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May 22, 2026

Factors That Can Affect the Size of Water Heater You Get

Thinking about a new water heater? Sizing matters. A unit too small means cold showers; one too large means wasted energy every month. Here's what affects sizing.

Our licensed master plumbers have written this guide based on decades of work in homes across Maryland & Washington DC. If you have a question after reading, you can always call our dispatch line — a real person picks up, 24/7.

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Quick tip

When in doubt, shut off the main water valve and call a licensed plumber. A small leak today is a major repair next month — we'd rather hear from you early.

Have a question about your home?

Call us — our licensed master plumbers are happy to talk it through, no obligation.

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