Best RV Propane Heater for Tankless Hot Water

Tankless propane water heaters are a common upgrade for RV owners seeking instant hot water, reduced propane waste, and lighter equipment. The table below summarizes five highly relevant RV tankless propane heaters chosen for compatibility, BTU output, and user features.

Product	Brand	Output / Key Feature
Countrymod RV Tankless Water Heater	countrymod	65,000 BTU, Dual Water Outlet, 12V DC
KINGRVER 65,000 BTU Tankless Heater	KINGRVER	65,000 BTU, 0.5 GPM activation, High Altitude Compatible
OEVANT 55,000 BTU Tankless Heater	OEVANT	55,000 BTU, Remote Controller, Rapid Heat
FOGATTI InstaShower 7	FOGATTI	48,000 BTU, 2.5 GPM, Multiple Door Options
Xenjum 65,000 BTU Tankless Heater	Xenjum	65,000 BTU, 3.9 GPM, Dual Outlet & Shower Kit

Countrymod RV Tankless Water Heater

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The Countrymod unit is a 65,000 BTU tankless propane water heater designed for RV use with a 12V DC system. It highlights a double water outlet layout providing both internal and external connections for indoor showers and outdoor rinsing. The manufacturer emphasizes instant heating with continuous hot water whenever sufficient propane and water supply are present.

Safety and control features include a 40-minute timer protection to prevent extended continuous operation and staged combustion to reduce overheating risk during warm weather. The unit is presented as suitable for travel and extended off-grid use where electrical power is limited.

KINGRVER 65,000 BTU Tankless Water Heater

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KINGRVER’s model provides 65,000 BTU heating capacity and an industry-leading low-pressure activation at 0.5 GPM, allowing operation with minimal inlet pressure. The product is listed with multiple door size options to match RV cutouts, making it a candidate for retrofits.

The unit is engineered for high-altitude operation and includes automatic freeze protection below 42.8°F. Features aimed at cold-climate and mountain use make it useful for RVers traveling in variable elevations.

OEVANT 55,000 BTU RV Tankless Water Heater

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OEVANT offers a 55,000 BTU propane tankless heater with a built-in remote controller and an integrated microcomputer control panel. The unit reportedly reaches high outlet temperatures quickly and maintains stability using staged combustion technology to minimize temperature swings.

User-friendly controls allow temperature adjustment between the listed Fahrenheit ranges and provide error codes to assist in troubleshooting. The 12V DC power input supports typical RV electrical systems for ignition and control functions.

FOGATTI InstaShower 7 Tankless Heater

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FOGATTI’s InstaShower 7 is positioned as a family-oriented RV tankless heater with 48,000 BTU output and rated at 2.5 GPM. The model supports multiple door sizes and two color options for aesthetic matching during retrofits.

Highlighted attributes include staged combustion for consistent temperatures, an altitude mode enabling operation up to 9,800 feet, and anti-scald protection. The manufacturer markets it as a direct replacement for many RV electric and tank heaters.

Xenjum 65,000 BTU Tankless Water Heater

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Xenjum’s model delivers a 65,000 BTU output and claims up to 3.9 GPM flow, supporting continuous hot water for multiple simultaneous uses. The heater includes front and rear water outlets and ships with a shower kit for immediate outdoor or indoor connection.

Temperature is controlled via a microcomputer system that allows a specific Fahrenheit target and thermostatic control to maintain setpoints. Built-in features aim to keep water output steady across variable flow conditions.

Buying Guide: How To Choose The Right RV Propane Tankless Heater

Selecting the right RV propane tankless heater requires weighing several technical and practical factors. Below are key considerations to compare models objectively.

Heating Capacity (BTU) And Flow Rate (GPM)

BTU rating indicates maximum heat output. Higher BTU typically supports higher GPM (gallons per minute). For single-shower use, units 40,000–55,000 BTU may suffice. For multiple simultaneous draws, consider 60,000+ BTU models that advertise flows above 3 GPM.

Activation Flow And Low-Pressure Start

Low activation flow (measured in GPM) determines whether the heater will fire at low faucet pressure. Units claiming 0.5 GPM activation or similar are better for low-pressure systems or distant inlet situations.

Power Requirements And Ignition

Most RV tankless propane heaters require 12V DC for ignition and control electronics. Confirm your RV’s battery and charging capacity can support the ignition sequence and any continuous electronics like remote displays.

Altitude And Climate Compatibility

Operating at high elevations reduces combustion efficiency. Models with an altitude mode or high-altitude certification (e.g., up to ~9,800 ft) include adjustments to air/gas ratios and maintain reliable performance in mountains. For cold climates seek freeze/antifreeze protection and low-temperature safeguards.

Safety Features And Controls

Look for staged combustion, overheat protection, automatic shutoff timers, and thermostatic/anti-scald controls. Remote controllers and digital displays add monitoring capability—useful for viewing error codes, gas usage, and set temperatures.

Installation Fit And Door Size

Confirm the heater’s cutout dimensions and available door kits match your RV’s opening. Many units offer multiple door sizes for retrofit. Check whether a replacement door is included or sold separately, and ensure clearance in your compartment for venting and service access.

Plumbing Options: Dual Outlets And Outdoor Access

Units with dual water outlets (front and rear) support both internal showers and external rinse points. If you often use outdoor showers or need a washdown hookup, prioritize models with a dedicated external outlet or included shower kit.

Energy Efficiency And Propane Consumption

Efficiency ratings are not always standardized across listings. Staged combustion, precise flame control, and high heat-exchange designs reduce propane usage. Look for manufacturer statements on efficiency or thermal transfer and compare reported operating behaviors.

Certifications And Warranty

CSA certification and manufacturer warranties indicate compliance and post-purchase support. Check warranty length, coverage of parts and labor, and availability of replacement parts and service for your RV region.

Maintenance And Troubleshooting

Consider access to error codes, remote diagnostics, and replaceable components such as igniters or sensors. Tankless heaters may require descaling in hard water areas—verify recommended maintenance intervals and procedures.

Comparison Perspectives

• Single Camper/Light Use: A mid-range BTU unit (40k–55k) with reliable ignition and anti-scald control may be adequate and more fuel-efficient.
• Family Or Multiple Simultaneous Uses: Prefer higher BTU (60k+) and higher GPM ratings to avoid temperature dips during concurrent showers and dishwashing.
• High-Altitude Travelers: Choose units with specific altitude mode or tested operation above 8,000–9,800 feet to ensure consistent combustion.
• Cold-Weather Use: Units with explicit freeze protection and antifreeze modes help prevent damage in sub-freezing conditions.
• Retrofit Projects: Confirm door size options and physical dimensions before purchase to match existing RV openings and venting arrangements.