Lennox WHGS030T35PAXS****

The figure of 185 therms is not a metered reading. This site computed it from the registry's UEF, the ratio of hot water delivered to energy used, and the DOE test's daily hot-water draw. The UEF listed for this model is 0.6. The figure applies only to the medium draw pattern and to natural gas. A home that draws more or less hot water than the test will use a different amount. The registry data give no way to adjust for that. The energy source is DOE CCD, retrieved 2026-09-19. The methodology page explains how the annual cost is calculated.

Among the 288 models registered as a gas tank at the medium draw pattern, this unit ranks 89th lowest for energy use. Its 185 therms equals the class median of 185 therms, so the difference is 0 therms. That places it in the second-lowest quarter of its class. The comparison covers energy use only. It suits a household whose hot-water use resembles the test draw and who wants energy use at the class median. The first hour rating, the gallons of hot water available in the first hour from a full tank, is 72 gallons, with a rated volume of 29 gallons. A household that needs more hot water in one busy hour should check that rating against its own peak use. The water heater selector filters by fuel, space and size.

The running cost depends on the state average residential gas price, so this page states no amount. The cost calculator applies the price for the reader's ZIP to 185 therms. The result holds only at the medium draw pattern and for natural gas. A reader who needs a figure for another draw pattern will not find one here, because it is not available. An installed price range is not published for this model. Its ratings of 72 gallons first hour rating and 29 gallons rated volume lie outside the range the cost database's model was fitted on. That range is not stretched past its limit. To look for a same-class unit, find a replacement by model number and start from WHGS030T35PAXS****.