What size water heater do you need in your home?

If you are looking to have a water heater installed in your home, you want to make sure that it heats your water effectively and efficiently. As you can imagine, the needs of each household are different; so how do you know what size of water heater you need for your home?

It’s always worth speaking to professionals, such as plumbingdetectives.com.au about a water heater for your home. They have plenty of experience in the area and can help you choose the right size water heater for your needs. In the meantime we are going to give you some tips on how to choose the right size water heater.

Tankless water systems

If you have a tankless water system in your home then you need to know the flow rate and the required temperature rise in order to determine which is the right water heater for you. Working out the flow rate for your home involves determining which separate hot water devices you are likely to use at once and adding up all of their flow rates (the amount of gallons per minute). This total is the flow rate you will need to achieve from a water heater.

Working out the temperature rise involves subtracting the temperature of the incoming water from the required output temperature. To give you an idea of the flow rate and temperature rise you can achieve from a water heater in a tankless system, you will normally be able to get a 39ºC temperature rise at a five gallons per minute flow rate from a gas powered heater and the same temperature rise at a two gallons per minute flow rate from a heater powered by electricity.


Water systems with a tank

In order to work out what size heater you need for a water system with a tank you need to know how much hot water the heater can supply per hour, this is from a starting point where the tank is full of hot water. The amount of water the heater can produce depends on considerations such as the size of the tank and the way in which the water is heated.

You should be able to check the amount of water that can be heated in guidelines from the manufacturer of the heater. In order to determine if a heater is right for you it’s important that you know how much hot water you need at peak times. You should work this out by determining what sources of water usage there are during the peak hour, such as a shower or a dishwasher. You then need to determine the average number of gallons used by each source in an hour and how many times the source will be used. Multiplying all of these figures together will show you the total number of gallons of hot water you need during the peak hour of usage. You should purchase a water heater that is able to meet these needs.

We have shown you how to determine the size of water heater you need in your home. If you have any doubts about choosing a water heater then a plumbing professional should be able to help.

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