The ProLine® XE power vent Gas Water Heater is engineered to maximize efficiency, while offering greater flexibility in installation option. Featuring a 50 gal (nominal) tank and a 40000 Btu/hr propane burner, the GS6-50-HBVIS power vent deliver a first hour rating of 79 gal and a recovery rate of 44.72 gph. With an 0.72 Uniform ENERGY FACTOR®, this water heater is ENERGY STAR® certified. It carries a 6 years limited warranty and meet Low NOx emission requirement.