Honeywell SV9520M2536?áSmartVale, Direct Hot Surface Ignition, 24Vac, 4 Trial To Lockout, 1/2 Psi Pressure Rating, 1/8" NPT Pressure Tapping, Standard Opening, 1/2"x1/2" NPT, 3.5"wc Regulator Setting, -40-175 Degree Ambient Temperature Range, 7 Second Ignition Trial Time, Includes LP Conversion Kit

SV9520M2536 is identical to SV9520M2536/U