What Size Tankless Water Heater Do I Need For A Family Of 2

In short a family of 5 would need a 10 gpm gas tankless heater or 27 kw electric tankless heater if you live in the northern part of the usa where the input water has a lower temperature.

What size tankless water heater do i need for a family of 2. Therefore before purchasing a water heater make sure it s the correct size. Here you ll find information about how to size these systems. The answer is simple. You ll need a tankless water heater that can provide a temperature rise of 50 f for about 6 gallons of water per minute.

What size water heater do i need. So i need to know what size tankless water heater is best for a family of 4. How to size a tankless water heater. A properly sized water heater will meet your household s hot water needs while operating more efficiently.

1 2 people you ll need a water tank with at least a 30 gallon capacity. 2 3 people you ll need at least a 40 gallon capacity tank. Therefore to size a demand water heater you need to determine the flow rate and the temperature rise you ll need for its application whole house or a remote application such as just a bathroom in your home. For example if your peak usage occurs after dinner when you re running the dishwasher and taking a shower at the same time 3 gpm 2 5 gpm you ll need a tankless water heater with a.

Once you have your total flow rate and the required temperature rise you can find the right size tankless water heater for your home. It is listed as being 9 8gpm but since my factors are not the best case scenario it drops down to 6 7 gpm. While traditional tank water heaters are calculated by your family size a tankless water heater is calculated by the quantity and types of fixtures or appliances it will serve. Solar water heating system.

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 re going with a storage tank water heater here s a rough guide for storage tank capacity. Simply locate the appropriate water heater sizes on ecomfort using your information. Tankless or demand type water heaters.

Looks like the rinnai ruc98in from amazon is going to be best to suit my needs. There the tankless heater has to work extra hard to bring the water temperature up to 110 f or 120 f. The best gas option in this case would probably be rinnai v series. How big of a tankless water heater do i need.