Tankless Gas Water Heater Sizes

Determine your water flow rates.

Tankless gas water heater sizes.

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. Like a hot water tank for 5 people will require at least a 60 gallon tank. 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. How to determine the required size of a tankless hot water heater.

Rinnai super high efficiency plus 9 8 gpm indoor natural gas tankless water heater. Below we ve highlighted what size water heater you would need in our example of 6 5 gpm at a 63 f temperature rise. 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. 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.

Gallons per minute gpm is the key when it comes to sizing tankless water heaters. Simply locate the appropriate water heater sizes on ecomfort using your information. You ll need to raise the incoming water temperature from 40 degrees to 105. Measure your cold water temperature.

Looking to purchase a new tankless water heater but having trouble figuring out what size or model you need. You ll need to be able to heat at least 5 2 gallons of water. Use our handy calculator to determine your needed flow rate and temperature rise then find models that match your needs. Rheem tankless electric water heaters make it easy to enjoy instantaneous continuous hot water space saving design and significant energy cost savings.

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. Just follow the three simple steps below to choose the right model and size you need.