40 gallon, natural gas, short power vent water heater, energy star qualified, 40,000 btu, 3 position rotatable capability blower, 120v power cord, must be electrically grounded, horizontal & vertical vent runs up to 180 equivalent feet with 4" diameter venting, schedule 40 vent piping system with pvc, abs or cpvc pipe, vent distance up to 180' with 4" pipe, 2" insulation, self-cleaning diffuser end pex dip tube, glass lining, hot surface igniter, no standing pilot, first hour rating 73, recovery at a 90 degree rise gph 44.7, uef: 0.67, ef: 0.70, aluminum anode rod, installed t & p relief valve, electronic gas control for more precise temperature control, unit dimensions : 59" height to top of blower by 22" diameter, 6 year tank & parts limited warranty, 1 year labor allowance not for mobile/manufactured housing, void if installed in mobile/manufactured home, 174 lb, up to 10,100' elevation.