Standard Hot Water Heater Size

Pro size is intended to assist in selecting water heaters or boilers that best meet the specific job requirements.

Standard hot water heater size.

Using a tape measure measure the height of your water heater from its base to the top. If you use hot water intensely for short periods of time like taking showers or baths while doing laundry a low capacity water heater might not do the job. This makes these types of water heaters more efficient than traditional storage tank water heaters which could end up reducing your energy bills. 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. Tankless units work by using built in coils to heat water when you need it meaning you ll always have hot water on demand. Look for a sticker on the side of your 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.

As an example an instant hot water heater size for family of 5 would be a 21 litres per minute flow rate vs a hot water tank size for family of 5 would be 230 300l 60 80 gallons. Determine the size of your water heater. Don t opt for a smaller unit thinking that it ll shrink your energy bill. A tankless water heater albeit more expensive upfront will provide you with hot water no matter what.

That s the measure of how much hot water the heater will deliver during a busy hour such as first thing in the morning. The good news is that just by following a few guidelines you can find the perfect size water heater. The amount of water you use will be the same regardless of your water heater size. But if you only need a loose estimate of what size you need versus an exact calculation follow these guidelines.

For 1 to 2 people. This is assuming 3 showers running simultaneously with 3 star water saving shower head. For a tank style heater household size is a simple indicator of hot water needs. Smith pro size sizing program is a tool that can be used to estimate water heater requirements for many common applications.

This is the capacity of your water heater. It should have the serial number and other information as well as the gallon capacity listed. Because a continuous flow system supplies hot water on demand and the hot water is endless the most important thing to consider for these water heaters is flow rate. 1 or 2.

Then measure the width. 30 40 gallons for 2 to 3 people. You can estimate the necessary tank capacity in gallons based on the number of people in the house.