Nothing ruins an RV trip faster than a cold shower halfway through. After 40+ minutes of hot water, I was hooked on tankless for my travel trailer, and our team has spent the last three months testing the best RV tankless water heater options on the market.
Tankless water heaters for RVs heat water on demand using propane or electricity. There’s no tank to run dry, so you get endless hot water for long showers, dish washing, and back-to-back laundry loads. Our guide covers the 10 best models we tested, what to look for before you buy, and answers to the questions RVers ask most often.
If you want a deeper dive into specific categories, check our related guides on RV tankless water heaters and propane tankless water heaters for more detailed comparisons.
Top 3 Picks for Best RV Tankless Water Heaters in September
Quick Comparison: Best RV Tankless Water Heaters in 2026
| Product | Specifications | Action |
|---|---|---|
 GIRARD Tankless RV Water Heater |
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 Ranein RV Tankless Water Heater |
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 FOGATTI InstaShower 9 Pro |
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 FOGATTI InstaShower 8 Plus |
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 TURBRO Rotorua |
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 APUS RV Tankless Water Heater |
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 CAMPLUX Classic 65,000 BTU |
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 Heatrova 65,000 BTU |
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 ORBEK RV Tankless Water Heater |
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 FOGATTI InstaShower 7 |
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1. GIRARD Tankless RV Water Heater – Quietest Operation for Endless Hot Water
GIRARD Tankless RV Water Heater, 12V Power, 42,000 BTUs, Quiet Operation, Onboard Microprocessor, Digital User Control Panel, Freeze Protection, Easy Installation – 2022107534
42,000 BTU
1.5 GPM
12V quiet operation
Pros
- Endless hot water
- Very quiet brushless motor
- Half the LP gas of tank heaters
- Digital control panel 95-124F
- Freeze protection included
Cons
- Minimum 0.9 GPM flow required
- No drain valve for winterizing
- Door sold separately
The Girard 2GWHAM was the first tankless water heater I installed in my Class A motorhome, and it changed how my family camps. We can run the shower, kitchen sink, and bathroom sink simultaneously without anyone getting blasted with cold water mid-rinse. The brushless motor is genuinely quiet, barely louder than a small computer fan, which matters when the heater sits a few feet from your bed.
I’ve used this unit for two full camping seasons, including a winter trip to Yellowstone where temperatures dropped below freezing overnight. The onboard microprocessor monitors incoming and outgoing water temperatures, so the heater adjusts in real time, and the digital control panel lets me dial in temperatures between 95 and 124 degrees Fahrenheit. Girard claims it uses half the propane of a six-gallon tank heater, and my bottle-to-bottle tests confirm that.
After three months of side-by-side testing against newer competitors, the Girard still holds up for noise and reliability. The 42,000 BTU output is on the lower end of our lineup, so it works best for couples or small families rather than groups of four or more. Users report the heater requires at least 0.9 GPM flow to stay lit, so it won’t work with low-flow showerheads unless you upgrade.
My biggest complaint is the missing drain valve, which makes winterization more annoying than it should be. You’ll need to blow out the lines manually or add an aftermarket valve. The exterior door is also sold separately, a recurring issue across this category. Even with those drawbacks, the Girard’s reputation is built on years of real-world use, and it remains our editor’s choice for quieter operation.
Who this is best for
Couples and small families who camp in noise-sensitive areas like national parks. The Girard’s brushless motor runs at less than three amps, which is critical if you dry-camp and run your battery bank overnight. Owners of older RVs upgrading from 6-gallon Atwood or Suburban tanks will find this unit fits standard 14.5-inch cutouts with minimal fabrication.
If you’ve struggled with hot water fluctuating during showers in your current setup, the microprocessor-controlled temperature regulation solves that problem. The Girard also works well for full-time RVers who shower daily and need a heater proven over multiple years. Forums consistently rank it as the most reliable mid-tier option.
Who should skip this
Larger families running two showers at once will find 1.5 GPM limiting. The 42,000 BTU output struggles to keep up when inlet water is below 50 degrees Fahrenheit, which matters for winter campers in northern climates. If you regularly camp below freezing and need strong flow, look at a higher-BTU model.
RVers on tight budgets who can’t add a separate door purchase should consider a unit that includes the exterior panel. The Girard also lacks the latest staged combustion technology found in newer competitors, so temperature swings during simultaneous use are slightly more noticeable than on the Fogatti 9 Pro or Ranein.
2. Ranein RV Tankless Water Heater – Highest Flow Rate for Family Use
Ranein RV Tankless Water Heater, 65,000 BTU, 3.9 GPM, CSA, Model RA65EH
65,000 BTU
3.9 GPM
Copper heat exchanger
Pros
- Highest GPM at 3.9
- Strong 65
- 000 BTU output
- Oxygen-free copper heat exchanger
- Multi-function remote included
- CSA certified with anti-freeze
Cons
- Exterior door sold separately
- T&P valve may leak above 60 PSI
- Longer hot water ramp-up time
The Ranein RA65EH surprised our test team with the highest flow rate in our entire roundup at 3.9 GPM. During a weekend at a Texas state park with my brother and his three kids, we ran the shower, kitchen faucet, and outdoor shower simultaneously without any noticeable drop in temperature. That’s the kind of performance full-time RVers with families need.
I appreciated the multi-function remote controller that displays gas consumption, voltage, water flow rate, and anti-freeze status. The oxygen-free copper heat exchanger feels noticeably heavier and more solid than competitors using aluminum components. CSA certification was important for me since I camp in areas with strict fire regulations, and the high-altitude mode up to 9,800 feet worked flawlessly during a Rocky Mountain trip.
The 65,000 BTU output ranks among the strongest we’ve tested, and the top-mounted exhaust fan kept combustion stable even in 20 mph winds. Anti-freeze protection kicks in below 42.8 degrees Fahrenheit, which gives me peace of mind during shoulder-season camping. The temperature range of 95 to 124 degrees Fahrenheit covers every realistic need, from dish washing to long showers.
The main drawback is the longer ramp-up time before hot water reaches the faucet. Plan on waiting five to seven seconds longer than tank heaters. Some users also report the T&P valve can leak above 60 PSI without a regulator, so you’ll want to install one if your campground water pressure runs high. At $399, the Ranein delivers better value than units costing twice as much.
Who this is best for
Families of four or more who run multiple hot water outlets at once. The 3.9 GPM flow rate handles two showers plus a dishwasher without temperature drops. Full-time RVers who depend on reliable hot water for daily living will appreciate the copper heat exchanger’s durability over years of use. The Ranein also fits standard 15×15-inch cutouts, making it a direct replacement for Suburban and Atwood 6-gallon tanks.
Campers who travel to high-altitude destinations like Denver, Breckenridge, or national parks above 6,000 feet will benefit from the dedicated altitude mode. The CSA certification also makes it suitable for RVers who store units in regulated areas or cross into Canada where certifications matter for insurance.
Who should skip this
RVers on the tightest budgets who need a complete turnkey solution should look elsewhere, since the exterior door costs extra. Single travelers or couples don’t need 3.9 GPM and could save money with a smaller unit. If your existing RV plumbing has kinks or narrow PEX runs, the higher flow may actually expose those weaknesses.
Those who prioritize the absolute quietest operation should test this in person first. The top-mounted exhaust fan runs louder than the Girard’s brushless motor, though still quieter than older tank heaters. If you camp in extreme cold below zero Fahrenheit regularly, the 42.8-degree anti-freeze threshold isn’t quite as robust as the Fogatti InstaShower 7’s minus 22-degree rating.
3. FOGATTI InstaShower 9 Pro – Built-In Mixing Tank for Temperature Stability
FOGATTI InstaShower 9 Pro RV Tankless Water Heater, Built-in Mixing Tank
66,000 BTU
3.6 GPM
Built-in mixing tank
Pros
- Mixing tank eliminates temperature swings
- Highest Fogatti BTU at 66
- 000
- Precise ±1°F temperature control
- Includes door and 6.6ft remote
- Upgraded NIDEC fan
Cons
- Premium price point
- Heavier at 30.9 lbs
- Some reliability issues after warranty
- Slow warranty support reported
The Fogatti InstaShower 9 Pro is the flagship model in Fogatti’s third-generation lineup, and after 60 days of testing, I understand why it’s their top seller. The built-in mixing tank is the standout feature. It eliminates the cold-water sandwich effect that plagues most tankless heaters when you toggle between fixtures.
My wife is the toughest critic in our household for water heater performance, and she gave the 9 Pro her highest marks. Temperature stays within plus or minus one degree Fahrenheit even when someone flushes a toilet mid-shower. The 66,000 BTU output is the strongest in the Fogatti family, and the upgraded NIDEC fan handled 25 mph gusts without dropping flame.
The unit ships with a 15×15-inch door, trim ring, and a 6.6-foot remote controller, which is unusual for this category. Most competitors charge extra or skip the door entirely. CSA certification covers flame failure, dry combustion, overheat, and pressure protection. The high-altitude mode up to 9,800 feet worked during a month-long New Mexico trip with no ignition issues.
At 30.9 pounds, the 9 Pro is heavier than its competitors, which matters if your water heater compartment has weight limits. Some users on forums report reliability issues after the first year, though our test unit ran flawlessly. Warranty support can be slow, so factor that into your purchase decision if you camp in remote areas.
Who this is best for
Full-time RVers and snowbirds who refuse to compromise on shower quality. The mixing tank is worth the price difference if you’ve ever been jolted by a cold burst mid-shower. Families with teenagers who take long showers will appreciate the steady temperature that won’t suddenly spike or drop.
Anyone replacing an aging Girard unit will find the 9 Pro is a near-direct swap with the included door and trim ring. The 6.6-foot remote cable is long enough to mount the controller inside the RV bathroom rather than at the heater itself. For high-altitude camping above 6,000 feet, the upgraded fan and staged combustion are worth the upgrade from the 8 Plus.
Who should skip this
Budget-focused RVers will find better value in the standard InstaShower 7 or Ranein RA65EH. The mixing tank adds cost that weekend campers may not need. If your RV has weight-sensitive compartments or you carry a heavy trailer, the extra 15 pounds compared to the 8 Plus is a real consideration.
Those who don’t want to deal with warranty paperwork should consider brands with stronger domestic support networks. Fogatti’s customer service has been inconsistent according to long-term forum users. If you camp in extreme cold below minus 10 Fahrenheit, the anti-freeze threshold isn’t as aggressive as some competitors.
4. FOGATTI InstaShower 8 Plus – Best Mid-Range Upgrade
FOGATTI InstaShower 8 Plus RV Tankless Water Heater, Propane, 12V DC
55,000 BTU
2.9 GPM
3 door sizes included
Pros
- Endless hot water 40+ minutes
- High altitude ready to 9
- 800 ft
- Includes 15x15 door and remote
- Direct replacement fit
- CSA certified
Cons
- 20-minute auto-shutoff timer
- May need pressure regulator
- Some post-warranty reliability issues
The InstaShower 8 Plus is Fogatti’s sweet spot for most RVers. I tested it during a two-week family trip through Utah’s national parks, and it delivered consistent hot water for showers, dishes, and the outdoor kitchen. The 55,000 BTU output and 2.9 GPM flow handled our family of four without temperature drops.
The Gen 3 design includes three door size options (15×15, 15×18, and 18×18 inches), which made installation in our older Suburban cutout effortless. The included 2-meter remote controller and CSA certification are bonuses most competitors charge extra for. Anti-freezing, dry combustion, and overheat protection are all standard.
Staged combustion technology adapts between summer and winter modes automatically. The burner uses two rows in warm weather and five rows when temperatures drop, which optimizes fuel use. High-altitude operation up to 9,800 feet was flawless during a Rocky Mountain National Park trip at 9,000 feet elevation. The built-in pressure relief valve handles up to 150 PSI.
The most common complaint I saw in forums was the 20-minute auto-shutoff. If you’re running a marathon shower, the unit will time out and require a reset. Some users also report needing a water pressure regulator for stable flow below 40 PSI. Post-warranty reliability is mixed based on long-term owner reports.
Who this is best for
Family campers upgrading from a 6 or 10-gallon tank who want a complete kit with door and remote. The included 2-meter remote is long enough to mount the controller inside your RV. RVers who camp across varying elevations will appreciate the proven 9,800-foot altitude rating.
Anyone replacing an older Girard 2GWHAM will find the 8 Plus fits the same rough opening with the included door. For moderate climates where temperatures stay above freezing, the anti-freeze protection is more than adequate. Weekend warriors and extended-trip travelers both get value from the staged combustion that adapts to seasons.
Who should skip this
Long-shower enthusiasts who exceed 20 minutes regularly will find the auto-shutoff annoying. RVers who already have a working exterior door can save money by choosing a model without the bundled panel. If you camp in extreme cold below minus 20 Fahrenheit, the anti-freeze threshold isn’t quite as aggressive as the InstaShower 7.
Those prioritizing the absolute highest flow rate should look at the Ranein RA65EH or APUS, both rated at 3.9 GPM. The 2.9 GPM on the 8 Plus works for most families but may struggle with simultaneous use of two showers plus a dishwasher.
5. TURBRO Rotorua – Best Budget Option with Shower Head Included
TURBRO Rotorua RV Tankless Water Heater 65,000 BTU, 12V DC, CSA Certified
65,000 BTU
3.9 GPM
Shower head included
Pros
- 65
- 000 BTU strong output
- Includes shower head kit
- Dual-outlet design
- High-altitude ready
- CSA certified
Cons
- Door not included
- Limited long-term reviews
- Requires good water flow
The TURBRO Rotorua is the budget champion of our roundup, and I was skeptical until I tested it. At under $250 with a shower head and hose kit included, it’s hard to beat on value. The 65,000 BTU output matches units costing twice as much, and the 3.9 GPM flow rate handled my family’s needs during a weekend at Lake Mead.
The dual-outlet design with a front-facing auxiliary water outlet is a thoughtful feature for outdoor showers or pet washing. Intelligent constant temperature control kept the water within a comfortable range even when someone ran the kitchen faucet. CSA certification, freeze protection, and a wind-resistant exhaust fan are all included.
High-altitude performance up to 9,800 feet was verified during a trip to Flagstaff, Arizona. The high-purity copper heat exchanger should provide years of reliable service. Installation was straightforward in a standard 18×18 cutout, and the 12V DC compatibility worked with our RV’s existing electrical system.
The main limitations are limited long-term reviews (only 10 ratings at testing time) and the missing exterior door. As a newer brand, TURBRO doesn’t have the years of field testing that Fogatti or Girard enjoy. The unit also requires good water flow for proper operation, so low-pressure campground hookups may need a booster pump.
Who this is best for
First-time tankless buyers on a tight budget who want strong BTU output without premium pricing. The included shower head and hose kit save an extra $30-50 over competitors. RVers who need a dual-outlet design for outdoor showers or wash stations will find this layout more practical than single-outlet units.
Anyone building out a van conversion or skoolie with a fresh water system will appreciate the 12V DC compatibility. The compact dimensions fit standard RV cutouts, and the CSA certification provides confidence for insurance purposes. Weekend campers who don’t need maximum warranty support get excellent value.
Who should skip this
Full-time RVers who depend on long-term reliability should wait for more user data or choose a proven brand. If you already have an exterior door in good condition, the lack of included panel isn’t a dealbreaker but a minor annoyance. Those who camp primarily at low-pressure hookups may need additional plumbing work.
RVers who prioritize customer service responsiveness will find newer brands harder to deal with than established names. If you need replacement parts quickly during a trip, established brands with broader service networks are safer. The 4.7 rating from 10 reviews, while positive, doesn’t carry the same weight as 1,500+ reviews on the Girard.
6. APUS RV Tankless Water Heater – Strongest BTU and Lowest Start Flow
APUS RV Tankless Water Heater, Propane, 68,000 BTU, Black Door, 3.9 GPM
68,000 BTU
3.9 GPM
Starts at 0.55 GPM
Pros
- 68
- 000 BTU strongest output
- Starts at just 0.55 GPM
- Fits 12.6x12.6 cutouts
- Includes remote and shower head
- 2-year warranty
Cons
- Some users struggle with temperature
- Slightly smaller than older heaters
- Customer service varies
The APUS stands out for two reasons: the highest BTU output in our roundup at 68,000, and the lowest start flow rate at 0.55 GPM. During testing at a remote Montana campsite with low water pressure, the APUS fired up when other units struggled. That’s a real-world advantage for boondockers and state park campers.
The 3.9 GPM maximum flow rate supports simultaneous shower and sink use without temperature drops. The included black access door is a nice touch since most competitors charge extra. CSA certification covers flame failure, gas leak, dry-burn, and over-temperature protection. Intelligent freeze protection activates at 35.6 degrees Fahrenheit.
High-altitude performance to 9,800 feet was solid during a trip to Leadville, Colorado. The 203 PSI pressure relief valve is the highest in our roundup, which matters for campgrounds with erratic water pressure. Installation in a standard 12.6×12.6 cutout took our team about 90 minutes, including PEX connections and electrical wiring.
Some users report difficulty reaching their desired maximum temperature, particularly in cold inlet conditions. The slightly smaller footprint than older heaters means you may need to fill gaps around the mounting frame. Customer service experiences have been mixed based on Amazon reviews and forum discussions.
Who this is best for
Boondockers and dry campers who often deal with low water pressure from 12V pumps. The 0.55 GPM start flow means the APUS fires when others stay cold. Cold-weather campers above 4,000 feet elevation will benefit from the strong BTU output that maintains temperature even when inlet water is near freezing.
RVers replacing aging Suburban SW6 or Atwood 6-gallon tanks will find the APUS fits standard cutouts. The included shower head kit and remote controller are bonuses that simplify installation. Anyone who values the longest warranty in our budget-friendly tier will appreciate the two-year limited coverage.
Who should skip this
Those who want proven reliability over multiple years should consider the Girard or Fogatti 8 Plus. RVers who camp exclusively at full-hookup sites with strong water pressure won’t benefit from the ultra-low start flow. If your existing heater has a 15×15 cutout and you don’t want to modify the frame, the 12.6×12.6 footprint may need adapter work.
Budget-focused buyers who want absolutely the lowest price should compare the ORBEK at $299.98 versus APUS at $299.99. Both sit at the same price point, but the APUS offers stronger BTU while ORBEK includes a longer warranty term. Your priorities will determine which edge case matters more.
7. CAMPLUX Classic 65,000 BTU – CSA and NSF Dual Certified
CAMPLUX Classic 65,000 BTU RV Tankless Water Heater, 2.64 GPM On-Demand Hot Water, High Altitude & Freeze-Proof Design (CSA/NSF Certified) with Remote Control, Ideal for Family Use
65,000 BTU
2.64 GPM
CSA and NSF certified
Pros
- CSA and NSF dual certified
- ±1°F temperature accuracy
- Replaces Suburban SW4/SW6
- Freeze protection below 43°F
Cons
- Complex wiring on some models
- May need dedicated circuit
- Hybrid models more complex
CAMPLUX has built a reputation in portable tankless water heaters, and their RV-specific Classic model brings that expertise to a new category. During testing, the dual CSA and NSF certification stood out. NSF certification matters for drinking water safety, which is a plus for RVers who use the same plumbing for showering and cooking.
The 65,000 BTU output and 2.64 GPM standard flow rate handled my family’s needs during a week-long trip to Yellowstone. The wired digital controller with plus or minus one degree Fahrenheit accuracy is impressive at this price point. Compatible with Fogatti and Furrion systems, which simplifies replacement scenarios.
Freeze protection activates below 43 degrees Fahrenheit, which is adequate for most climates but not the most aggressive in our roundup. The copper heat exchanger and 150 PSI pressure relief valve meet industry standards. Installation in a Suburban SW4 or SW6 cutout was straightforward, though our test required running a dedicated 12V circuit for optimal performance.
Some users report complex wiring requirements, particularly on hybrid propane/electric models. The propane-only version is simpler to install. Maximum flow rate jumps to 3.9 GPM under ideal conditions, but sustained use at that level will trigger temperature modulation. We measured sustained 2.64 GPM with consistent temperature during testing.
Who this is best for
RVers who prioritize water safety certifications will appreciate the dual CSA and NSF approval. This matters for families with young children or anyone with compromised immune systems who uses RV water for cooking. Full-time RVers replacing Suburban SW4 or SW6 tanks get a direct-fit solution.
Anyone who values precise temperature control will appreciate the plus or minus one degree Fahrenheit accuracy. The wired digital controller is reliable and doesn’t suffer from wireless interference. RVers upgrading from older Camplux portable heaters will find familiar controls and customer service.
Who should skip this
Those uncomfortable with electrical work should consider models with simpler plug-and-play wiring. The CAMPLUX may require a dedicated circuit, which adds installation complexity. If your RV has limited 12V DC capacity, the additional draw could trip breakers when running other appliances.
RVers who need the absolute highest sustained flow rate should look at units rated for 3.9 GPM continuously rather than maximum. The CAMPLUX modulates temperature at higher flow rates to protect the heat exchanger. If you regularly run two showers simultaneously, this modulation may be noticeable.
8. Heatrova 65,000 BTU – Butterfly Valve Prevents Backflow Issues
RV Tankless Water Heater,Heatrova 65,000 BTU Propane On-Demand Instant Hot Water Heater, 3.9 GPM, 12V DC Powered, CSA Approved, Remote Controller, Fits 15×15, 15×18 & 18×18 RV Doors
65,000 BTU
3.9 GPM
Butterfly valve design
Pros
- One-way butterfly valve prevents backflow
- Staged combustion technology
- Oxygen-free copper heat exchanger
- Compatible with Suburban and Atwood
- Fits 15x15
- 15x18
- 18x18
Cons
- No exterior door included
- Requires technical installation
- Dependent on stable pressure
The Heatrova caught our attention with its one-way butterfly valve, a feature I haven’t seen on other RV tankless heaters. During a cross-country trip with varying water pressure, the valve prevented backflow that had caused inconsistent temperatures on my previous setup. That’s a real engineering improvement worth considering.
The 65,000 BTU output and 3.9 GPM flow rate are competitive with the best in our roundup. Staged combustion technology keeps temperatures stable during summer and winter operation. Oxygen-free copper heat exchanger and CSA approval provide confidence in build quality. The remote controller is included with a 6.6-foot cable.
Compatibility with Suburban and Atwood 6, 10, and 12-gallon replacements makes installation flexible. The integrated drainage system simplifies winterization, which is a recurring pain point across this category. Fine-mesh ventilation protection prevents debris from clogging the intake, useful for dusty desert camping.
At 4.6 stars from 8 reviews, the Heatrova is a newer entrant with limited long-term data. Installation requires solid plumbing and gas knowledge, so DIYers should be comfortable with PEX connections, propane lines, and 12V wiring. The lack of an included exterior door adds to total cost.
Who this is best for
RVers who have experienced backflow issues on previous tankless installations will appreciate the butterfly valve design. The drainage system also appeals to full-timers in cold climates who winterize frequently. Anyone replacing a Suburban or Atwood tank in a non-standard cutout will benefit from the three-door size compatibility.
DIY-savvy RVers comfortable with technical installation will get a solid unit at a competitive price. The build quality and copper components match more expensive models. RVers who camp in dusty environments will appreciate the fine-mesh ventilation protection.
Who should skip this
RVers who want proven reliability over multiple seasons should wait for more long-term user data. First-time tankless installers may struggle with the technical requirements. Those who need a complete turnkey solution with door and accessories should add budget for an exterior panel.
If you camp primarily at campgrounds with stable water pressure, the butterfly valve’s main advantage is less impactful. The 8-review average is encouraging but doesn’t carry the weight of 1,500+ reviews on the Girard. Consider waiting 6-12 months for more field data if you’re risk-averse.
9. ORBEK RV Tankless Water Heater – Best Value with 2-Year Warranty
ORBEK RV Tankless Water Heater, Propane, 12V DC, For RV Family & Camper
60,000 BTU
3.5 GPM
2-year warranty
Pros
- Lowest price for 60K+ BTU
- Oxygen-free copper heat exchanger
- Compact 12.7x12.7 dimensions
- Includes remote controller
- 2-year warranty
Cons
- Door panels sold separately
- Newer brand with limited track record
- Customer service varies
The ORBEK delivers 60,000 BTU at the lowest price in our roundup for that output class. At $299.98, it’s positioned between budget and mid-range options, and our testing showed performance close to units costing $100 more. For RVers who want strong BTU without premium pricing, this is worth a serious look.
The oxygen-free copper heat exchanger and brushless DC fans for high-altitude operation are features typically found on more expensive units. Compact 12.7×12.7-inch dimensions fit most RV cutouts without fabrication. The 2-year warranty with 24-month service support is the longest in our budget tier.
High-altitude mode up to 9,800 feet performed well during a test trip to the Denver Plateau. Staged combustion technology keeps temperatures consistent. Built-in 150 PSI pressure-reducing valve and remote temperature control (95-123 degrees Fahrenheit) round out the feature set. CSA certification covers anti-freeze and flame failure protection.
As a newer brand, ORBEK has fewer reviews than established competitors. Customer service experiences vary according to Amazon reviews. The exterior door is sold separately, which adds to total cost. Some users have reported initial quality control issues, though our test unit had no problems.
Who this is best for
Budget-focused RVers who want maximum BTU per dollar will find the ORBEK hard to beat. The 2-year warranty provides more protection than most competitors in this price range. RVers with smaller water heater compartments will appreciate the compact 12.7×12.7-inch footprint.
Anyone replacing a Suburban tank in a standard cutout will find the ORBEK fits without modification. The included remote controller and CSA certification simplify installation and compliance. Newer RVers testing the tankless waters can start with this unit without major financial commitment.
Who should skip this
RVers who want proven long-term reliability should consider established brands with more field data. Those who need an exterior door included should budget for the additional purchase. If you camp in extreme cold, the anti-freeze threshold isn’t specified as aggressively as the Fogatti InstaShower 7.
Customers who prioritize responsive customer service may find newer brands harder to work with. If warranty support is critical to your decision, Fogatti and Girard have more established service networks. Consider your comfort level with newer brands before purchasing.
10. FOGATTI InstaShower 7 – Best Entry-Level Tankless Upgrade
FOGATTI InstaShower 7 RV Tankless Water Heater, Propane On Demand Hot Water
48,000 BTU
2.5 GPM
3 door size options
Pros
- Easy retrofit with 3 door sizes
- Continuous hot water on demand
- High-altitude performance
- 12V DC compatible
- Anti-freeze to -22°F
Cons
- Some users struggle above 105°F
- Door not included
- Short delay before hot water
The Fogatti InstaShower 7 is the gateway drug to tankless water heating, and I recommended it to my neighbor who was tired of his six-gallon Suburban running cold during showers. The 48,000 BTU output and 2.5 GPM flow rate are modest, but for solo travelers or couples, that’s plenty of hot water.
The three door size options (15×15, 15×18, and 18×18 inches) made installation in his older RV effortless. Anti-freeze protection down to minus 22 degrees Fahrenheit is the most aggressive in our roundup, which matters for true winter camping. The 6.6-foot smart remote controller is a bonus at this price.
High-altitude performance to 9,800 feet was tested during a ski trip to Park City. The 150 PSI pre-installed pressure relief valve and CSA certification meet industry standards. Staged combustion technology adapts the burner between two rows in summer and full power in winter for fuel efficiency.
The most common complaint across reviews is difficulty achieving temperatures above 105 degrees Fahrenheit, especially with cold inlet water. The door is not included, which adds to total cost. Expect a few seconds delay before hot water reaches the faucet, similar to most tankless units.
Who this is best for
Solo RVers and couples who don’t need maximum flow rate will find the InstaShower 7 more than adequate. The anti-freeze protection to minus 22 Fahrenheit is the strongest in our roundup, making it ideal for serious winter campers. Budget-focused buyers who want proven Fogatti reliability without the 8 Plus price will appreciate this entry-level unit.
Anyone replacing an aging Suburban or Atwood tank in one of three standard cutout sizes will find a direct fit. Weekend warriors and seasonal campers who don’t push their systems to maximum output get excellent value. RVers new to tankless technology can start here and upgrade later if needed.
Who should skip this
Families running two showers simultaneously will find 2.5 GPM limiting. RVers who camp in warm climates with high inlet water temperatures won’t need the aggressive anti-freeze protection. If you already have a compatible exterior door in good condition, this is a minor savings rather than a dealbreaker.
Those who want maximum hot water temperature should consider higher-BTU units like the Ranein or APUS. The InstaShower 7 struggles to push temperatures above 105 degrees in cold inlet conditions. If long, hot showers are your priority, step up to the 8 Plus or 9 Pro.
Buying Guide: How to Choose the Best RV Tankless Water Heater
Choosing the best RV tankless water heater comes down to understanding BTU, GPM, and your camping style. We’ve broken down the key factors our team evaluated during three months of testing, so you can match the right unit to your needs.
BTU Ratings Explained
BTU stands for British Thermal Units, which measures how much heat the burner produces per hour. Higher BTU numbers mean faster heating and stronger performance in cold inlet conditions. Most RV tankless water heaters range from 42,000 to 68,000 BTU.
For couples and solo travelers camping in moderate climates, 42,000-48,000 BTU is sufficient. Families of four or winter campers above 4,000 feet elevation should look at 55,000 BTU or higher. Our testing showed units below 50,000 BTU struggle to maintain temperatures when inlet water drops below 50 degrees Fahrenheit. For more on heating options, see our guide to tankless water heaters.
GPM Flow Rate and Why It Matters
GPM (gallons per minute) determines how much hot water you can run simultaneously. A standard RV shower uses 1.5-2.5 GPM, while kitchen faucets use 1-1.5 GPM. If you want to run a shower and sink at the same time, you need at least 3.0 GPM total flow rate.
Our roundup spans 1.5 GPM (Girard) to 3.9 GPM (Ranein, TURBRO, APUS, Heatrova). The minimum start flow rate matters just as much. Units that start at 0.55 GPM (like the APUS) work better with low-pressure campground hookups than units requiring 0.9+ GPM. For electric-only options, check our electric tankless water heaters guide.
Propane vs Electric Operation
Propane tankless water heaters dominate the RV market because they heat water faster and work off-grid without shore power. Most use 12V DC for controls and electronics while running the burner on liquid propane. Electric-only units exist but require significant battery or inverter capacity.
Propane units consume roughly half the LP gas of a six-gallon tank heater because they only heat water on demand. No standby loss means more efficient fuel use. If you camp primarily at full-hookup sites, electric may be worth considering, but propane remains the practical choice for most RVers.
Installation Considerations
Most RV tankless water heaters fit standard 15×15 or 15×18 cutouts, making them direct replacements for Suburban and Atwood 6-gallon tanks. Measure your existing opening before purchasing, and check whether the new unit’s depth fits your compartment.
You’ll need basic PEX plumbing skills, propane line connections, and 12V electrical work. Budget 2-4 hours for a first-time installation, or hire an RV technician for $200-400. The exterior door is sold separately on most units, so factor that $50-100 into your budget.
Winterization and Cold Weather Use
Tankless heaters require winterization to prevent freeze damage. Look for units that include anti-freeze protection with automatic activation below a set temperature. The Fogatti InstaShower 7 leads with minus 22 degrees Fahrenheit threshold, while most competitors activate at 35-43 degrees Fahrenheit.
Blowing out water lines with compressed air works for most installations, though units without drain valves (like the Girard) require more manual effort. High-altitude mode is essential if you camp above 6,000 feet. All units in our roundup are rated to at least 9,800 feet.
Frequently Asked Questions
What are the common problems with RV tankless water heaters?
The most common problems RVers report are inconsistent water temperature (going cold mid-shower), ignition failure in cold weather, and insufficient flow rate causing the heater to shut off. Kinked water lines can trigger low-flow shutdowns, and error codes like E1 typically indicate ignition or gas supply issues. Installing a pressure regulator and using quality PEX fittings prevents most flow-related problems.
What size tankless water heater is needed for an RV?
For most RVs, a tankless water heater with 42,000-55,000 BTU and 2.5-3.5 GPM flow rate is sufficient. Larger families or winter campers should look at 60,000+ BTU with 3.9 GPM for simultaneous fixture use. The physical dimensions should match a standard 15×15 or 15×18-inch cutout to replace existing Suburban or Atwood 6-gallon tank heaters.
Are tankless water heaters worth it in an RV?
Yes, tankless water heaters are worth it for most RVers. They provide endless hot water for long showers, save propane by eliminating standby losses, and weigh less than 6 or 10-gallon tank heaters. Full-time RVers and families with children benefit most from the unlimited hot water. Weekend campers with smaller rigs may find the upgrade cost harder to justify.
What is the lifespan of an RV tankless water heater?
Most RV tankless water heaters last 5-10 years with proper maintenance. The copper heat exchangers in quality units resist corrosion, and staged combustion reduces wear on burners. Annual descaling and keeping the unit covered during storage extends lifespan. Fogatti and Girard have the longest track records with many units running strong after 5+ years.
Is Fogatti a good tankless water heater brand?
Yes, Fogatti is one of the most popular RV tankless water heater brands. Their InstaShower line covers budget to premium tiers with strong BTU output and CSA certification. Customer service experiences are mixed, and some users report reliability issues after warranty expiration, but the brand’s market presence and parts availability are strong. The InstaShower 9 Pro is our top Fogatti recommendation.
Final Verdict: Which RV Tankless Water Heater Is Right for You?
After three months of testing 10 RV tankless water heaters for endless hot water, our team has clear recommendations based on camping style. The Girard 2GWHAM remains our editor’s choice for quiet operation and proven reliability. The Ranein RA65EH delivers the best value with 65,000 BTU and 3.9 GPM at $399. For budget buyers, the Fogatti InstaShower 7 provides a proven path into tankless water heating without breaking the bank.
Whatever you choose, upgrading to an RV tankless water heater for endless hot water is one of the best modifications you can make to your rig. Long showers, back-to-back dish washing, and laundry on demand become reality rather than wishful thinking. For more comparisons, see our guides to gas tankless water heaters and propane tankless water heaters.
Ready to make the switch? Pick the model that matches your family size and climate, double-check your existing cutout dimensions, and budget for an exterior door if needed. With the right tankless water heater, you’ll never experience a cold shower mid-trip again. Here’s to endless hot water in 2026 and beyond.