The unit includes a self-recharging NiMH battery backup that maintains your scheduled programming and time-of-day for over 100 days (2

Key Benefits Direct OEM Fit: Ensures perfect alignment with 1/2" NPT gas lines without the need for complex piping modifications

while the 500:1 rangeability allows for granular modulation across various load conditions

and damper proving circuits

When replacing this combustion fan

Lochinvar & A.O. Smith 100208448 Relief Valve R-22 The unit includes a self-rechargingThe Lochinvar & A. O. Smith 100208448 Relief Valve is a critical boiler and water heater safety component designed for precise overpressure protection. This heavy duty 1 inch NPT inlet valve features a 1 1 4 inch outlet and is factory calibrated to a 50 PSI set pressure. Engineered for high recovery commercial and residential hydronic systems, it effectively prevents vessel failure by automatically discharging excess pressure when system limits are