SUPCO Part Number SSN21 Mini Furnace Igniter Replaces The 75M21 Igniter is used on Lennox® furnaces Replaces P/N 75M2101 Model 697 Used with Lennox G40 and G43 series gas funace Rated for 95 V Time to temperature: 20 Sec. Resistance: 50 to 450 Ohms @ 77°F (25°C) Amp Draw: 0.3 to 0.8A @ 95VAC Nominal Voltage: 95 VAC