30 40 gallons for 2 to 3 people.
Average water heater size gallons.
A tankless water heaters flow rate should be equal to your family s peak demand.
But if you only need a loose estimate of what size you need versus an exact calculation follow these guidelines.
Small storage tank water heaters known as point of use or utility water heaters are good choices for adding hot water to outbuildings shops or garages.
3 4 people need a 40 50 gallon water heater.
For a tank style heater household size is a simple indicator of hot water needs.
If you re going with a storage tank water heater here s a rough guide for storage tank capacity.
Assuming your water temperature is 40 coming into your home and you want to produce enough hot water to run 2 showers at the same time what temperature rise would you need to produce to accomplish this.
Choose a hot water heater with a tank size in the range of 50 to 60 gallons on the fhr label.
For 1 to 2 people.
In this instance you would need a water heater with a first hour rating of at least 72 gallons before you run out of hot water during that 1 hour period.
2 3 people you ll need at least a 40 gallon capacity tank.
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.
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.
However every family has different water demand requirements.
1 2 people you ll need a water tank with at least a 30 gallon capacity.
This tank size based on the scenario in step 2 is adequate for the peak hourly hot water requirements.
Usually most homeowners find that either a 40 or 50 gallon hot water tank is the best fit for their needs.
Utility water heaters usually range in size from 2 5 to 19 gallons.
To determine what size tankless water heater.
5 or more people need a 50 80 gallon water heater.
Tankless water heaters capacities aren t measured in gallons stored but in flow rates.
What size water heater do i need.
An average shower will be between 104 106 and uses 2 6 gallons of water.
You can estimate the necessary tank capacity in gallons based on the number of people in the house.
Sizing storage and heat pump with tank water heaters.
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.
Typically residential water heater sizes range from 40 to 100 gallon tanks.
