What Size Tankless Water Heater Do I Need To Replace A 40 Gallon Water Heater

Instead they heat it as it s needed.

What size tankless water heater do i need to replace a 40 gallon water heater. How to size a tankless water heater. If you want to upgrade your water heater size from 40 or 50 gallons storage water heater or replace it you won t necessarily need a big tankless water heater. A tankless heater has a flow sensing device that is activated whenever a hot water tap is opened. Simply locate the appropriate water heater sizes on ecomfort using your information.

The first factor in choosing a tankless water heater is calculating the size of your hot water heater. A low flow shower head may use 1 5 gallons of hot water per minute or gpm as it is called. Tankless water heater efficiency is determined by the water flow rates inside your home. Choose the right tankless electric water heater for you.

Tankless water heaters as their name suggests heat water on demand and do not maintain a supply of water. Rheem tankless electric water heaters make it easy to enjoy instantaneous continuous hot water space saving design and significant energy cost savings. The right size is a tankless water heater that can heat enough gallons of water to a specific temperature per minute to keep up with the demand. If you do the math for 50 temperature rise you need approximately 25 000 btu s per hour per gpm of water required which doesn t take heater efficiency into account but gives a good idea of the size of high efficiency heater needed.

Tankless water heaters do not store hot water. How tankless water heaters work. Once you have your total flow rate and the required temperature rise you can find the right size tankless water heater for your home. Tankless water heaters also known as demand type on demand or instantaneous water heaters heat water directly without the need to store water.

Therefore to size a demand water heater you need to determine the flow rate and the temperature rise you ll need for its application whole house or a remote application such as just a bathroom in your home. Below we ve highlighted what size water heater you would need in our example of 6 5 gpm at a 63 f temperature rise. Just follow the three simple steps below to choose the right model and size you need. The unit then heats the water using either a gas burner or an.

A tank style water heater expends energy around the clock to maintain the temperature of a 40 to 50 gallon water supply so that hot water is ready when it s needed.