Stream 33 MGWH199IXNN

The 178 therms figure is computed by this site, not taken directly from the registry. It combines the registry's UEF, the ratio of hot water delivered to energy used, with the DOE test's daily hot-water draw at this pattern. For this model the UEF is 0.95, and the fuel is natural gas. The figure holds only at that federal test draw; a household drawing a different amount of hot water would see a different figure. The source is the DOE CCD, retrieved on 2026-09-19. The site's methodology page explains how the annual cost is calculated from this energy figure.

The high draw pattern stands for a larger household, or one where showers and laundry overlap. That is the use this 178 therms figure describes, so it fits a check for that kind of home. The model's maximum flow rate in gallons per minute is 5.7, which sets how much hot water it can deliver at once. Its rank among the 397 models, given above, places it in the lowest quarter of its class for energy use. The rank compares energy use only; it says nothing about flow rate or other features. Anyone confirming a model can look up same-class replacements by model number.

The 178 therms figure does not describe a smaller household that draws less hot water than the high pattern assumes. A figure for this model at a lower draw pattern is not available in this data, so none is given. Running cost is also not stated in this text. It depends on your state's average residential gas price, so the page computes it from your ZIP. The cost calculator on your own ZIP applies that rate to the 178 therms of natural gas a year. The installed price range appears in its own block, with its source and date, as a modeled range rather than a quote.