RV Water Heater Buyers Guide
Water Heaters
When choosing an RV water heater, consider what size or capacity you need. RV water heaters are rated in gallons, indicating how much water the heater can store and heat. It is also important to check the water heater's recovery time (how quickly it can heat a new tank full of water).
After selecting the right size for your space, choose the power options for your heater. You can opt for electric, gas, or a combination of both. An electric water heater runs off your 110V power supply, while a gas water heater draws power from your LP system. A combination heater allows you to switch between electric and gas power.
If you are using a gas water heater, you'll need to select the ignition type. Traditional pilot water heaters are no longer available, so upgrading to a Direct Spark or Electric Ignition is necessary.
Direct Spark or Electric Ignition is an electronic ignition that lights the gas directly at the burner with a spark. It can be operated with the push of a button. Many models let you install the ignition switch inside your RV, making it convenient and keeping you out of bad weather.
There are two major manufacturers of RV water heaters: Suburban and Dometic. Both brands have unique ways to extend product life and reduce the need for repairs.
Dometic (formerly Atwood) tanks feature a high-strength aluminum core with corrosion-resistant cladding, eliminating the need for an anode rod. Suburban tanks are porcelain-lined steel with an anode rod to protect against corrosion, similar to home water heaters. With proper maintenance, Suburban tanks can last beyond their three-year warranty.
Some water heaters also offer a motor aid or heat exchange option, using engine heat to preheat water while you drive, providing hot water upon arrival.