Honeywell SmartValve, Intermittent Hot Surface Ignition Sequence, 24Vac, 90 Second Ignition Trial Time, Continuous Retry, 1/2 Psi Pressure Rating, 1/8″ NPT Pressure Tapping, Standard Two Stage Opening, 1/2″x1/2″ NPT, 1.7″wc Low Regulator Setting, 3.2″wc High Regulator Setting, 15 Second PrePurge, Includes LP Conversion Kit, -40-175 Degree Ambient Temperature Range