The ProLine® XE power vent Gas Water Heater is engineered to maximize efficiency, while offering greater flexibility in installation option. Featuring a 40 gal (nominal) tank and a 40000 Btu/hr propane burner, the GS6-40-HBVIS power vent deliver a first hour rating of 73 gal and a recovery rate of 44.67 gph. With an 0.67 Uniform ENERGY FACTOR®, this water heater is ENERGY STAR® certified. It carries a 6 years limited warranty and meet Low NOx emission requirement.