Hot Water Tank Sizes And Capacity

Storage tank hot water heaters are sized based on btu input and capacity in gallons.

Hot water tank sizes and capacity. This tank size based on the scenario in step 2 is adequate for the peak hourly hot water. The energyguide label lists the first hour rating in the top left corner as capacity first hour rating. 3 4 people you ll need at least a 50 gallon capacity tank electric or a 40 gallon capacity tank natural gas or liquid propane. 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.

Choose a hot water heater with a tank size in the range of 50 to 60 gallons on the fhr label. Specifying the size of domestic hot water cylinders and tanks is a little easier to determine as the demand tends to be more predictable. Split systems which store the hot water in an external tank are generally favoured over thermosiphon systems for households with a bigger demand for hot water. For a tank style heater household size is a simple indicator of hot water needs.

As a rule of thumb households with a higher demand for hot water will need to install more or larger solar collector panels or evacuated tubes on the roof. We recommend sizing the cylinder depending on the number of bedrooms bathrooms and showers. You can estimate the necessary tank capacity in gallons based on the number of people in the house.