Opti-Therm 100 gall/199.9 MBH/NG Fully modulating, 76 MBH to 199.9 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. # 55735 | B2B Storefront