After researching manufacturer specifications, industry safety standards (ANSI Z21.10.1/CSA 4.1), and thousands of aggregated owner reviews, we compared the top RV hot water heaters on the market. Our evaluation focuses on heating performance, durability, ease of installation, safety features, and overall value. Whether you need a propane tank model, an electric unit, or a tankless system, this guide highlights real strengths and honest limitations to help you choose.
| Photo | Product | Score | Buy |
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Suburban 520891 Nautilus SW6DE Best Overall 6-gallon, gas/electric, 12,000 BTU, 10,000-hour burner life |
9.0 | 🛒 Check Price |
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Atwood (Dometic) G6A-7E Best Value 6-gallon, propane only, 12,000 BTU, auto ignition |
8.4 | 🛒 Check Price |
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Girard 2GWHAM Tankless Water Heater Best Tankless Tankless, propane, 60,000 BTU, 1.5 GPM flow rate |
8.7 | 🛒 Check Price |
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Bosch Tronic 3000 T 2.5-Gallon Best Electric 2.5-gallon, 120V electric, 1440W, 6.25 amps |
8.1 | 🛒 Check Price |
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Suburban SW10DE High Capacity 10-gallon, gas/electric, 12,000 BTU, 1440W |
8.8 | 🛒 Check Price |
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Camp Chef Triton 2-Burner Stove Portable Option Portable, propane, 1.5 GPM, battery ignition |
7.8 | 🛒 Check Price |
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EccoTemp i12-LP Portable Tankless Outdoor Shower Portable, propane, 1.5 GPM, 42,000 BTU |
7.3 | 🛒 Check Price |
1. Suburban 520891 Nautilus SW6DE: Best Overall
In our evaluation of the Suburban 520891 Nautilus SW6DE, we found it to be a well-rounded choice for most RVers. Based on the spec sheet, it offers both propane and electric heating, which is ideal for campgrounds with hookups or boondocking. Owner feedback consistently praises its reliability and the 10,000-hour burner life. The direct spark ignition eliminates standing pilot light issues, and the high-altitude kit is a plus for mountain travelers.
However, this unit is not without limitations. At 28 pounds, it is heavier than some tankless options, and the 6-gallon tank may run short for extended showers. RVers with very high hot water demand should consider a tankless model or a larger tank. We also note that the electric element heats slower than propane, so planning is needed for electric-only operation.
- Dual power: propane and 120V AC electric for flexible use
- Direct spark ignition with electronic control board for reliable startup
- High-altitude capable with adjustable gas orifice
Pros: Proven brand with widespread dealer support; Quiet operation and consistent water temperature
Cons: Heavier than some competitors at 28 lbs
2. Atwood (Dometic) G6A-7E: Best Value
The Atwood G6A-7E, now branded under Dometic, is a staple in the RV industry. We compared its specifications and found it offers solid propane heating at a competitive price point. Owner reviews highlight its straightforward installation and reliable auto ignition. The safety lockout feature meets ANSI standards and provides peace of mind. For budget-conscious RVers who primarily use propane, this is a strong candidate.
That said, the lack of an electric element is a significant drawback for those who want to conserve propane at campgrounds with hookups. Additionally, several owners reported the plastic drain plug can fail after a few seasons, so we recommend upgrading to a brass plug. RVers needing dual fuel flexibility should skip this model.
- Compact design fits many RV cutouts without modification
- Automatic ignition with safety lockout
- Aluminized steel burner for corrosion resistance
Pros: Affordable and widely available; Easy DIY replacement for older Atwood models
Cons: No electric heating option; Plastic drain plug prone to cracking
3. Girard 2GWHAM Tankless Water Heater: Best Tankless
Our research into tankless options led us to the Girard 2GWHAM, which is a popular choice among full-time RVers. Based on the manufacturer’s specs, it delivers 60,000 BTU and can provide up to 1.5 GPM, which is sufficient for one shower at a time. Owner feedback emphasizes the convenience of endless hot water and the space savings. The electronic ignition and freeze protection add to its usability in varied climates.
However, we found that temperature stability can be an issue if your RV’s water pressure varies, and some owners report a cold water sandwich effect when the burner cycles. Also, the propane consumption is higher than a tank heater during continuous use. This unit is best for those who prioritize unlimited hot water over fuel efficiency and are willing to manage water pressure.
- Endless hot water on demand with no recovery time
- Compact and lightweight at 14 lbs
- Electronic ignition with freeze protection
Pros: Saves space and weight compared to tank models; Unlimited hot water for back-to-back showers
Cons: Inconsistent temperature if water pressure fluctuates; Requires more propane at high flow rates
4. Bosch Tronic 3000 T 2.5-Gallon: Best Electric
The Bosch Tronic 3000 T is a small electric water heater designed for sinks or small RVs. In our evaluation, it stands out for its easy installation and low electrical demand, making it a good fit for pop-up campers or van conversions. The dual thermostats and safety valve meet UL standards. Owner reviews note it works well for hand washing and quick rinses.
However, the 2.5-gallon capacity is too small for showers or dishwashing. Recovery takes roughly half an hour, so it’s not suitable for back-to-back use. We recommend this only for RVers with minimal hot water needs or as a dedicated sink heater. Anyone wanting a full shower experience should look at larger units.
- Ultra-compact for tight spaces
- Glass-lined tank with dual thermostats
- Temperature and pressure relief valve included
Pros: Simple plug-and-play installation; Low power draw works with most RV electrical systems
Cons: Very limited hot water capacity (2.5 gallons); Slow recovery time (about 30 minutes)
5. Suburban SW10DE: High Capacity
For larger RVs or families, the Suburban SW10DE offers the highest capacity in our comparison. Based on manufacturer data, it holds 10 gallons and can heat water with either propane or electricity. Owner feedback highlights the convenience of the auto-changeover feature and the ease of anode rod maintenance. The tank is porcelain enamel lined for corrosion resistance.
However, the weight of 42 pounds may be a concern for weight-sensitive setups, and the cost is higher than smaller models. Additionally, the recovery time is still limited by the 12,000 BTU burner, so continuous high-demand use may require careful planning. We recommend this for large RVs with dedicated space and budget.
- Large 10-gallon tank for extended hot water supply
- Dual power with auto-changeover from electric to gas
- Side access panel for easy anode rod replacement
Pros: Ample hot water for families; Durable porcelain enamel tank
Cons: Heavy at 42 pounds; Higher upfront investment
6. Camp Chef Triton 2-Burner Stove: Portable Option
The Camp Chef Triton is a portable propane water heater that can serve as a backup or for outdoor showers. In our research, we found it offers decent flow for its size and is easy to set up. Owner reviews appreciate the included shower head and the ability to use it at campsites without RV hookups. It’s a good solution for boondockers who want hot water outside.
However, this unit is not intended for permanent installation inside an RV. The build quality is less robust than dedicated RV models, and the plastic components may not hold up to continuous use. We recommend it only as a supplementary or portable option for those who don’t want to modify their RV.
- Compact and portable for outdoor use
- Battery-powered ignition, no AC required
- Includes shower head and hose
Pros: Versatile for camping, not just RVs; No installation needed
Cons: Not designed for permanent RV installation; Lower durability than built-in models
7. EccoTemp i12-LP Portable Tankless: Outdoor Shower
The EccoTemp i12-LP is another portable option designed for outdoor use. Based on the specifications, it produces up to 1.5 GPM and includes a handy low water pressure indicator. Owner feedback notes it works well for rinsing dishes or quick outdoor showers. The battery ignition is convenient for off-grid use.
However, we found that performance suffers in wind, and the unit is not certified for indoor installation. The durability is lower than built-in models, with some owners reporting plastic fittings cracking after a season. This is best for occasional outdoor use, not as a primary RV water heater. RVers needing a permanent solution should skip this.
- Outdoor-rated with built-in hanging bracket
- Includes shower head and hose with on/off switch
- Battery ignition and low water pressure indicator
Pros: Easy to move and store; Good for outdoor showers at campsites
Cons: Not for indoor use; Inconsistent temperature in windy conditions
Frequently Asked Questions
What size RV hot water heater do I need?
The size depends on your hot water usage. For most RVs, a 6-gallon tank provides enough for 1-2 quick showers. Families or those who want longer showers should consider a 10-gallon tank or a tankless model. Tankless heaters offer unlimited hot water but require higher propane flow and stable water pressure.
Can I install an RV hot water heater myself?
Many RV owners can replace a similar model themselves if they have basic plumbing and electrical skills. However, gas connections and venting must comply with safety standards. We recommend consulting the manufacturer’s manual and, if unsure, hiring a certified RV technician to avoid safety hazards.
How long does an RV hot water heater last?
With proper maintenance, a typical RV water heater lasts 5-10 years. Tank life depends on anode rod condition and water quality. Replacing the anode rod annually can extend the tank’s life. Tankless models may last longer as they lack a tank that can corrode.
What is the difference between gas and electric RV water heaters?
Gas (propane) heaters heat water faster and work off-grid, but consume propane. Electric heaters are quieter and use campground power, but recover slower. Many dual-fuel models let you switch between the two. Tankless heaters are typically gas-powered and provide continuous hot water.
Do I need a tankless RV water heater?
Tankless heaters are ideal if you want endless hot water and have space constraints. However, they cost more, require higher propane flow, and can have temperature fluctuations. They are best for full-time RVers or those who take long showers. For occasional use, a tank model is more cost-effective.
Our Verdict
After comparing specifications, safety certifications, and owner feedback, our top pick is the Suburban 520891 Nautilus SW6DE for its proven reliability, dual fuel flexibility, and widespread support. The runner-up is the Girard 2GWHAM tankless for those who prioritize endless hot water and space savings. Choose based on your hot water demand, fuel preference, and installation constraints.
