Water Heater Size Calculator

It depends on the tank capacity source of heat burner or element and the size of the burner or element.

Water heater size calculator. Getting a heater that is too small will create havoc in your household but getting a heater that is too big will cause you to waste money on the initial purchase and costs to keep all of that water hot 24 hours a day 365 days a year. Smith pro size sizing program is a tool that can be used to estimate water heater requirements for many common applications. It is the sole responsibility of the system designer to select the correct products needed for the specific application. A water heater s first hour rating fhr is the most important feature to.

Below we ve highlighted what size water heater you would need in our example of 6 5 gpm at a 63 f temperature rise. Simply locate the appropriate water heater sizes on ecomfort using your information. Tankless water heater sizing calculator use our sizing calculator to determine your. Tankless water heater sizing calculator.

Flow rate and temperature rise where are you located. Knowing your family s first hour water usage will help you get the right size heater. Click on the map below to. Pro size is intended to assist in selecting water heaters or boilers that best meet the specific job requirements.

You can estimate the necessary tank capacity in gallons based on the number of people in the house. Tankless electric water heater sizing tool. Just follow the three simple steps below to choose the right model and size you need. Rheem tankless electric water heaters make it easy to enjoy instantaneous continuous hot water space saving design and significant energy cost savings.

Hybrid tankless water heaters. Before we get to how to use the calculator to size a tankless water heater let s talk about the factors that go into understanding what size inline water heater you need. Direct vent furnaces venting. Now you need to understand what temperature rise means.

We already covered gpm. Find the right water heater where to buy rebate finder. Choose the right tankless electric water heater for you. Once you have your total flow rate and the required temperature rise you can find the right size tankless water heater for your home.

To properly size a storage water heater for your home including a heat pump water heater with a tank use the water heater s first hour rating. Temperature rise is how you will figure out what the actual gpm that the tankless water heater is. Its evident from this chart that a family of 5 which is very common in the us requires a 56 80 gallon size water heater. The first hour rating is the number of gallons of hot water the heater can supply per hour starting with a tank full of hot water.