Heating

Stay Warm on the Water and on the Road

Whether you're anchored in a cold harbor, dry-docked for winter, or parked at a remote campsite in sub-freezing temperatures, reliable heating is one of the most critical systems on any RV or boat. The right heating solution doesn't just keep you comfortable — it protects your engine, water lines, batteries, and plumbing from freeze damage that can lead to costly repairs.

What RV & Marine Heating Systems Do

Heating products in this category cover a wide range of applications. Furnaces and forced-air heaters provide primary cabin warmth in motorhomes, travel trailers, and campers, typically drawing on LP gas for efficient BTU output. Bilge and compartment heaters are essential for boats, targeting engine spaces and wet bays to prevent freeze damage to blocks, hoses, and raw-water cooling systems. There are also dedicated underbelly and water-bay heaters designed to protect RV freshwater tanks and plumbing runs when temperatures plunge overnight.

Key Considerations When Shopping Heating Products

• Heat output (BTUs or watts): Match output to the volume of your cabin or compartment. An undersized unit will run continuously without reaching target temperatures.
• Fuel or power source: LP gas furnaces are ideal for RV cabins where propane is already on board. Electric resistance heaters are the go-to for marine bilge and engine compartments where shore power or battery hookups are available.
• Ignition and safety certifications: Look for units tested to USCG, ABYC, and SAE standards, especially in marine environments where ignition protection is mandatory.
• Thermostat control: Automatic thermostats cycle the heater on and off to conserve energy and prevent overheating — a must-have for unattended winterization setups.
• Installation footprint: RV furnaces come in standardized cabinet sizes for drop-in replacement, while marine heaters should be compact and mountable in any orientation to fit tight bilge spaces.

Top Brands in RV & Marine Heating

Suburban Mfg is the benchmark name in RV heating. Suburban Manufacturing has been a leading supplier to the RV industry since the late 1960s, pioneering horizontally vented gas heating systems, efficient DC furnace motors, and solid-state spark ignition — innovations that became industry standards. Today, their NT and SF series furnaces are found in a vast number of factory-built motorhomes and travel trailers, and their replacement parts are some of the most widely stocked in the industry.

Xtreme Heaters has carved out a well-earned reputation in the marine and RV electric heater space. Specializing in forced-air bilge heaters, cabin heaters, and RV compartment heaters, Xtreme Heaters products are tested to U.S. Coast Guard standards and rated IP68 for moisture and dust resistance — critical credentials for engine compartments and wet bays. Their thermostat-controlled units cycle automatically to protect against freeze damage while keeping energy use in check.

Choosing the Right Heater for Your Setup

For an RV that serves as a primary or seasonal residence in cold climates, a ducted LP gas furnace from a brand like Suburban provides the capacity and familiarity of a home heating system in a compact, proven package. For boaters who leave their vessel in the water through winter or want to extend the shoulder season, a thermostatically controlled electric bilge heater is a set-it-and-forget-it solution that guards the engine and keeps mold-causing moisture at bay. In either case, matching the heater to your specific space — by volume, power source, and climate — is the most important decision you can make.