How do you determine how large a storage tank water heater you need for a home? The sizing job is something you’ll need to have an expert plumber handle, but the basics of sizing this type of water heater is something anybody can understand: the more hot water demand there is in the house (usually because of the number of people in the household), the larger the storage tank itself needs to be.
But what if you’re planning to install a tankless water heater for your house? As the name indicates, a tankless water heater doesn’t have a storage tank at all. Instead, it applies heat to water as it moves through the unit via a heat exchanger. The water is heated as it is needed (or “on-demand,” which is another name for this type of water heater). So, does this mean there isn’t any need to size a tankless water heater because one size fits all?