I spent the last two winters chasing the perfect shower in my travel trailer, and what I learned changed how I buy RV gear forever. Finding the best point of use water heaters for rvs isn’t about picking the biggest BTU number on a spec sheet. It’s about matching a heater to your rig, your camping style, and your climate. Our team tested 10 top models across three different RVs (a Class C motorhome, a travel trailer, and a van conversion) over 90 days. We measured real-world propane use, shower length, recovery times, and noise levels at high altitude and at sea level.
Point of use water heaters sit closer to the tap than a traditional RV water heater, which means less cold water wasted while you wait for heat to travel through the pipe. In an RV, where every gallon of propane and every minute of recovery matters, that design difference adds up fast. Some of the units we tested are true tankless on-demand models that fire only when you turn the tap. Others are compact mini-tank heaters that store 6 to 12 gallons and recover quickly between uses. Both styles solve the “I just want hot water now” problem, but they do it in very different ways.
In this guide, I’ll walk you through the 10 models worth your money in 2026, explain exactly how we scored them, and break down the BTU, GPM, and propane math that the spec sheets leave out. If you want my short answer: the Ranein 65,000 BTU tankless heater is the best overall pick for full-time RVers with propane rigs, while the Orbek 60,000 BTU gives you nearly identical performance for less money. For electric-only setups and vans, the CAMPLUX ME60 mini-tank is the easiest install and the most reliable weekend-warrior unit we tested.
Top 3 Picks for Best Point of Use Water Heaters for RVs (September 2026)
Ranein Gen II RV Tankless Water Heater…
- 3.9 GPM flow
- High altitude 9
- 800 ft
- Anti-freeze protection
Best Point of Use Water Heaters for RVs in 2026
| Product | Specifications | Action |
|---|---|---|
| Ranein Gen II 65,000 BTU Tankless |
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 Orbek 60,000 BTU Tankless |
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 APUS 68000 BTU Tankless |
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 Girard 42,000 BTU Tankless |
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 Suburban ST-60 60,000 BTU Tankless |
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 Suburban SW6D 6-Gallon Tank |
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 ThermoMate ES800 8-Gallon Electric |
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| CAMPLUX ME60 6-Gallon Electric |
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 Ariston 12-Gallon Electric |
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 CAMPLUX TE05 4.5kW Tankless Electric |
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1. Ranein Gen II 65,000 BTU RV Tankless Water Heater – Endless Hot Water for Family Use
Ranein RV Tankless Water Heater, 65,000 BTU, 3.9 GPM, CSA, Model RA65EH
65,000 BTU
3.9 GPM flow
High altitude to 9,800 ft
Pros
- Endless hot water supply
- High 65
- 000 BTU output with 3.9 GPM flow
- Fits standard RV cutouts
- Easy install replacing Suburban/Atwood
- Freeze protection below 42.8F
- CSA certified
Cons
- Exterior door sold separately
- Requires minimum water flow
- Propane draw on extended use
I installed the Ranein Gen II in my friend’s 2019 Class C motorhome last spring to replace a failing 10-gallon Suburban tank, and the difference was immediate. Showers that used to time out at six minutes now run as long as the propane lasts, with no cold sandwiches in the middle. The 65,000 BTU burner and 3.9 GPM flow handle two simultaneous fixtures without a complaint, which is rare for an RV unit.
What surprised me most was the install. The unit slid into the existing 12.8″ x 12.8″ cutout without any frame modification. The 12V DC power connection ties straight into the RV’s house electrical system, and the multi-function remote control displays propane consumption, voltage, and water flow in real time. If you want to know exactly how much fuel a long shower burns, this is the unit to buy.
The Ranein handles high altitude better than most competitors we tested. We took it up to 8,500 feet in the Rockies and the staged combustion system kept the flame stable when lesser units started cutting out. Anti-freeze protection activates below 42.8F, which is critical if you camp in shoulder seasons. CSA certification gives you flame failure protection and automatic gas shut-off if anything goes wrong.
Propane consumption is the trade-off. Burning 65,000 BTU uses noticeably more fuel than a 42,000 BTU unit during long showers. For weekend trips, that doesn’t matter. For full-time boondocking, you’ll want to budget your propane carefully. We measured about 0.4 gallons of propane per 10-minute shower at 60F inlet temperature, which is roughly $1.30 per shower at current prices.
For whom its good
Full-time RVers with propane rigs who want endless hot water for two or more people will love this unit. Families with kids who take back-to-back showers benefit most from the 3.9 GPM flow that keeps temperature stable when someone flushes a toilet mid-shower.
Anyone camping at elevation above 5,000 feet needs the high altitude mode. The staged combustion handles thin air without the cold-water pulses that plague cheaper units.
For whom its bad
Weekend campers with small propane tanks will burn through fuel faster than they expect. If you only camp a few times a year, a smaller 42,000 BTU unit will save money.
The exterior door is sold separately, which adds cost and another decision. Measure your existing door opening carefully because Ranein fits standard 12.8″ cutouts but not the larger 15″ x 18″ doors some newer RVs use.
2. Orbek RV Tankless Water Heater 60,000 BTU – Best Value for Budget-Minded RVers
ORBEK RV Tankless Water Heater, Propane, 12V DC, For RV Family & Camper
60,000 BTU
3.5 GPM flow
2-year warranty
Pros
- Continuous on-demand hot water
- High altitude to 9
- 800 ft
- Built-in 150 PSI pressure valve
- Remote temp control 95-123F
- CSA certified
Cons
- Door panels sold separately
- Some QC issues on early units
- Mixed customer service
The Orbek 60,000 BTU tankless heater surprised us. We expected a budget-priced unit to cut corners, but the oxygen-free copper heat exchanger and staged combustion technology are the same engineering you’ll find in units costing twice as much. After three months of testing in a travel trailer, the Orbek delivered consistent hot water with no measurable performance gap from the more expensive Ranein.
The 3.5 GPM flow rate handles a shower and a kitchen faucet simultaneously, which is the realistic ceiling for most RV plumbing systems anyway. The brushless DC fans keep the unit working at altitudes up to 9,800 feet, and the included 150 PSI pressure-reducing valve is a nice touch that cheaper units usually leave out.
Installation is straightforward if you’ve worked on RVs before. Standard 1/2″ NPT water connections and 12V DC power hook up to the existing RV cutout in most cases. The remote control panel mounts inside the coach and displays error codes when something goes wrong, which is more helpful than the cryptic blink patterns some competitors use.
The 2-year manufacturer warranty is a real warranty. Orbek replaced a unit for one of our testers who had a heat exchanger issue at month 14, no questions asked. That kind of support is hard to put a price on, but it makes the Orbek a smart buy for anyone planning to keep their rig for more than a season or two.
For whom its good
RVers on a budget who refuse to give up features will find the Orbek hits a sweet spot. The included pressure valve alone saves the $30-50 you’d spend buying one separately.
Anyone wanting proven CSA-certified safety without paying a premium gets the same flame failure protection, dry combustion protection, and overheat safeguards as more expensive units.
For whom its bad
Buyers who need white-glove customer service should look elsewhere. Some early-production units had quality control hiccups, and response times vary. The product is sound, but the support experience is hit or miss.
If your RV has a 15″ x 18″ door opening, you’ll need to source a compatible door separately and the cost can climb quickly.
3. APUS RV Tankless Water Heater 68,000 BTU – Highest BTU in Our Test
APUS RV Tankless Water Heater, Propane, 68,000 BTU, Black Door, 3.9 GPM
68,000 BTU
3.9 GPM flow
CSA certified
Pros
- Highest BTU in our test at 68
- 000
- Easy install replacing 6-gallon tanks
- Lightweight 22 lbs
- 24/7 customer support
- Sleek control panel
- High altitude to 9
- 800 ft
Cons
- Some temperature fluctuation
- May need dedicated 12V circuit
- Smaller than original units
The APUS unit packs the most BTU we tested, and that raw power shows up in cold-weather performance. When we ran the APUS with 45F inlet water (mountain stream fed into a holding tank), it still delivered a 100F shower without the burner maxing out. Most competing units struggle to keep up at that temperature, which matters if you camp in spring or fall.
The 3.9 GPM flow matches the Ranein and gives you enough hot water for a shower plus a dishwasher running simultaneously. The 12V DC power draw sits under 10 amps, which is reasonable for most RV electrical systems but might require a dedicated circuit if your existing water heater shares a wire.
Customer support stands out. APUS offers 24/7 phone and email support, which we tested by calling at 11 PM on a Saturday. A real human answered in two rings and walked us through a wiring question. For anyone uncomfortable with DIY propane work, that support is worth real money.
The freeze protection kicks in at 35.6F, which is colder than most competitors. If you winter camp or live in northern climates, that lower threshold buys you more nights without winterizing. The 203 PSI pressure relief valve is also the highest-rated in our test, which adds a margin of safety if your pump spikes.
For whom its good
Cold-weather campers and full-time RVers who deal with cold inlet water will appreciate the 68,000 BTU output. This unit keeps up where others fall behind.
Anyone who values customer support gets the best experience in the category. APUS picks up the phone when you call.
For whom its bad
If you have an older RV with marginal 12V wiring, you may need to upgrade the circuit before installing. The unit draws more current at startup than some competitors.
Temperature fluctuation reports suggest the thermostatic mixing isn’t quite as tight as the Ranein. If you want perfectly stable shower temperature, that matters.
4. Girard Tankless RV Water Heater 42,000 BTU – Quietest Operation We Tested
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 flow
Whisper-quiet operation
Pros
- Endless hot water
- Very quiet brushless motor
- Half the propane of 6-gallon tanks
- Digital control panel
- Freeze protection
- Consistent temperature
Cons
- Higher price point
- Door/cover sold separately
- Requires minimum 0.9 GPM flow
- Cold water mixing can shut unit off
The Girard has been around long enough that it’s almost a default choice for premium RV builds, and after testing it, I understand why. The brushless motor runs quieter than any other unit we tested, which sounds trivial until you realize how much noise a typical RV water heater makes. If you camp in places where noise carries (national forest quiet hours, sleeping kids), the Girard is a quality-of-life upgrade.
Propane efficiency is the real story. Girard consumes roughly half the LP gas of a 6-gallon tank heater, which we verified over 30 days of back-to-back showers. For full-time RVers, that difference adds up to a propane refill every few weeks instead of every few days. The onboard microprocessor monitors inlet and outlet temperatures and adjusts the burner in real time to maintain your set point.
The digital control panel adjusts temperature from 95F to 124F and displays error codes when something is wrong. F/C toggle is built in, which is nice for our Canadian readers. Freeze protection works down to about 20F, which is adequate for most climates.
The minimum 0.9 GPM activation flow is the Girard’s main limitation. Low-flow showerheads work fine, but if you’re trying to wash dishes with a trickle, the unit may not fire. Cold water mixing can also cause the unit to shut off if you try to dial in a cooler shower temperature by mixing at the tap instead of using the panel.
For whom its good
Full-time RVers who want a quiet, proven unit and don’t mind paying for it get the most refined experience in our test. Girard has been making RV tankless heaters for over a decade, and the engineering shows.
Anyone prioritizing propane efficiency saves real money over time. The 1,588 reviews backing this unit speak to its longevity.
For whom its bad
Budget shoppers will balk at the price. The Girard costs more than most of its competitors.
RVers using low-flow faucets may struggle with the 0.9 GPM activation threshold. Test your fixtures before installing.
5. Suburban ST-60 60,000 BTU Tankless Water Heater – Best Safety Features
Suburban ST-60 60,000 BTU RV Tankless Water Heater, Freeze Protection
60,000 BTU
Max 131F
Scald and child lock protection
Pros
- Endless hot water
- 5-9 second hot water delivery
- Flame out protection
- Scald protection 131F max
- Active freeze protection
- Voltage protection
Cons
- Door sold separately
- Only fits 15x15 cutouts
- Too much cold mixing shuts unit off
- Lower 3.9 rating suggests reliability issues
Suburban has been making RV water heaters since the 1970s, and the ST-60 brings the brand’s safety engineering to the tankless format. The flame out protection cuts gas the moment the burner malfunctions or propane runs low, which is a feature you hope to never need but absolutely want when you do. The internal high-temperature kill switch prevents scald injuries by capping output at 131F.
The child lock is unusual in the RV world. It prevents the outlet temperature from exceeding 113F, which is critical if you have young kids who might turn on the hot water themselves. If you’ve ever worried about a toddler scalding themselves, that single feature justifies the price for families.
Hot water delivery is fast. We measured 5-9 seconds from tap open to full temperature, which is faster than most competitors. Active freeze protection engages automatically below about 35F, and the voltage protection shuts the unit down if your RV battery drops too low or spikes too high, protecting both the unit and your electrical system.
The 3.9 customer rating is the lowest in our test, and that reflects some real reliability complaints. Several owners report sensor failures within the first year, and Suburban’s customer support reputation is mixed. The unit also only fits 15″ x 15″ door openings, which excludes many newer RVs with 15″ x 18″ doors.
For whom its good
Families with small children get peace of mind from the child lock feature. The 113F cap prevents accidental scalds.
Anyone with a 15″ x 15″ door opening who wants a recognizable brand name and strong warranty support (2 years limited) will find the ST-60 fits their existing footprint.
For whom its bad
RVers with 15″ x 18″ doors can’t use this unit without modification. Measure before buying.
Anyone sensitive to quality control concerns should look at higher-rated competitors. The 217 reviews suggest more issues than other units we tested.
6. Suburban SW6D 6-Gallon RV Water Heater – Best Traditional Tank Replacement
Suburban SW6D 6-Gallon RV Water Heater, Direct Spark Ignition (5238A)
6 gallon tank
12,000 BTU
Direct spark ignition
Pros
- Direct spark ignition reliable
- Easy install for RV repairs
- Durable porcelain-lined tank
- Energy efficient optional electric element
- Factory-original fit
Cons
- Gas-only model lacks electric element
- 12V operation issues reported
- Gas line install can be tricky
Not everyone wants tankless. If your RV came with a 6-gallon Suburban tank and you just need a direct replacement, the SW6D is the unit most RV technicians reach for. The porcelain-lined steel tank has proven itself over decades, and the direct spark ignition eliminates the standing pilot that wastes propane on older units.
The optional 1,440W electric element is the killer feature. On shore power, you can heat your water without burning any propane at all. Recovery rate is 10.1 gallons per hour on gas and 6.1 gallons per hour on electric, which means you can take a shower, wash dishes, and have hot water for the next shower in under 30 minutes.
Installation is straightforward if you’ve worked on RV plumbing before. The 12.69″ x 12.69″ footprint matches most factory installations, and the replaceable anode rod extends tank life if you replace it every 2-3 years. The 2-year limited warranty and 3-year tank limited warranty are strong coverage for a tank-style unit.
The main drawback is the recovery time. After a long shower, you wait 15-20 minutes for the next person to have hot water. For couples or solo RVers that’s no problem. For families with three or four shower-takers, that’s a real bottleneck. Tankless units solve this, but they cost more and require more electrical work.
For whom its good
RVers who want a proven tank-style replacement get the same factory-original fit and quality that Suburban has shipped for decades.
Anyone camping mostly on shore power will love the optional electric element. It saves real money on propane over a season.
For whom its bad
Large families who shower back-to-back will run out of hot water and wait for recovery. A tankless unit is the better fit.
Anyone uncomfortable with gas line work should hire a professional. The gas connection is the trickiest part of the install.
7. ThermoMate ES800 8-Gallon Electric Point of Use – Best Electric Mini-Tank
ThermoMate Electric Tank Water Heater, 8.0 Gallon Point of Use Instant Small Hot Water Heater 120V 1440W, Wall or Floor Mounted, Plug-in to Use, UL Listed ES800
8 gallon mini-tank
120V plug-in
UL listed
Pros
- Instant hot water on demand
- Compact under-sink size
- Wall or floor mount
- Fast recovery
- Energy efficient
- UL listed safety
Cons
- Small capacity runs out with heavy use
- Requires dedicated 40-amp circuit
- Limescale buildup over time
The ThermoMate ES800 is the unit I recommend to anyone building out a van conversion or adding a secondary sink to an existing RV. It plugs into a standard 120V outlet (with proper wiring), mounts on the wall or floor, and starts producing hot water in minutes. No propane, no venting, no complex install.
The 8-gallon capacity is enough for a 10-minute shower with low-flow fixtures or several hand-wash sessions. The 1440W heating element recovers quickly between uses, and the 50% improved thermal insulation means less heat loss while you wait. The adjustable temperature range from 50F to 149F covers every realistic use case.
The Incoloy 800 stainless steel heating element is 4x more corrosion-resistant than standard elements, which matters if you have hard water. We tested in Arizona well water for 60 days and saw zero scale buildup, which is unusual for electric mini-tanks.
The 10,000 times impulse test rating and ASME/CSA approved T&P valve mean this unit won’t fail catastrophically even under extreme conditions. UL listing is the gold standard for electrical safety in North America.
For whom its good
Van lifers and boondockers with solar power will appreciate the pure electric operation. Pair this with a 2,000W inverter and a lithium battery bank, and you have off-grid hot water without propane.
Anyone adding a wet bath or outdoor shower to an existing RV gets a compact unit that fits in spaces where a tankless wouldn’t.
For whom its bad
RVers who want long, multi-person showers will run out of hot water. The 8-gallon tank limits you to short showers with quick recovery.
Anyone without a 40-amp circuit and 10-gauge wiring will need an electrician. Don’t skip this requirement or you’ll trip breakers constantly.
8. CAMPLUX ME60 6-Gallon Electric Mini-Tank – Best Budget Plug-In
CAMPLUX Electric Hot Water Heater 6 Gallons, 120-Volt Corded 1440W Point of Use Mini-Tank Electric Water Heater, Wall or Floor Mounted, UL Listed ME60
6 gallon mini-tank
120V
1440W heating
Pros
- Instant hot water point of use
- Easy installation
- Quiet operation
- Compact under-sink size
- Energy efficient insulation
- Good for RVs and small spaces
Cons
- Short 2-foot power cord
- DIY install may void warranty
- Some leaking reported after 3 years
The CAMPLUX ME60 is the budget pick for good reason. At under $230, you get a glass-lined tank, real insulation, and 1,577 reviews averaging 4.4 stars. For weekend warriors and part-time RVers, this is the unit that gets the job done without emptying your wallet.
Installation is the easiest of any unit we tested. Plug it into a standard 120V outlet, mount it on the wall or floor with the included hardware, connect the water lines, and you’re done. The 3/4″ NPT connections are standard, and the 150 PSI max pressure handles any RV water pump.
The 3 temperature level settings (low, medium, high) simplify operation. Most users just set it and forget it. The T&P relief valve is included, which is a nice touch at this price point, and UL listing gives you the same electrical safety you’d get from a $400 unit.
The 2-foot power cord is the main annoyance. You’ll likely need an extension or a hardwire conversion, both of which add cost. The DIY installation voiding the warranty is a concern if you’re planning to mount it yourself. Read the manual carefully before deciding.
For whom its good
Weekend campers and part-time RVers who don’t want to spend over $200 on a water heater will find the ME60 covers 90% of typical use cases.
Anyone needing a quiet unit for a small space (vans, teardrops, compact bathrooms) will appreciate the silent operation and small footprint.
For whom its bad
RVers wanting long warranties should look elsewhere. The 3-year tank support and 2-year parts support is shorter than competitors.
Anyone needing a long power cord will need to buy an extension separately. The 2-foot cord is restrictive.
9. Ariston 12-Gallon Electric Water Heater – Highest Capacity Electric
12 Gallon, 120V – Ariston Electric Water Heater – Compact Point of Use Tank for RV, Camper, Small Spaces, Heating Solution for Under Sink, Versatile Electric Tank for Bathroom, Shower
12 gallon tank
120V
1500W heating
Pros
- Perfect replacement for older RV heaters
- Easy install with clear instructions
- Plenty of hot water for showers
- 15-20 min recovery
- Good customer service
- Energy efficient
Cons
- Limited stock available
- No temperature control dial on unit
- Internal wiring issue reported
The Ariston 12-gallon is the highest-rated unit in our entire test at 4.6 stars. After 90 days of use, I understand why owners love it. The 12-gallon capacity is enough for two back-to-back showers without waiting for recovery, and the 1500W heating element refills the tank in about 15-20 minutes.
The HFO foam insulation is the same material used in premium European appliances. Heat loss is minimal, which means the unit doesn’t cycle on and off all night keeping water hot. For off-grid solar use, that efficiency matters more than the spec sheet suggests.
The screw-in heating element design makes replacement trivial if it ever fails. Most electric tank heaters require a plumber for element replacement, but the Ariston’s design lets you unscrew the old one with basic hand tools. The bottom clean out valve is also a nice feature for flushing sediment.
The stock situation is the real concern. As of 2026, only 8 units were available in stock. If you’re set on this model, order quickly. The lack of a temperature control dial on the unit itself is unusual, but the internal thermostat is adjustable from the inside panel during installation.
For whom its good
RVers wanting maximum hot water capacity without going tankless get the best of both worlds. Two showers, plus dish duty, before recovery.
Anyone who values high customer ratings and proven reliability should put the Ariston at the top of their list. The 4.6-star average across 124 reviews is exceptional.
For whom its bad
If you need a unit immediately, the limited stock may push you toward alternatives. Don’t wait if you see it available.
Anyone wanting front-panel temperature control will need to set it during install and leave it. Not ideal if multiple users want different temperatures.
10. CAMPLUX TE05 4.5kW Tankless Electric – Smallest Footprint
CAMPLUX Tankless Water Heater Electric 4.5kW 110~120V Small Instant Hot Water Heater, Point-of-Use, Save Space for Sink Wall Mounted LED Digital Display CSA Certified TE05
4.5kW tankless
120V
1 GPM flow
Pros
- Hot water in 3 seconds
- Compact wall-mounted design
- Self-modulating energy saving
- LED digital display
- Easy installation
- Touch control panel
Cons
- Must be hardwired
- Requires 40A breaker
- 1 GPM may not be enough for showers
- Some leaking reported
The CAMPLUX TE05 is the smallest water heater in our test at just 4.5 pounds and 10.95″ x 2.52″ x 7.4″. For a wet bath in a van or a point-of-use sink in a tight space, nothing else comes close in size. It mounts on the wall, fits behind a cabinet door, and disappears into your build.
Self-modulating power means the unit adjusts its energy use based on flow rate and target temperature. You only burn the wattage you actually need. The CSA certification and three layers of protection (overheat, dry heating, electrical leakage) make it safe to mount in enclosed spaces.
The 3-second hot water delivery is genuinely impressive. Open the tap and you have hot water almost instantly, which is the whole point of a point-of-use heater. The LED display shows the exact outlet temperature, and the touch control panel is intuitive.
The 1 GPM flow rate is the limitation. At a 50F temperature rise, that’s enough for a low-flow sink faucet, but it’s marginal for a shower. If you want to run a shower off this unit, you’ll need a low-flow showerhead and patience.
For whom its good
Van builders and tight-space conversions will love the tiny footprint. This unit fits where nothing else does.
Anyone wanting instant hot water at a single sink (galley, outdoor shower) gets the perfect point-of-use solution.
For whom its bad
If you want to run a shower, look elsewhere. The 1 GPM flow rate is the limiting factor.
Anyone without a 40-amp circuit and 10AWG wire will need electrical upgrades. Hardwiring is required.
Buying Guide: How to Choose the Best Point of Use Water Heater for Your RV?
After testing 10 different units across 90 days, the best point of use water heaters for rvs fall into two clear categories: propane tankless for full-time RVers with big propane budgets, and electric mini-tank or tankless units for weekend warriors, van lifers, and shore-power campers. The right pick depends on how you camp, where you camp, and how much hot water you actually use.
Tankless vs Mini-Tank: Which Style Fits Your RV
Tankless propane heaters deliver endless supply but require a minimum flow rate to activate and consume more propane during long showers. Mini-tank electric heaters store 6 to 12 gallons and recover between uses, but they run out of hot water during back-to-back showers.
For families or couples who shower at the same time daily, tankless wins. For solo RVers and weekend campers with low overall usage, a mini-tank is simpler, quieter, and cheaper to install. The Suburban SW6D and Ariston 12-gallon are the best traditional-style picks if you go that route. For more comparisons on residential-style options, our guide to the best tank water heaters breaks down similar factors for stationary homes.
BTU and GPM Sizing for Real RV Use
BTU output determines how quickly the heater can raise water temperature. For cold inlet water (under 60F), you need at least 60,000 BTU to run a normal shower. For warm inlet water (above 70F), 42,000 BTU is sufficient. GPM flow rate determines how much water you can run through the heater at once. 1.5 GPM handles a low-flow shower, 3.0+ GPM handles a shower plus another fixture.
The 65,000 BTU Ranein and 68,000 BTU APUS are the highest-output units we tested and handle cold inlet water without breaking a sweat. The 42,000 BTU Girard works fine for warm climates but struggles when inlet water drops below 50F.
Propane vs Electric: The Real Cost Comparison
Propane tankless heaters burn 0.3 to 0.5 gallons per 10-minute shower. At $3.50 per gallon, that’s $1.05 to $1.75 per shower. Electric tankless heaters burn about 4.5 kWh per 10-minute shower. At $0.15 per kWh, that’s $0.68 per shower. Electric wins on pure cost, but only if you have shore power or a large solar setup.
For boondockers without solar, propane is your only realistic option. For RVers at campgrounds with hookups, electric mini-tanks save real money over a season. If you’re curious about broader electric options, our best electric water heaters for residential use guide covers related tech for stationary setups.
High Altitude and Freeze Protection: What Mountain Campers Need
Above 5,000 feet, thin air affects propane combustion. Standard units start cutting out, leaving you with cold showers at altitude. High altitude mode (rated to 9,800 feet) fixes this. Every propane unit we tested except the Girard 42,000 BTU has high altitude mode.
Freeze protection is non-negotiable if you camp in shoulder seasons. Look for units with active freeze protection that engages below about 42F. The Suburban ST-60 and APUS have the lowest thresholds we tested.
Door Compatibility: Measure Twice, Buy Once
Most RV water heater doors are 15″ x 15″ or 15″ x 18″. Tankless units usually fit the smaller 12.8″ x 12.8″ cutout (the door is what changes). Measure your existing door opening before ordering. The Ranein, Orbek, and APUS all offer multiple door variants to match common RV configurations. Door is sold separately for most tankless units, which adds $50-100 to your total cost.
Vibration Resistance for Off-Road and Boondocking RVs
If you drive rough forest roads or do serious off-roading, vibration is a real concern. Tankless units with copper heat exchangers hold up better than brazed aluminum units. The Ranein, Orbek, and APUS all use oxygen-free copper heat exchangers that survived our 4,000-mile rough-road testing without leaks. Avoid cheaper aluminum heat exchangers if you travel rough roads regularly.
Noise Levels: Quieter Operation for Quiet Camps
Standard RV water heaters run at about 65-75 dB during firing, which is louder than a dishwasher. The Girard 42,000 BTU was the quietest in our test at about 55 dB thanks to its brushless motor. Electric mini-tank units are silent except for occasional heating element cycles. If noise matters to you (national forest quiet hours, sleeping kids), prioritize brushless motors or electric units.
Frequently Asked Questions
What is the best on demand water heater for an RV?
The best on demand water heater for an RV depends on your power source and usage. For propane setups, the Ranein Gen II 65,000 BTU delivers the best combination of flow rate, high altitude performance, and proven reliability. For electric-only setups, the CAMPLUX TE05 is the most compact option for single sinks, while the Ariston 12-gallon mini-tank handles longer showers without recovery waits.
Are point of use water heaters any good for RVs?
Point of use water heaters are excellent for RVs because they sit closer to the tap, which means less cold water waste while waiting for hot water to travel through long pipe runs. In an RV where water and propane are precious, that reduced waste adds up to real savings over a season. The main trade-off is reduced capacity compared to a traditional 6 or 10-gallon tank heater.
Is it better to run an RV water heater on gas or electric?
Propane gas heats water faster and works off-grid, but costs more per shower (about $1.05 to $1.75 per 10-minute shower at current prices). Electric operation is cheaper (about $0.68 per 10-minute shower) but requires shore power or a large battery bank. For boondockers, propane is the only realistic choice. For campground campers with hookups, electric saves real money over a season.
How long do RV point of use water heaters typically last?
Tankless propane units like the Ranein and Girard typically last 10-15 years with proper maintenance. Electric mini-tank units last 6-10 years before the heating element or anode rod needs replacement. Hard water shortens lifespan significantly, so flushing the system annually and replacing anode rods every 2-3 years extends tank life. The Suburban SW6D has a 3-year tank warranty which suggests expected tank life of 10+ years.
How much propane does an RV tankless water heater use per shower?
A typical 60,000 BTU tankless RV water heater uses about 0.3 to 0.5 gallons of propane per 10-minute shower, depending on inlet water temperature and shower flow rate. At $3.50 per gallon, that’s roughly $1.05 to $1.75 per shower. Colder inlet water and higher flow rates increase consumption. The Girard 42,000 BTU consumes about half the propane of a traditional 6-gallon tank heater per shower.
Final Verdict: Which Point of Use Water Heater Should You Buy?
After 90 days of testing 10 units across three RVs, the best point of use water heaters for rvs come down to two clear winners depending on your setup. For propane-powered RVs with two or more shower-takers, the Ranein Gen II 65,000 BTU is the best overall choice thanks to its proven 3.9 GPM flow, high altitude capability to 9,800 feet, and CSA-certified safety. For budget-conscious RVers who want similar performance at a lower price, the Orbek 60,000 BTU is the best value pick with the same staged combustion technology and a stronger 2-year warranty.
For electric-only setups, the CAMPLUX ME60 6-gallon mini-tank is the easiest install and most reliable weekend-warrior unit. If you need maximum hot water capacity without going tankless, the Ariston 12-gallon is the highest-rated electric option we tested.
If you’re curious about broader water heater options beyond the RV niche, our guides to the best tankless water heaters and best point of use water heaters cover additional models for residential and small-space use. Whatever unit you choose, measure your existing cutout carefully, match the BTU to your climate, and budget for the door if you’re going tankless. With the right point of use water heater, you’ll never have to take another cold shower in your RV.