Tankless Water Heater Size Requirements

Tankless water heaters are much smaller than units with a storage tank allowing them to be wall mounted.

Tankless water heater size requirements.

Once you have your total flow rate and the required temperature rise you can find the right size tankless water heater for your home. How to determine the required size of a tankless hot water heater. You ll need a tankless water heater that can provide a temperature rise of 50 f for about 6 gallons of water per minute. The best gas option in this case would probably be rinnai v series.

The answer is simple. A wide range of sizes and capacities of demand type water heaters are available so indeed it makes sense to look carefully at your requirements. Determine your water flow rates. Measure your cold water temperature.

Simply locate the appropriate water heater sizes on ecomfort using your information. Remember the maximum flow rate that manufacturers mention in the description is not what you ll get at your place. You may not need that big of a tankless water heater so make sure you read the whole article. Temperature rise at 3 gpm.

Your tankless water heater will need to be able to provide a 60 deg. Determine the maximum number of devices you want to run and their total flow rate. Below we ve highlighted what size water heater you would need in our example of 6 5 gpm at a 63 f temperature rise. Gallons per minute gpm is the key when it comes to sizing tankless water heaters.

Determine the mounting space.