Skip to main content

Same-day appointments when crews are available

Call 240-540-5012

What size water heater does your home need?

Sizing isn't about square footage — it's about your busiest hour. Tell us how your household actually uses hot water and we'll show both a tank capacity and the tankless flow rate that would keep up.

Current fuel type
Estimated peak hour: ~46 gallons
If you stay with a tank
50 gallon
If you go tankless
2.5+ GPM at a DMV winter inlet temperature
  • We can confirm your fuel type and venting in about a minute on the phone.

Planning guidance only. Final sizing depends on fuel, venting, incoming water temperature, clearances and how your household actually uses hot water — we confirm it on site.

Send three photos. Get a fast water-heater quote.

Show us the full heater, the model label and the vent or connections. Our team reviews the job and follows up with clear options.

Equipment experience

A. O. Smith is the line we stock and install most. We also work on the leading tank, tankless and hybrid systems already found in DMV homes.

Compare brands
  • Hot Water ExpressTHE HOT WATER EXPRESS
  • A. O. Smith
  • Bradford White
  • Rheem
  • State Water Heaters
  • Navien
  • Rinnai

Manufacturer names identify equipment we install or service. Hot Water Express is an independent local company; manufacturer authorization or endorsement is not implied.