Calentadores de agua sin tanque para vehículos recreativos

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A tankless RV water heater heats water on demand rather than storing it in a tank, which means you are not limited to the 6 or 10 gallons a traditional unit holds. This makes them a popular upgrade for full-timers and anyone who wants more flexibility for showers and dishwashing without waiting for a tank to reheat.

Our tankless water heater selection includes units from Furrion, Fogatti, Suburban, and Girard. Most are designed to fit into the same exterior opening as a standard tank water heater, making them a practical replacement option. Door kits are typically sold separately, so confirm the cutout dimensions of your existing unit and check door compatibility before ordering.

How does a tankless RV water heater work?

A tankless RV water heater heats water on demand as it flows through the unit, using an LP gas burner triggered by water flow rather than storing pre-heated water in a 6 or 10 gallon tank. That means continuous hot water for back-to-back showers and dish washing, plus less weight and freed-up bay space compared to a traditional tank model. If you prefer a conventional setup, see our 10 gallon RV water heater collection.

Will a tankless water heater fit my existing RV opening?

Most tankless RV water heaters in this collection are built to fit the standard 12 inch x 12 inch or 16 inch x 16 inch wall cutouts left behind by a Suburban or Atwood 6 gallon tank model, but flange dimensions, plumbing connections, and 12V wiring locations vary by brand. Measure your current opening height, width, and depth, then confirm the cutout spec on the product page before ordering. Text or call 817-984-1852 if you need help matching a replacement.

What should I do to winterize a tankless RV water heater?

Tankless units still hold water in the heat exchanger and lines, so they need to be drained and bypassed before freezing temperatures, the same as a tank model. Open the drain valve, blow out the lines with low-pressure air, and run RV antifreeze through the system using a bypass kit. Our RV winterizing kits collection has the bypass valves, blowout plugs, and antifreeze fittings you need for the job.

Do tankless RV water heaters need 12V power, LP gas, or both?

Both. The burner runs on LP gas for heat output, and the ignition board, flow sensor, and control panel run on 12V DC from your house battery. Expect roughly 2 to 3 amps of draw while the unit is firing. If your 12V system needs attention before the upgrade, browse our RV electronics collection for converters, fuses, and wiring components.

Does United RV Parts offer free shipping on tankless water heaters?

Yes. Orders over $100 ship free within the contiguous US, which covers every tankless water heater in this collection. Larger units may ship via standard ground freight depending on weight and destination, and the shipping method is noted on each product page.