Tankless Water Heater Size Requirements

Determine the maximum number of devices you want to run and their total flow rate.

Tankless water heater size requirements. The answer is simple. Tankless water heaters are much smaller than units with a storage tank allowing them to be wall mounted. Simply locate the appropriate water heater sizes on ecomfort using your information. How to determine the required size of a tankless hot water heater.

The best gas option in this case would probably be rinnai v series. Then add up their flow rates gallons per minute. Remember the maximum flow rate that manufacturers mention in the description is not what you ll get at your place. Below we ve highlighted what size water heater you would need in our example of 6 5 gpm at a 63 f temperature rise.

Determine the mounting space. 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 lowest price you can get for the highest gpm is easily the takagi t h3 dv n that will give you a whopping 10 gpm. Once you have your total flow rate and the required temperature rise you can find the right size tankless water heater for your home.

Temperature rise at 3 gpm. Measure your cold water temperature. How to select the right size tankless water heater. You may not need that big of a tankless water heater so make sure you read the whole article.

Determine your water flow rates.