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Continuous hot showers on the road and off the grid. Compare RV tankless water heaters that replace a 6- or 10-gallon tank, and portable units for camping and outdoor use.
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An RV tankless water heater gives you endless hot water instead of a 6- or 10-gallon tank that runs out after a short shower. Most heat with propane, fire on demand when you open a tap, and use 12V DC power for the igniter and controls. Brands such as Furrion, Girard, Truma and Suburban make units designed to drop into the standard RV water heater opening.
| Spec | Why it matters |
|---|---|
| Cutout size | Must match your existing 6- or 10-gallon opening, or you need an adapter frame |
| BTU and GPM | 40,000–60,000 BTU typically gives 1.5–2.5 GPM, enough for one shower |
| Minimum flow | Low-flow RV shower heads must still trigger the burner |
| Power | 12V DC draw for controls; some units also need 120V |
| Freeze protection | Important if you camp in cold weather |
| Door and finish | Flush-mount doors in white or black to match your rig |
Looking for a tankless water heater for RV use, a tankless water heater for camper trailers or a tankless rv water heater for a motorhome? Most are an rv tankless water heater propane design; a few are rv electric tankless water heater models for shore power. Popular brands include the Furrion tankless water heater, Girard tankless water heater and Truma tankless water heater (AquaGo).
A portable tankless water heater is a compact outdoor unit, usually propane-fired, for campsites, outdoor showers, cabins, barns, washing pets or cleaning gear. Many run on 2 D-cell batteries for ignition and a standard 20 lb propane cylinder, with flows around 1.5–3 GPM.
A tankless portable water heater such as a Camplux tankless water heater or Eccotemp unit is the simplest option for campsites.
If you stay mainly at campgrounds with shore power, a compact electric unit can work for a sink or a short shower. Electric tankless output is limited by the 30- or 50-amp RV service, so expect modest flow. See point-of-use water heaters.
Hard water at campgrounds causes scale. Descale your RV or portable unit regularly with a flush kit and follow our flushing guide. Installation, winterizing and troubleshooting are covered in the RV tankless water heater guide.
Yes. Many RV tankless units are built to fit the standard opening of a 6- or 10-gallon RV water heater, so they can replace it without cutting the sidewall. Check the cutout dimensions, door size, gas connection and 12V power requirements against your rig.
Most RV tankless units burn propane and use 12V DC for controls and ignition. A few are electric-only or hybrid. Electric units need shore power or a generator.
No. Portable propane water heaters are for outdoor use only because they vent combustion gases directly. Using one indoors, in a tent or in an enclosed space risks carbon monoxide poisoning.
Turn it off, drain it using the drain plugs or bypass valve, and blow out or add RV antifreeze as the manufacturer allows. See our RV tankless water heater guide for step-by-step instructions.
