The best propane water heater provides reliable, on-demand hot water for households relying on propane fuel. It’s ideal for homes off the natural gas grid or those seeking a robust backup system. Choosing the right unit ensures consistent comfort and avoids the frustration of lukewarm showers or lengthy wait times for water to heat up.
Performance, energy efficiency, and tank capacity vary significantly, and selecting a unit that doesn’t match your household’s needs can lead to wasted energy and inadequate hot water supply. Explore our curated selection of the top 10 best propane water heater options to pinpoint the perfect fit for your home’s demands and enjoy uninterrupted hot water.
The best propane water heater offers on-demand heating with sufficient GPM for household needs, such as the APUS Tankless Water Heater Propane, up to 4.42 GPM, or the Rheem RTG-70XLP-3 High Efficiency Non-Condensing Outdoor Tankless Liquid Propane Water heater capable of 7.0 GPM. Key considerations include GPM flow rate, BTU output for heating capacity, and whether it’s an indoor or outdoor unit depending on installation requirements.
Best Propane Water Heater: Top Picks at a Glance
| Image | Product | Buy |
|---|---|---|
Best Pick 1  | CAMPLUX 5L Portable Tankless Water Heater, 1.32 GPM Outdoor Propane Best for: Campers and adventurers | Check Price |
Best Pick 2  | APUS Tankless Water Heater Propane Gas, Up to 4.42 GPM, Best for: High-demand households | Check Price |
Best Pick 3  | Ranein Propane Gas Tankless Water Heater, Indoor Max 4.3 GPM, Best for: Indoor installations | Check Price |
Best Pick 4  | CAMPLUX 2.64 GPM Propane Portable Gas WaterHeater, 68,000 BTU Outdoor Best for: Outdoor events | Check Price |
Best Pick 5  | Rheem RTG-70XLP-3 High Efficiency Non-Condensing Outdoor Tankless Liquid Propane Water Best for: Outdoor installations | Check Price |
How We Picked
To determine the best propane water heater, we prioritized real-world performance, safety, and durability. We evaluated flow rates like the 4.42 GPM from APUS and the 7.0 GPM from Rheem, alongside BTU output for consistent heating. Build quality was assessed by looking for features like CSA safety standards and robust heat exchangers, evident in models like CAMPLUX and Ranein.
Standout features such as thermostatic control, low-flow start technology, and portability for outdoor use were also crucial in our selection process. We ruled out units lacking essential safety protections.
What Most Buyers Get Wrong
GPM: Your Hot Water Flow Demand
When selecting a propane water heater, GPM (gallons per minute) is crucial. It dictates how much hot water is available simultaneously. For RVs or cottages with single-use, a 2.64 GPM like the CAMPLUX 2.64 GPM or Ranein Gen II models might suffice.
However, larger homes with multiple fixtures running at once, such as the Rheem RTG-70XLP-3 or APUS models with 4.42 GPM or higher, are better equipped to handle the demand without sudden temperature drops.
Tankless vs. Tank: Understanding Propane Efficiency
Propane water heaters come in tankless and traditional tank models. Tankless units, like all those listed here, heat water on demand, offering continuous hot water and potentially saving energy by not keeping a large volume of water hot 24/This is ideal for situations where hot water usage is intermittent or high, such as in larger families or when multiple showers are in use.
Tankless models also offer space-saving benefits over traditional tanks.
1. CAMPLUX 5L Portable Tankless Water Heater, 1.32 GPM Outdoor Propane
Best for: lightweight camping trips.
Weighing only 10 lbs with a folding handle, the CAMPLUX 5L Portable Tankless Water Heater offers ease of transport for your outdoor excursions. This compact unit ensures you can enjoy a warm, clean shower after a day of camping, fishing, or RV travel, fitting conveniently into your vehicle.
It delivers 1.32 GPM of hot water instantly, thanks to its 10 KW output and a maximum temperature of 114°F. Essential safety features include anti-freezing protection, dry combustion protection, and flame failure protection, operating on 3 Volts with a maximum pressure of 110 PSI.
Pros
- 1.32 GPM flow rate for instant hot water
- Lightweight at 10 lbs for portability
- Anti-freezing protection for cold climates
- Compact design for easy storage
Cons
- Low maximum temperature of 114°F
This unit is ideal for individuals or couples on camping trips or RV adventures needing a portable, on-demand hot water solution. Enjoy the convenience of a warm shower wherever your travels take you.
2. APUS Tankless Water Heater Propane Gas, Up to 4.42 GPM,
Best for: larger homes with multiple simultaneous users.
The APUS Tankless Water Heater provides a powerful 95,000 BTU heating capacity, enabling a high flow rate of 4.42 GPM. This performance means it can meet the simultaneous hot water demands of two showers plus a sink, maintaining stable temperatures even during peak usage in larger households.
Featuring innovative 0.66 GPM low-flow start technology, it heats consecutively for multiple applications. The unit operates at 120 Volts and reaches a maximum temperature of 140°F, supported by high-precision sensors and smart CPU technology for consistent output.
Pros
- 4.42 GPM high flow rate
- 95,000 BTU heating capacity
- Simultaneous use for 2 showers and 1 sink
- 0.66 GPM low-flow start technology
Cons
- Requires 120 Volts for operation
This model is best suited for families or larger homes that frequently experience multiple simultaneous hot water demands. Its high capacity ensures everyone gets hot water when needed.
3. Ranein Propane Gas Tankless Water Heater, Indoor Max 4.3 GPM,
Best for: multi-zone home heating.
The Ranein Propane Gas Tankless Water Heater delivers 4.3 GPM with a 100,000 BTU output, supporting up to 3-4 simultaneous water points. Its intelligent linkage of gas, water, and temperature ensures endless hot water on demand without any waiting, ideal for busy households.
It features four intelligent preset modes: 4-season auto-matching, Kitchen default at 100°F, and Bathtub with volume adjustment from 50-800L. Operating on 120 Volts, it reaches a maximum temperature of 155°F with a maximum pressure of 116 PSI.
Pros
- 4.3 GPM flow rate for multiple points
- 100,000 BTU heating capacity
- Four intelligent preset modes tailored to use
- Precise temperature control linking gas, water, and temp
Cons
- Requires 120 Volts for operation
This water heater is perfect for homes with multiple bathrooms or active kitchens needing to supply hot water to several fixtures at once. The preset modes offer convenient customization for different needs.
4. CAMPLUX 2.64 GPM Propane Portable Gas WaterHeater, 68,000 BTU Outdoor
Best for: outdoor use with safety features.
The CAMPLUX 2.64 GPM Propane Portable Gas Water Heater is CSA safety standard approved, incorporating a flame failure device, anti-freezing protection, and overheat protection for family safety. Automatically decreasing water pressure between 3.6-110 PSI, it ensures safe operation in varied conditions.
This unit offers a flow rate of 2.64 GPM and outputs 68,000 BTUs, reaching a maximum temperature of 167°F. The anti-freezing drain plug allows for residual water discharge to prevent freezing, and it operates on 3 Volts, suitable for outdoor installations.
Pros
- CSA safety certification for peace of mind
- 2.64 GPM flow rate
- Anti-freezing drain plug
- Overheat protection up to 176°F
Cons
- Requires 3 Volts (battery) for operation
This heater is an excellent choice for outdoor use, such as cabins, patios, or RVs, where safety and weather protection are paramount. Its features ensure reliable performance even in colder environments.
5. Rheem RTG-70XLP-3 High Efficiency Non-Condensing Outdoor Tankless Liquid Propane Water
Best for: high-demand homes with multiple bathrooms.
The Rheem RTG-70XLP-3 High Efficiency Non-Condensing Outdoor Tankless Liquid Propane Water Heater delivers a potent 7.0 GPM, making it ideal for homes with 2–3 bathrooms and multiple simultaneous hot water needs. Its 180,000 BTUs ensure fast, reliable hot water even during peak household demand.
This durable, outdoor-designed unit operates with a high efficiency rating and features hot-start programming to minimize temperature fluctuations. It uses 120 Volts and has a maximum temperature output of 140°F, designed for easy wall mounting by a qualified installer.
Pros
- 7.0 GPM flow rate for high demand
- 180,000 BTU output for fast heating
- Hot-start programming for consistent temps
- Designed for outdoor installation
Cons
- Requires 120 Volts for operation
This Rheem model is perfect for large households or homes with demanding hot water needs, such as multiple showers running concurrently. Its outdoor installation design saves indoor space.
6. Gen II Ranein RV Tankless Water Heater 65,000 BTU, On-Demand
Best for: RV use with improved flow.
The Gen II Ranein RV Tankless Water Heater, powered by a 65,000 BTU high-output burner, heats water faster than lower-BTU RV heaters. It delivers a strong 3.9 GPM flow and stable temperatures, even in cold weather, ensuring longer, uninterrupted showers with fewer temperature swings.
This unit provides precise control between 95°F–124°F and uses staged combustion for efficiency. Operating on 12 Volts DC, it has a maximum pressure of 150 PSI and is designed as a built-in unit for RV installations.
Pros
- 3.9 GPM flow rate for stronger pressure
- 65,000 BTU high-output burner
- Stable temperatures within 95°F–124°F
- 12 Volts DC operation for RVs
Cons
- Maximum temperature of 124°F might be too low for some users.
This Ranein heater is ideal for RV owners who want an upgrade from standard RV water heaters, providing better flow and more consistent temperatures. Its efficiency is beneficial for long journeys.
7. Gen II Ranein On-Demand Propane RV Tankless Water Heater, 15×15
Best for: budget-conscious RV replacement.
The Gen II Ranein On-Demand Propane RV Tankless Water Heater features an advanced deep fire row design for maximum heating efficiency, delivering consistent hot water even in cold winter conditions. It offers temperatures adjustable from 95°F to 124°F with staged combustion for summer savings.
With a flow rate of 2.9 cubic centimeters per minute, this unit delivers 42,000 BTUs and operates efficiently. It’s designed as a straightforward replacement for most standard RV water heaters, including specific Suburban and Atwood models, simplifying installation.
Pros
- Consistent hot water in cold conditions
- Easy direct replacement for common RV models
- Adjustable temperature from 95°F to 124°F
- Staged combustion for efficiency
Cons
- Flow rate of 2.9 CC/min is not standard GPM and may be lower than desired.
This Ranein model is a good option for RV owners looking to replace an older water heater with an on-demand propane unit that offers efficiency and ease of installation. It’s suited for moderate climates.
8. Rheem RTG-70DVLP-3 High Efficiency Non-Condensing Indoor Tankless Liquid Propane Water
Best for: indoor installation for larger homes.
The Rheem RTG-70DVLP-3 High Efficiency Non-Condensing Indoor Tankless Liquid Propane Water Heater provides a substantial 7.0 GPM flow rate, perfect for 2–3 bathroom homes that require hot water for multiple fixtures simultaneously. Its 160,000 BTUs ensure rapid and dependable hot water delivery during high-use periods.
This unit offers high efficiency and is designed for indoor installation with a durable, compact metal cabinet that facilitates easy wall mounting by a qualified installer. It operates on 120 Volts, reaching a maximum of 140°F, and provides consistent hot water for demanding households.
Pros
- 7.0 GPM flow rate for high-demand households
- 160,000 BTUs for quick heating
- Indoor installation design saves outdoor space
- Compact metal cabinet for durability
Cons
- Requires 120 Volts and professional installation.
This Rheem model is ideal for larger homes or multiple bathrooms needing a robust indoor propane water heater. Its high flow rate ensures comfort even during peak demand.
9. APUS Tankless Water Heater Propane, 140,000 BTU Indoor Installation Up
Best for: smart home integration and instant hot water.
The APUS Tankless Water Heater Propane boasts a powerful 140,000 BTU burner and an oxygen-free copper heat exchanger for consistent performance and instant hot water in just 1 second. Its exclusive Zero-Cold-Water Technology eliminates cold water wait times, ensuring immediate comfort.
This smart unit features WiFi remote control via the Tuya APP, allowing for integrated smart home functionality. It provides a flow rate of 6.8 GPM, reaching a maximum temperature of 140°F, and includes Smart Seasonal Technology for optimized heating.
Pros
- 140,000 BTU for high heating power
- 6.8 GPM flow rate
- WiFi Remote Control with Tuya APP
- Zero-Cold-Water Technology for instant use
Cons
- Requires 120 Volts for operation and an active WiFi connection for smart features.
This APUS water heater is perfect for tech-savvy homeowners seeking instant hot water with smart home integration capabilities. Its high BTU and flow rate make it suitable for demanding households.
10. CAMPLUX F10 Ultra, First 2.64 GPM Thermostatic Propane Water Heater,
Best for: consistent temperature showers anywhere.
The CAMPLUX F10 Ultra is the world’s first thermostatic propane water heater, locking in your ideal temperature with ±1°F precision control for consistently comfortable showers, even with back-to-back use. This 2.64 GPM unit delivers double the hot water output of compact models.
As the smallest 2.64 GPM water heater, it weighs 17.6 lb and includes a built-in folding handle for portability. It outputs 68,000 BTUs and reaches a maximum temperature of 159°F, incorporating dry combustion protection and flame failure protection.
Pros
- ±1°F precise thermostatic temperature control
- 2.64 GPM flow rate with consistent output
- Smallest model for its flow rate
- Portable design with folding handle
Cons
- Maximum temperature of 159°F might be insufficient for some specific industrial needs.
This CAMPLUX heater is ideal for campers, RV users, or anyone who prioritizes perfectly consistent shower temperatures on the go. Its thermostatic control offers a home-like comfort experience outdoors.
Flow Rate vs. BTU: The Real Bottleneck
When choosing the best propane water heater, the critical decision hinges on matching flow rate to your anticipated demand, a fact often overshadowed by a fascination with sheer BTU power. While high BTU figures like the 160,000 BTUs found in models such as the Rheem RTG-70XLP-3 and Rheem RTG-70DVLP-3 certainly indicate robust heating capability, this power is rendered ineffective if the unit cannot deliver enough hot water simultaneously. Your most common constraint isn’t the heat generated, but the volume of water it can heat and deliver at any given moment.
For instance, a unit like the CAMPLUX 5L Portable Tankless Water Heater, with its 1.32 GPM flow rate, is clearly intended for single, low-demand applications, like an outdoor shower or a small RV sink, irrespective of what its BTU rating might suggest for single-point heating.
Contrast this with units designed for higher simultaneous usage. The APUS Tankless Water Heater Propane, rated up to 4.42 GPM, and the Ranein Propane Gas Tankless Water Heater, offering 4.3 GPM, are positioned to handle multiple fixtures. However, even within this higher-capacity tier, the Rheem RTG-70XLP-3 and Rheem RTG-70DVLP-3, boasting a substantial 7.0 GPM, clearly lead the pack for homes needing to run showers, dishwashers, and laundry without interruption.
The mistake most buyers make is looking at the BTU and assuming it automatically translates to sufficient hot water for their entire household. A 100,000 BTU unit might heat water quickly for one faucet, but if you’re trying to run two showers, the pressure and temperature will drop dramatically, making the high BTU almost irrelevant to the actual user experience.
Consider the Gen II Ranein RV Tankless Water Heater 65,000 BTU and its sibling, the Gen II Ranein On-Demand Propane RV Tankless Water Heater. While both are marketed for RVs and feature on-demand heating, their differing flow rates—implied by their BTU output and typical RV fixture needs—will dictate their suitability. A higher GPM unit will offer more comfortable showering, especially if multiple people are using hot water consecutively.
Similarly, the CAMPLUX F10 Ultra, a 2.64 GPM thermostatic model, prioritizes precise temperature control over raw volume, making it ideal for applications where consistent temperature is paramount, such as a sensitive dishwashing station or a specific comfort requirement, over bulk hot water delivery.
Ultimately, the difference between a satisfactory and a frustrating propane water heater experience lies in correctly identifying your peak simultaneous hot water consumption. If a single faucet or shower is your typical use, a lower GPM unit like the CAMPLUX 2.64 GPM Propane Portable Gas WaterHeater might suffice. However, for a family home, prioritizing a model such as the Rheem RTG-70DVLP-3 with its 7.0 GPM is essential to avoid disappointment, as its higher flow rate is the true indicator of its capacity to meet actual household demands, regardless of BTU alone.
What to Look For in a Best Propane Water Heater
Tank size and recovery rate
Your household’s hot water demand dictates tank size and recovery rate. For one or two people, a 30-gallon tank with a recovery rate around 30 GPH is sufficient. Families of four or more require at least a 50-gallon tank and a recovery rate exceeding 50 GPH to prevent running out of hot water during peak usage.
Look for manufacturers that clearly specify the number of occupants a tank size is suited for, and prioritize units with higher GPH ratings within your needed capacity to ensure consistent hot water delivery, even with multiple simultaneous demands. For most families, a 50-gallon tank will be the optimal choice.
Energy efficiency and ignition type
Energy efficiency ratings, such as the Energy Factor (EF), directly impact your operating costs. An EF of 0.60 represents 60% efficiency. Aim for units with the highest EF rating offered within your budget, ideally above 0.70, for significant savings over time.
Electronic ignition systems are universally superior to standing pilot lights; they conserve energy by only igniting the burner when hot water is needed, unlike pilot lights which burn fuel continuously. Prioritize models with enhanced insulation and built-in low-flow restrictors to further reduce energy consumption.
Choose electronic ignition for cost-effectiveness and efficiency.
Ventilation options
Ventilation type is critical for safety and performance. Direct vent models draw combustion air from outside and vent exhaust through a side wall, ideal for homes where running an exhaust pipe through the roof is difficult or impossible. Power vent units use a fan to assist exhaust, offering more placement flexibility but requiring an electrical connection.
Atmospheric vent models rely on natural buoyancy and need a vertical chimney, making them best suited for homes with existing, properly-sized flues. For modern installations with no existing chimney, select a direct or power vent system.
Dimensions and installation location
Carefully measure your available space before selecting a unit; propane water heaters come in various dimensions. Standard 50-gallon models typically stand around 5 to 7 feet tall with a 20-25 inch diameter. Ensure adequate clearance for maintenance, often 6 inches around the unit and 12 inches above.
Consider if your location permits indoor or outdoor installation; outdoor-rated units are essential if placing them in garages or on exterior walls. For tight spaces, compact models or those designed for closet installation are available.
Verify the physical dimensions against your designated installation area to ensure a proper fit.
Which Should You Choose?
- If you need a portable, lightweight unit for camping or RVing, choose a compact, tankless model with a lower GPM and folding handle.
- If you have a medium-sized home with 2-3 bathrooms and simultaneous hot water needs, look for a high-efficiency tankless unit capable of 7.0 GPM and 160,000 BTUs.
- If you need to supply hot water to multiple fixtures at once, select a powerful tankless heater with a flow rate of 4.3 GPM or higher and 100,000 BTUs.
- If you prioritize precise temperature control and want to avoid fluctuations, opt for a thermostatic tankless model with advanced temperature locking features.
Quick Best Propane Water Heater Buying Checklist
- Capacity Needs: Determine the water usage of your household to select an appropriate tank size, typically between 6 to 50 gallons.
- Recovery Rate: Look for a high Gallons Per Hour (GPH) recovery rate to ensure hot water availability for multiple uses.
- Vent Type: Choose between direct, power, or atmospheric venting based on your installation location and safety needs.
- Energy Factor: Higher Energy Factor (EF) ratings indicate greater efficiency and potential cost savings over time.
- Ignition System: Electronic ignitions offer convenience and efficiency, while pilot lights are a simpler, more traditional option.
- Space & Clearance: Measure your intended installation area, checking manufacturer specifications for required clearances.
Frequently Asked Questions
Why Are Specific Recovery Rates Important For A Propane Water Heater?
Recovery rates are crucial for a propane water heater as they indicate how quickly the unit can reheat water after it’s been used. A higher GPH means faster replenishment, ensuring you have a consistent supply for showers and appliances. This is especially important for larger households or during peak usage times.
What Are The Main Vent Types For Propane Water Heaters And Their Differences?
Propane water heaters commonly use direct, power, or atmospheric venting. Direct vent pulls combustion air from outside and exhausts through the same vent, while power vent uses a fan for exhaust. Atmospheric vent relies on natural draft, requiring a dedicated chimney or vent pipe.
How Does Tank Size Impact The Performance Of A Propane Water Heater?
Tank size directly affects how much hot water is available at any given moment. Larger tanks store more hot water, ideal for high-demand households, but may have slower recovery. Smaller tanks are more efficient for lower usage but can run out of hot water faster.
What Role Does The Energy Factor (Ef) Play In Choosing A Propane Water Heater?
The Energy Factor (EF) rating quantifies a propane water heater’s overall energy efficiency. A higher EF score means the unit wastes less energy and will cost less to operate over time. It’s a key metric for comparing the efficiency of different models.
When Is An Electronic Ignition System Preferable Over A Pilot Light For A Propane Water Heater?
Electronic ignition systems are generally preferred for their efficiency and convenience, as they only activate the burner when hot water is needed, saving fuel. Pilot lights are always on, consuming a small amount of gas continuously, though they are often simpler and more robust.
Final Words
Selecting the best propane water heater ensures reliable and efficient hot water for your home. With options for various tank sizes, recovery rates, and venting solutions, you can find a unit that perfectly suits your needs. Invest wisely in a quality propane water heater to enjoy continuous comfort and convenience.