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Manufactured and mobile homes have their own water heater rules. Here’s how to choose a compliant replacement, tank or tankless.
Manufactured homes built since 1976 follow the federal HUD code. Water heaters installed in them must be listed for manufactured or mobile home use. Typical differences:
When choosing a water heater for mobile home use, whether a mobile home hot water heater tank or a tankless water heater for mobile home installation, start with the listing.
| Gas (natural gas or propane) | Electric | |
|---|---|---|
| Recovery speed | Faster | Slower |
| Venting | Sealed combustion vent | None |
| Running cost | Usually lower with natural gas | Usually higher |
| Installation | Gas line and venting | 240V circuit |
Mobile home water heaters electric models are simpler to install, while a mobile home gas water heater recovers faster.
A tankless water heater can save space and provide endless hot water, but check:
For a single bathroom or kitchen, a point-of-use heater may be the easiest upgrade.
Several major brands, including Rheem and A.O. Smith, sell tank models specifically for manufactured homes. For tankless, confirm the manufactured-home listing on each product page or ask us before ordering.
Check each listing for manufactured-home approval before you buy.
Generally no. Manufactured homes built to the HUD code require water heaters approved for manufactured home use. Gas models typically need sealed combustion, and installation details differ from site-built homes. Check local rules and the product listing.
Yes, if the specific model is listed or approved for manufactured home installation and installed per its manual and local code. Many electric tankless units are easier to fit, but electrical capacity is often limited in mobile homes.
Many mobile homes use 20–40 gallon tanks, with 30 gallons common for two to three people. For tankless, size by flow; see our sizing calculator.
This guide is general information for U.S. homeowners, not professional advice. Gas, electrical and venting work must follow the manufacturer’s instructions and local codes, and in most areas requires a licensed plumber, electrician or gas fitter and a permit. Specifications and prices change; always confirm details on the product page and in the installation manual.
