119-gall, 398MBH, Nat Gas, *ASME* modulating-Tank Hybrid System, vertical double-engine, 1-1/2" Gas, 1-1/2" Inlet/Outlet connect, 2"/3" Direct Vent, PowerVent, Common-vent (up to 8-units), 459GPH recovery @ 100*^ T, 8yr warranty on HX, 6yr storage tank, 5yr parts | B2B Storefront