GEN 2 - Opti-Therm 125 gall/300 MBH/NG Fully modulating, 135 MBH to 299.9 MBH condensing water heater Lifetime cathodic protection system, NO sacrificial anodes, PVC/CPVC Power Vent or Power Direct vent, 5-yr tank warranty, ASME tank. # 55660-2 | B2B Storefront