Typical Water Heater Size

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.

Typical water heater size.

Sizing storage and heat pump with tank water heaters. If you want help calculating what size water heater your family needs or need more information about the pros and cons of a tankless water heater contact us at the plumbing source. To determine the water heater flow rate needed you ll want to add up the flow rates of all the appliances you plan to use at the same time showers washing. Consequently these are the two most frequently installed sizes.

Sink faucet 1 gpm bathtub 3 gpm shower 2 5 gpm dishwasher 3 gpm clothes washer 3 gpm. However every family has different water demand requirements. Typically residential water heater sizes range from 40 to 100 gallon tanks. Since tankless water heaters don t store water you don t have to worry about capacity size.

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. Usually most homeowners find that either a 40 or 50 gallon hot water tank is the best fit for their needs. Flow rate and temperature rise. We ll go over the math with you and make sure you find a hot water heater that s the perfect size for your family.