5 Best Budget RV Water Heaters for a Camper Van in 2026: A Practical RV Guide

The Suburban SAW6DEL is a six gallon direct fit replacement for competing aluminum tank heaters, built to drop into the same opening without cutout changes, cabinet depth changes or plumbing rework. Its porcelain-lined steel tank mimics the longevity of a residential heater, and the replaceable anode rod doubles as the drain plug. Input is 10,000 BTU on propane.

The Suburban SW6D below it targets a new framed opening, while this model is designed around swapping into an existing aluminum-tank opening, and it offers an optional electric element for campsite or generator power. The listing states a recovery rate of 14.14 gallons per hour on LP gas and 6.10 gallons per hour with the electric element. Direct spark ignition removes the pilot light.

This sits at the top of this shortlist on price, and the step up buys a proven six gallon reserve and dual-fuel flexibility. Owners who want a conventional heater in a larger conversion will find it a straightforward project.

The Suburban SW6D is a six gallon, direct spark ignition tank heater with a porcelain-lined steel tank and a replaceable anode rod that doubles as a drain. It is rated at 12,000 BTU per hour on propane, and the optional electric element is 1,440 watts. Its exclusive flue tube design slows combustion to transfer heat into the water efficiently.

Set against the SAW6DEL, the SW6D carries a higher BTU rating and states exact dimensions: a 12.69 by 12.69 by 19.19 inch body for a 12.75 by 12.75 by 19.19 inch cutout. Those figures make planning precise. The listing also states a recovery rate for the electric element, supporting a dual-fuel setup on shore power.

The porcelain-lined steel construction is a residential-style design aimed at long life. It suits a builder who treats the heater as a permanent fixture and has already framed the opening, since the exact dimensions make cabinetry around it easy to plan.

The Orbek Altitude replaces the tank with a 60,000 BTU propane tankless burner that the listing rates at 3.5 to 3.9 GPM. Oxygen-free copper heat exchangers and brushless DC fans handle the heat transfer, and a high-altitude operating mode keeps it firing in thin mountain air. It runs from a 12 volt DC supply and includes a built-in 150 PSI pressure-reducing valve.

Against the Suburban tank heaters, the Orbek removes the stored volume and the weight that comes with filled steel. Without a tank, a van never runs out of hot water mid-shower, and no yearly tank maintenance is needed. The listing mentions three door sizes in black or white for 15 by 15, 15 by 18 and 18 by 18 inch openings, and it states CSA certification.

High-altitude tuning suits a mountain traveler, and a 12 volt supply matches what a van already has. Of the five, it is the strongest pick for a rig that mostly boondocks on propane with a healthy battery bank, where a tank-free design leaves room for bedding, storage and a proper shower corner.

The ERFEI Mini is a 2.5 gallon electric mini tank that plugs into a standard 110 volt NEMA 5-15 outlet and draws 1500 watts. Its thickened stainless steel inner tank resists corrosion, a pressure relief valve is included, and an LED digital display shows real-time water temperature with a knob to set it. The listing names RV, camper van, garage and food truck as uses.

In contrast to the propane picks, the ERFEI needs no venting, no exterior opening and no gas line, so it tucks under a sink or inside a cabinet. Setup is described as simple do-it-yourself work with standard water connections and no wiring changes. That shrinks the install to an outlet and two hoses, which makes it the quickest project of the five.

The 2.5 gallon reserve covers dishes and washing up. Builders who never want propane inside a small cabin will find it the realistic compact choice, and the digital display helps keep each setting efficient.

This kit adds a 120 volt electric heating element to an existing six gallon Suburban or Atwood style tank. It is built around 304 stainless steel, brass bushings for the tank connection, a nylon corrugated sleeve, an adjustable thermostat and an independent power switch. Overload protection trips when the current exceeds 5 amps, which protects both the element and the circuit feeding it.

Compared with buying a new dual-fuel heater, this kit upgrades what a van already carries, so the installed gas heater gains a second heat source for the cost of a small kit, with no new wall cutout and no new plumbing runs. The current limit keeps the load modest on a small shore power connection or generator. It is the lowest-cost route to electric heat on this list.

The independent switch lets the owner choose the source. It pairs naturally with a tank heater already in the wall and stretches each propane refill, which matters when a small bottle is the main fuel supply aboard. The adjustable thermostat also lets the owner fine tune the water temperature for dishes and showers.