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Sturgis:(269)651-4499 | Bronson:(517)369-8102 | Coldwater:(517)279-1221
Sturgis:(269)651-4499 | Bronson:(517)369-8102 | Coldwater:(517)279-1221
Copyright Shamrock Heating & Cooling - 2013
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Once you have determined that replacing your water heater is inevitable, selecting the perfect unit for your needs may seem confusing because there are so many types and sizes. For example - how many gallons do you need? Do you want a tankless water heater or conventional? Gas or electric? What about solar?

Sometimes the more research you do the worse it gets! First things first, how much hot water do you need? To effectively figure what size you need you have to figure what is called your family's peak usage. This means that you have to figure how much hot water your household will use at the most in any particular hour. This is accomplished by answering the following questions. (The number following the activities refer to the gallons used for each activity.):

How many times in the peak hour of your family's day do you?

*Showering - 20

*Bathing - 20

*Shaving - 2

*Washing hands and face - 2 Hand dishwashing - 4

*Automatic dishwashing - 10

*Preparing food - 5

*Automatic clothes washing - 32

So if you use the most water at 6 p.m. when the dishwasher is running, there is a load of clothes in the wash, and two people will take showers then your peak water use is 82 gallons per hour. You need a tank with at least 82 gallon FHR, or first hour rating. This number does not account for low flow shower heads and faucet aerators. Many 40-50 gallon water heaters come close to this but you may need something a little bigger.