February 2, 2026

How to Pick the Right Water Heater Size

February 2, 2026

Choosing a water heater size can be overwhelming. Not only does this appliance need to meet your needs, but it also has to fit in the available space you have in your home. At Roberts Plumbing Hydro Jet & Rooter, we’re here to help you make the right decision and ensure a worry-free water heater installation. We share helpful tips on sizing your water heater.

CONSIDER YOUR HOUSEHOLD SIZE

The number of people in your household plays a key role in determining the right size for your hot water heater replacement. Below are estimates of the capacity you need to look for if you are opting for a tank-type unit:


1 to 2 people: 23 to 36 gallons

2 to 3 people: 36 to 46 gallons

3 to 4 people: 46 to 56 gallons

5 or more people: Over 56 gallons

WHAT HAPPENS IF I CHOOSE THE WRONG WATER HEATER SIZE?

When your water heater is too small or too large for your needs, you are likely to run into costly issues in the long run. Undersized water heaters prematurely wear down as they need to exert more effort to keep up with your hot water demands. On the other hand, oversized units waste significant amounts of energy because it heats more water than necessary. They are also more expensive upfront and use more energy than appropriately sized heaters. When you turn to us for water heater services, rest assured that we’ll help you make the right choice.


Whether you need a traditional or tankless water heater, Roberts Plumbing Hydro Jet & Rooter can help you find the best one for your needs and budget. Get in touch with our team today to schedule an appointment.

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