What Size Tankless Water Heater Do I Need For 2 Bathrooms

Simply locate the appropriate water heater sizes on ecomfort using your information.

What size tankless water heater do i need for 2 bathrooms. What size water heater do i need. For example if you are running 2 showers at the same time you will need 5 gallons of hot water per minute from the tankless water heater. 2 3 people you ll need at least a 40 gallon capacity tank. Tankless water heater efficiency is determined by the water flow rates inside your home.

Below we ve highlighted what size water heater you would need in our example of 6 5 gpm at a 63 f temperature rise. Apart from size the other factor that determines the functionality of the tankless water heater is the size. There are many factors that impact the size of tankless water heater you should choose including how many people are in your home or office and how many facilities bathrooms washrooms laundry rooms or kitchens the unit will service. If you want a normal 105 degree shower that means you have a 58 degree temperature rise 105 47 58.

1 2 people you ll need a water tank with at least a 30 gallon capacity. To simplify the process we have a handy three step formula for choosing what capacity of rinnai tankless water heater will work best for your needs. As a result you need to look at the tankless water heater s gpm flow rating based on a 58 degree temperature rise. Let s continue our example with a popular product the bosch 1600p ng tankless water heater.

If you were running a shower and the washing machine at the same time you would need 4 5 gallons per minute from the water heater. 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. But just to give you a starting point for further research if you you have a 2 bathroom house or 2 bedroom house and you want to run 2 showers simultaneously you will need a tankless water heater that can provide at least 5 gallons of hot water per minute. In general gas tankless water heaters can heat up to 5 gallons of water up to 70 degrees fahrenheit in one minute while electric tankless water heaters can heat only 2 gallons of water to 70 degrees fahrenheit within the same time.

Once you have your total flow rate and the required temperature rise you can find the right size tankless water heater for your home.