Tankless Gas Water Heater Sizes

Rinnai super high efficiency plus 9 8 gpm indoor natural gas tankless water heater.

Tankless gas water heater sizes.

Simply locate the appropriate water heater sizes on ecomfort using your information. 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. Below we ve highlighted what size water heater you would need in our example of 6 5 gpm at a 63 f temperature rise. 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.

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. Gallons per minute gpm is the key when it comes to sizing tankless water heaters. Just follow the three simple steps below to choose the right model and size you need.

Measure your cold water temperature. Determine the mounting space. Tankless water heaters are much smaller than units with a storage tank allowing them to be wall mounted. Choose the right tankless electric water heater for you.

Determine your water flow rates. 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. How to determine the required size of a tankless hot water heater. 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 be able to heat at least 5 2 gallons of water. You ll need to raise the incoming water temperature from 40 degrees to 105. Looking to purchase a new tankless water heater but having trouble figuring out what size or model you need.