The first consideration is the size of the hot water tank. Obviously larger houses will have larger tanks. When selecting the size of the hot water tank, a simple rule. Is your water heater the right size for you house? | Photo credit ENERGY STAR®. A properly sized water heater will meet your household's hot water needs. To select the right State water heater for your home, try our Xpert product selector For Commercial Sizing applications, we have developed StateSize, a robust. However, to create a more accurate measurement we need to add in the amount of energy required to heat the water in the hot water tank whilst not disrupting the hot water for the central heating system note that this does not apply for combi-boilers which have no hot water tank needs. Forgotten password Please enter spiele unter freunden email address to help us locate your BUILD account. Go to the Xpert Tool. Without going into calculations, it can be estimated through mathematical formulae that not having insulation on piping can create losses of up to Wh per annum. Already got a BUILD account? Contractor Locator Product Selector Wholesalers Why Partner With Us?