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What Size Tankless Water Heater Will Work Best For You

Swan Electric, Plumbing, Heating & Air

If you’re looking for a new water heater for your home, you may be considering a tankless model. Tankless water heaters are energy efficient and compact, but it can be difficult to know what size tankless water heater is best for you. In this blog, we will discuss what size tankless water heater is best for your needs and how to determine the suitable size for your home.

Determining How Much Hot Water You Need

If you’re considering installing a tankless water heater in your home, one of the first steps is determining how much hot water you need per day. This will help you choose the perfect size tankless water heater to meet your hot water needs.

To get an accurate estimation of your hot water needs, you’ll need to calculate your daily gallons-per-minute (GPM). This is the measure of the amount of water that passes through the heater in a minute. It’s important to take into account all of the appliances and fixtures in your home that require hot water, such as showers, dishwashers, washing machines, etc. 

Tankless Water Heater Size Calculator

To calculate your GPM, add up the total flow rate of all of the appliances and fixtures that require hot water in your home. If you’re unsure of their flow rates, you can refer to the manufacturer’s website for specific product information.

For example, a standard shower head can have a flow rate of 2.5 GPM, and a washing machine can have a flow rate of 1.5 GPM. Adding up all of the flow rates from each appliance and fixture in your home can give you an estimate of your total daily GPM.

Once you have this number, you can use it to determine what size tankless water heater will be suitable for your home. Generally, a tankless water heater can provide up to 5 GPM, so if your estimated usage is more than 5 GPM, you’ll need a larger tankless water heater. 

Rooms and Appliances Influences Tankless Water Heater Size

When selecting a tankless water heater, it is important to take into account the number of rooms and appliances that require hot water in order to determine the best size. Tankless-water-heaters are typically measured in gallons per minute (GPM), and this measurement is an important factor when considering which size tankless-water-heater is suitable for your needs.

Tankless Water Heater Gallons Per Minute (GPM)

For comparison, a standard 50-gallon tank water heater generally delivers around 5 GPM. Therefore, if you require a similar amount of hot water as what is delivered by a 50-gallon tank, you should look for a tankless water heater that provides at least 5 GPM.

In general, the more GPM your tankless water heater can provide, the more rooms or appliances it can supply hot water to simultaneously. Therefore, if you have multiple rooms or appliances that need hot water, you may want to consider a higher GPM model to ensure all rooms and appliances get the hot water they need.

As you are searching for a suitable size tankless-water-heater for your home, it’s important to take into account the amount of hot water you need on a daily basis. By doing so, you can accurately estimate the GPM requirements for your home and select the best-size tankless water heater accordingly.

Number of Household Members Influences Tankless Water Heater Size

When it comes to choosing the perfect tankless water heater for your home, the size of your family plays a crucial role. A larger family will require more hot water than a smaller one, so you need to make sure that your tankless water heater can meet those needs. As a general rule of thumb, a tankless water heater should provide about 40 gallons per day for each person in the household. If you have more than three people in your family, you may want to consider upgrading to a larger model.

When sizing the best tankless water heater for your family, you also need to consider your peak hot water usage times. For example, if your family typically takes showers or baths in a similar time frame, then you may want to choose a larger tankless water heater that can handle both peak usage times. 

Tankless Water Heater Size for a Family of 4

For families of four, it is recommended to install a tankless water heater with a minimum capacity of 2.5 gallons per minute (GPM). This will provide enough hot water for multiple users to run simultaneous showers or do laundry and dishes at the same time. Additionally, larger homes with multiple bathrooms should consider installing a tankless water heater with a capacity of 3 GPM or higher for maximum efficiency and convenience.

Let Swan Help You Choose the Best Size Tankless Water Heater for You

Choosing the perfect size tankless water heater for your home can be a challenge, but it doesn’t have to be. Knowing your hot water usage and the number of rooms and appliances that need hot water in your home can help you determine the suitable size tankless water heater for you. Additionally, your family size should be taken into account when choosing the suitable size tankless-water-heater. Taking these factors into consideration, you can easily get to know what size tankless water heater would be best for you. Call Swan today to schedule your tankless water heater upgrade, and don’t forget to check out our Google reviews !

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