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.
What is the right size water heater for a family of 4.
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.
The good news is that just by following a few guidelines you can find the perfect size water heater.
If your family size is 5 or more you ll need an 80 gallon tank electric or a 50 gallon tank natural gas or liquid propane.
This is because water heater size directly impacts its cost.
Before buying a tank water heater most homeowners want to get a rough idea of the water heater size their family needs.
But it shouldn t be your.
We ll go over the math with you and make sure you find a hot water heater that s the perfect size for your family.
30 40 gallons for 2 to 3 people.
That s the measure of how much hot water the heater will deliver during a busy hour such as first thing in the morning.
Family of 1 2.
If you intend to use a tank water heater use these recommendations as a guide to finding the size you need.
Before finding the right size water heater you must determine which type you re going to purchase.
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.
Minimum gallon capacity recommendations.
The bigger the water heater tank the more expensive it will be.
Determine the home s fhr or first hour rating.
If you want help calculating what size water heater your family needs or need more information about the pros and cons of a tankless water heater contact us at the plumbing source.
But if you only need a loose estimate of what size you need versus an exact calculation follow these guidelines.
Smith s proline power vent gas water heater available from supplyhouse should get the job done.
Sizing storage and heat pump with tank water heaters.
30 gallons family of 2 3.
Below we ve highlighted what size water heater you would need in our example of 6 5 gpm at a 63 f temperature rise.
40 gallons family of 3 4.
How to determine the size of a water heater tank.
50 gallons family of 5 or more.
Tankless water heaters are rated by the maximum temperature rise possible at a given flow rate.
For the average family of four a 40 gallon water heater like a.
Well to get an accurate answer you d have to calculate out how much hot water you typically use during your busiest hot water using hour.