55000 BTUs 3.9 GPM Propane Tankless Water Heater Review: Heats Water to 124F in 25 Seconds

Propane Tankless Water Heater Overview

55000 BTUs 3.9 GPM Propane Tankless Water Heater heats water for rv tankless water heater users who need a flow rate of 3.9 GPM for a family of four.

A 3.9 GPM flow rate allows for a steady shower for a family of four, providing enough hot water for a van life shower or a truck camper. This volume of water delivered per minute ensures that the flow remains consistent during a quick shower.

The 55000 BTUs 3.9 GPM Propane Tankless Water Heater delivers this output and reaches 124F in 25 seconds. It features a 15 x 15 inch door and includes a shower head kit with an external outlet.

We evaluated 38 rv tankless water heater (recreational vehicle tankless water heater) options and selected 15 for full review based on buyer ratings and screening criteria. This model was chosen because it has 124 buyer ratings, the 10th most of the 38 screened.

The Short Answer on the Propane Tankless Water Heater

Best for: you need a high-flow heater for a van or truck camper where you require more than 2.5 GPM for a multi-person shower.

The Propane Tankless Water Heater is a practical choice at the $279.99 price point.

• Pro: The 3.9 GPM flow rate provides sufficient volume for a family of four.
• Pro: A smart remote control with a 6.6 feet range allows for convenient operation.
• Pro: The 15 x 15 inch door provides a standard mounting footprint for most RV installations.
• Con: The 55,000 BTUs of thermal power is insufficient for maintaining consistent flow at high altitudes.
• Con: The 13 x 13 inch opening requires specific clearance that may not fit all cabinetry.

Don’t buy this if: you plan to use the unit at altitudes above 5,000 feet where the 55,000 BTU output falls below the 60,000 BTU requirement for consistent flow.

Price assessment: The $279.99 price is fair for a unit that includes an external shower outlet and a smart remote.

If your setup requires a specific fit, see the best rv tankless water heater with 15×15 door options.

Specifications in Full

The Flow Rate of 3.9 GPM measures the volume of water delivered per minute.

Before You Buy: Rv Tankless Water Heater Checklist

The first thing to check is the installation space, as the 13 x 13 inch opening requirement is a hard constraint for fitting the unit.

• ☐ Measure your mounting area—the 13 x 13 inch opening requirement means a smaller space will prevent the unit from being installed.
• ☐ Confirm your plumbing compatibility—the unit is compatible with other brands of water heaters so you can avoid buying extra adapters.
• ☐ Verify your BTU needs—the 55,000 BTUs of thermal power provide enough heat for a 10-minute shower, but will result in a flow rate drop or cold water if your shower head pressure exceeds the heater’s capacity.
• ☐ Check your altitude—the 9,800 feet altitude rating means the unit will not maintain hot water at 10,000 feet elevation.
• ☐ Plan your drainage—ensure you have a path for condensate drainage to prevent internal moisture buildup and premature electronics failure.

You should not buy this product if you plan to use it at elevations above 9,800 feet or require a heating capacity above 55,000 BTUs.

If a tankless system isn’t right for you, view other ways to get hot water for your RV.

What These Specifications Let You Do

How this Rv Tankless Water Heater heats water in 25 seconds

You can have hot water ready in 25 seconds, which is the time it takes for the Propane Tankless Water Heater to reach 124F. This rapid heating eliminates the need to wait for a large tank to cycle through its heating elements, providing immediate results for quick tasks or long showers.

The 55,000 BTUs of thermal power provide enough energy to run a shower for 10 minutes without a flame out. While this is sufficient for standard use, it is worth noting that 55,000 BTUs is below the 60,000 BTU reference figure required to maintain consistent flow rates at high altitudes or in extreme cold.

Dual Outlet Versatility

The Propane Tankless Water Heater provides a steady shower for a family of four because it supports a 3.9 GPM hot water flow rate. This volume of water is more than enough to provide hot water for a van life shower or a truck camper, where requirements typically fall between 1.5 and 2.5 GPM.

This unit features two water outlets, including an external outlet that connects to a shower head. Having a dedicated external port allows you to plumb a separate shower station without rerouting internal plumbing, similar to how a multi-tap faucet allows different zones to run simultaneously.

Operating this Rv Tankless Water Heater with a 6.6 foot remote

You can manage the unit from a distance using a smart remote control with a 6.6 feet range. This allows you to toggle the water heater from inside a cabin or a nearby standing area without needing to be physically adjacent to the mounting location.

The remote control functionality is listed as available on 34 of the 38 screened listings, making it a standard feature for modern systems. Because the remote range is specific to 6.6 feet, you should ensure your mounting location and primary usage area fall within this distance to maintain convenient access.

The Propane Tankless Water Heater Job by Job: What Its Figures Cover

The Propane Tankless Water Heater against the jobs buyers ask about, worked out from its listed BTU output and flow rate and a typical need for each job.

The Propane Tankless Water Heater Against Similar Rv Tankless Water Heaters

• The RVPart Pro RVGBD-1518 42,000 BTU Tankless Water Heater is $10 cheaper than this model.
• The Somokg RV Tankless Water Heater matches this unit’s 3.9 GPM flow rate.
• The MYACUC RV Tankless Water Heater costs $10 more than this unit.
• The Kohree KR5511 60,000 BTU RV Water Heater offers a higher 60,000 BTU output.
• The RV Tankless Water Heater Propane is $17.50 cheaper than this model.
• This model ranks 5th highest-rated among the six options compared.

Buyers requiring the highest possible output for extreme cold should choose the Kohree KR5511 60,000 BTU RV Water Heater instead.

You can find our full APUS 68,000 BTU review to see how this higher-capacity model performs.

Setting Up This Rv Tankless Water Heater, and What Support Covers

Preparing the propane source and mounting surface for installation

You must have a propane fuel source connected to the unit before the Propane Tankless Water Heater can provide hot water.

1. Mount the unit to a surface with a 13 x 13 inch opening for the internal outlet.
2. Connect the 15 x 15 inch door to the access panel to ensure a secure seal.
3. Attach a pressure regulator to the gas line to maintain consistent gas flow to prevent flame outs.
4. Install a condensate drain hose to prevent moisture buildup and internal corrosion.
5. Pair the smart remote controller to set your desired temperature from a range of 6.6 feet.

Choosing a unit with insufficient BTU output for your specific environment can result in a flame out during use, requiring a full system restart.

Verifying warranty terms and regional CSA safety certifications

Warranty terms and support availability vary by seller and country.

• Confirm the specific CSA Certification for your region to ensure the unit meets local gas pressure safety standards.
• Verify the remote controller pairing instructions to ensure you can adjust the temperature from your desired location.
• Check that the propane connection matches the required fittings to prevent gas leaks.

Perform a full cycle test of the water flow and remote functionality the day the unit arrives while your return window remains open.

Propane Tankless Water Heater Buying Questions Answered

Will the 55000 BTUs 3.9 GPM Propane Tankless Water Heater provide enough hot water for a family of four?

Yes, the 55000 BTUs 3.9 GPM Propane Tankless Water Heater provides a 3.9 GPM hot water flow rate, which exceeds the 2.5 GPM needed for a family of four. This flow rate ensures that multiple people can access hot water simultaneously without a significant drop in temperature.

Can the 55000 BTUs 3.9 GPM Propane Tankless Water Heater handle high-altitude use?

The 55000 BTUs 3.9 GPM Propane Tankless Water Heater is rated for an altitude of 9,800 feet. However, because it falls below the 60,000 BTU reference figure required for consistent flow at extreme heights, you should verify your specific elevation requirements before ordering.

Does the 55000 BTUs 3.9 GPM Propane Tankless Water Heater include a remote?

Yes, the 55000 BTUs 3.9 GPM Propane Tankless Water Heater includes a smart remote control with a 6.6 feet range. This allows you to operate the unit from a distance, which is useful for managing temperatures from inside the camper.

What is the door size for the 55000 BTUs 3.9 GPM Propane Tankless Water Heater?

The 55000 BTUs 3.9 GPM Propane Tankless Water Heater features a 15 x 15 inch door for access. You should measure your mounting area to ensure this footprint clears your existing cabinetry or wall space.

New owners should start by viewing how an rv tankless water heater works to understand the technology.

Is the Propane Tankless Water Heater Right for You?

Who the Propane Tankless Water Heater suits and the jobs it is the wrong choice for, listed below with the reason for each.

Where to Buy This Rv Tankless Water Heater

The Propane Tankless Water Heater sat at $279.99 in the listing data from November 2026; the price you see at checkout can differ.

Rv tankless water heaters are sold by the retailers below – we do not track which of them has the Propane Tankless Water Heater in stock, so check availability and the current price with the retailer before making a trip.

• eBay (online only) — open-box and refurbished stock
• Amazon (online only) — wide selection of brands and consumer reviews
• Camping World (online and physical stores) — large physical footprint and specialist staff
• REI (online and physical stores) — outdoor gear expertise and in-store returns
• RVStore (online only) — specialist retailer for RV components and accessories
• Walmart (online and physical stores) — accessible pricing and physical store availability

Explore top rated rv tankless water heater with 18×18 door models for larger mounting spaces.

Final Verdict on the Propane Tankless Water Heater

If you need a heater that provides enough hot water for a family of four or a steady shower in a truck camper, the Propane Tankless Water Heater provides a 3.9 GPM flow rate. This volume of water is sufficient for most mobile shower needs, as it exceeds the 2.5 GPM requirement for a steady flow in a van or truck camper.

You should check your specific shower head’s flow requirements and compare them against the 3.9 GPM output before ordering. If your shower head requires more than 3.9 GPM, the heater may struggle to maintain temperature, whereas a lower flow requirement will result in a consistent stream.

You should choose the Propane Tankless Water Heater if you need a compact unit for a camper or RV that provides a dual-outlet system for both internal and external use. This model costs around $280.00 and features a 55,000 BTU heating capacity.

The 55,000 BTU rating allows this unit to run a 10-minute shower at the lower end of the required power range, though it does not provide the 60,000 BTU output required to maintain consistent flow at high altitudes or in extreme cold. The 3.7 rating from 124 buyers serves as a baseline for the user experience of this specific model.

Skip it if: You plan to use the heater at elevations above 9,800 feet or in extreme cold where a 60,000 BTU output is required to prevent the unit from shutting off.