Tankless Water Heater Size Requirements

Measure your cold water temperature.

Tankless water heater size requirements.

Temperature rise at 3 gpm. How to determine the required size of a tankless hot 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. You ll need a tankless water heater that can provide a temperature rise of 50 f for about 6 gallons of water per minute.

Determine the maximum number of devices you want to run and their total flow rate. Simply locate the appropriate water heater sizes on ecomfort using your information. 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. How to select the right size tankless water heater.

Remember the maximum flow rate that manufacturers mention in the description is not what you ll get at your place. Determine the mounting space. 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. Gallons per minute gpm is the key when it comes to sizing tankless water heaters.

You may not need that big of a tankless water heater so make sure you read the whole article. Once you have your total flow rate and the required temperature rise you can find the right size tankless water heater for your home. Determine your water flow rates. The answer is simple.

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