminates the stress points found in traditional clamshell models, ensuring long term durability under heavy cycling. Utilizing inshot burner technology and