Average Residential Water Heater Size

For a tank style heater household size is a simple indicator of hot water needs.

Average residential water heater size.

Electric units have measurements in the 10 inch high to 7 inch wide range while gas fired. We ll also show you how to calculate the exact water heater size that meets your needs and saves you money. The first hour rating is the number of gallons of hot water the heater can supply per hour starting with a tank full of hot water. If you re going with a storage tank water heater here s a rough guide for storage tank capacity.

To properly size a storage water heater for your home including a heat pump water heater with a tank use the water heater s first hour rating. Typically residential water heater sizes range from 40 to 100 gallon tanks. Below we ve highlighted what size water heater you would need in our example of 6 5 gpm at a 63 f temperature rise. We ll explain why the numbers above are just loose estimates and how they might not accurately meet your hot water needs.

Simply locate the appropriate water heater sizes on ecomfort using your information. 1 2 people you ll need a water tank with at least a 30 gallon capacity. Tankless water heaters are much smaller than units with a storage tank allowing them to be wall mounted. Once you have your total flow rate and the required temperature rise you can find the right size tankless water heater for your home.

2 3 people you ll need at least a 40 gallon capacity tank. You can estimate the necessary tank capacity in gallons based on the number of people in the house.