The double diaphragm provides an internal safety mechanism and enhances the balanced valve effect

Will this fan blade fit other unit heater brands

It ensures the power exhauster is generating sufficient vacuum before allowing the ignition sequence to proceed

ensuring stable operation in demanding electrical environments

Robust Construction: Features a corrosion-resistant stainless steel sheath sensor for long-term deployment in harsh HVACR environments

Allanson Transformers 2721-411 Transformer Els PW 17895 The double diaphragm provides anThe Allanson 2721 411 Ignition Transformer is a heavy duty oil burner transformer engineered for high demand residential and commercial heating applications. Specifically designed as a drop in OEM replacement for ABC and Sunray burner systems, this unit ensures reliable arc stabilization and consistent ignition cycles. Operating on a 120V AC primary supply, it generates a robust 10,000V secondary output at 23mA, providing the high voltage discharge