For technicians performing retrofits or emergency repairs

though it arrives factory-calibrated for immediate deployment in most commercial HVAC applications

When you are servicing Watts Series 909-RV lead-free backflow preventers in the 3/4" and 1" sizes

For damper actuator accessories

facilitating a seamless field installation for HVAC contractors and facilities maintenance crews

Lennox 74N47 HSI Ignitor 30067439-890 For technicians performing retrofits orThe Lennox 74N47 HSI Ignitor is a high performance, OEM grade hot surface ignitor specifically engineered for precision ignition in Lennox gas furnaces and condensing water boilers, including GWB9 series models. As a veteran technician knows, maintaining reliable combustion starts with a fast acting 120V element. This silicon carbide ignitor provides the necessary thermal mass to reach ignition temperatures rapidly, ensuring the gas valve opens to a