AO Smith ProLine Master 50-Gallon Power Vent Gas Water Heater (GPDH-50)
AO Smith ProLine Master 50-Gallon Power Vent Gas Water Heater (GPDH-50) Review
The AO Smith ProLine Master 50-Gallon Power Vent Gas (GPDH-50) is a power-vented gas tank in A.O. Smith's mainstream residential line. The "Power Vent" feature uses an integrated fan to push exhaust horizontally through PVC piping out a side wall, eliminating the need for a chimney.
Specs: 50 gallons stored, 40,000 BTU input, UEF 0.66 (slightly higher than atmospheric due to better combustion control), 84-gallon first-hour rating, 6-year tank and 6-year parts warranty. ENERGY STAR certified.
The power-vent configuration is for installations where atmospheric venting through a chimney isn't practical — basements with failed chimneys, utility room conversions without chimney access, or new construction preferring side-wall venting. The horizontal PVC venting adds about $200-$500 to install cost over atmospheric but eliminates chimney dependency.
The "Pro Line Master" designation reflects A.O. Smith's plumber-channel positioning. Plumbers ordering through wholesale distributors receive ProLine Master at trade pricing. For DIY purchases, the equivalent product is the A.O. Smith ProMax Power Vent at Lowe's.
About $899 plumber-channel pricing, $1,800 plumber-installed (including venting work). Right buyer: install location without chimney access, especially basement conversions and additions.