What Size Electric Tankless Water Heater Do I Need For My House

Tankless water heaters are rated by the maximum temperature rise possible at a given flow rate.

What size electric tankless water heater do i need for my house. Just follow the three simple steps below to choose the right model and size you need. 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. For example an electric tankless heater that is rated at raising the water temperature 55 degrees at 1 5 gpm will supply you with a 120 degree temperature if the incoming water is 65 f or higher.

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. We currently utilize a 60 gallon electric tank heater that seems adequate to our needs. 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. Now that this family can answer the question what size electric tankless water heater do i need they just need to pick a good tankless water heater.

Tankless water heaters do not store hot water. Flow rate is the key spec when sizing a tankless water heater o brian says. I ve been boiling water inside a kettle so i ll have some hot water to use in my bathtub when i m bathing but i find that it s time consuming to do that. Angela waterford january 8 2020 at 4 11 pm.

Below we ve highlighted what size water heater you would need in our example of 6 5 gpm at a 63 f temperature rise. I live in canada my high gpm demand would be around 7 8gpm inlet water temp around 37f in coldest months would it be viable for me to install an electric tankless heater. Instead they heat it as it s needed. One option would be the rheem rtgh 95dvln 9 5 gpm indoor direct vent tankless natural gas water heater.

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. Once you have your total flow rate and the required temperature rise you can find the right size tankless water heater for your home. 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. 2 comments on what size water heater do i need for my house.