Tankless Gas Water Heater Sizes

Choose the right tankless electric water heater for you.

Tankless gas water heater sizes.

Just follow the three simple steps below to choose the right model and size you need. So you ll need a tankless water heater that can produce at least a 60 degree rise in temperature at 5 2 gallons per minute. Like a hot water tank for 5 people will require at least a 60 gallon tank. Use our handy calculator to determine your needed flow rate and temperature rise then find models that match your needs.

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 are much smaller than units with a storage tank allowing them to be wall mounted. Gallons per minute gpm is the key when it comes to sizing tankless water heaters. How to determine the required size of a tankless hot water heater.

Determine your water flow rates. Rinnai tankless water heaters are designed to provide maximum performance and efficiency using either a 3 4 or 1 2 gas line as long as sufficient gas flow is available. You ll need to raise the incoming water temperature from 40 degrees to 105. Below we ve highlighted what size water heater you would need in our example of 6 5 gpm at a 63 f temperature rise.

Looking to purchase a new tankless water heater but having trouble figuring out what size or model you need. Measure your cold water temperature. Since tankless water heaters supply endless hot water you don t have to worry about capacity but instead think in terms of water flow rate. 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.

Determine the mounting space. You ll need to be able to heat at least 5 2 gallons of water. Simply locate the appropriate water heater sizes on ecomfort using your information.