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10 Best Outdoor Propane Tankless Water Heater 2025 in the United States
#1
Winner
Rinnai V53DeP Propane Tankless Water Heater, 5.3 GPM, Outdoor Installation
The Rinnai V53DeP is a versatile outdoor propane tankless water heater designed to provide endless hot water with a maximum flow rate of 5.3 gallons per minute (GPM). This is suitable for households needing to run multiple appliances simultaneously, up to four. Its compact size (13"W x 30"H) and wall-mounting design make it space-efficient and ideal for outdoor installation.
Rating
10.0
Chosen by1,438
Flow Rate (GPM)
Temperature Range
Size and Portability
Most important from
2743 reviews
#2
Rinnai RE199eP Non-Condensing Propane Tankless Water Heater, Up to 9.8 GPM, Outdoor Installation, 199,000 BTU
The Rinnai RE199eP Non-Condensing Propane Tankless Water Heater is an efficient and powerful option for those needing an outdoor installation. With a flow rate of up to 7.6 GPM, it can handle multiple fixtures simultaneously, ensuring you never run out of hot water. This model is compact, comparable to the size of a small suitcase, making it portable and easy to install in various outdoor settings.
Rating
10.0
Energy Efficiency
Most important from
75 reviews
#3
CAMPLUX 2.64 GPM Propane Portable Gas Water Heater, 68,000 BTU Outdoor Tankless Camping Water Heater with Digital Display, White
The CAMPLUX 2.64 GPM Propane Portable Gas Water Heater is a versatile option for outdoor use, especially for camping. One of its key strengths is the flow rate of 2.64 gallons per minute which is sufficient for most outdoor shower needs. The 68,000 BTU rating indicates a good heating capacity, ensuring you get hot water quickly. The heater is energy efficient with an 11.5% energy saving technology, making it both eco-friendly and cost-effective over time.
Rating
10.0
Flow Rate (GPM)
Energy Efficiency
Temperature Range
Most important from
697 reviews
Top 10 Best Outdoor Propane Tankless Water Heater 2025 in the United States
#1
Winner
10.0 score
Rinnai V53DeP Propane Tankless Water Heater, 5.3 GPM, Outdoor Installation
Rinnai V53DeP Propane Tankless Water Heater, 5.3 GPM, Outdoor Installation
Flow Rate (GPM): 5.3
Energy Efficiency: High
Safety Features: Enhanced Scale Detection
Size and Portability: 13"W x 30"H, Wall-mounting
Chosen by 1438 this week
Rinnai RE199eP Non-Condensing Propane Tankless Water Heater, Up to 9.8 GPM, Outdoor Installation, 199,000 BTU
Rinnai RE199eP Non-Condensing Propane Tankless Water Heater, Up to 9.8 GPM, Outdoor Installation, 199,000 BTU
Flow Rate (GPM): 7.6
BTU Rating: 199000
Energy Efficiency: Meets South Coast Air Quality
Size and Portability: Compact, small suitcase size
CAMPLUX 2.64 GPM Propane Portable Gas Water Heater, 68,000 BTU Outdoor Tankless Camping Water Heater with Digital Display, White
CAMPLUX 2.64 GPM Propane Portable Gas Water Heater, 68,000 BTU Outdoor Tankless Camping Water Heater with Digital Display, White
Flow Rate (GPM): 2.64
BTU Rating: 68000
Energy Efficiency: 11.5% energy saving
Temperature Range: up to 167°F
Ignition Type: 2 D batteries
Safety Features: CSA certified, flame failure, overheat protection
Size and Portability: 23 lbs, compact, 13"W x 21.7"H
Propane Tankless Water Heater Outdoor - ORBEK 120,000 BTU Up to 5.1 GPM Outdoor Installation - CSA Certified On-Demand Instant hot Water Heater 3/4" NPT Connector Size
Propane Tankless Water Heater Outdoor - ORBEK 120,000 BTU Up to 5.1 GPM Outdoor Installation - CSA Certified On-Demand Instant hot Water Heater 3/4" NPT Connector Size
Flow Rate (GPM): 5.1
BTU Rating: 120,000
Energy Efficiency: High
Temperature Range: Up to 149°F
Safety Features: CSA certified, multiple protections
Size and Portability: 15.51"W x 23.94"H, 36.9 lbs
CAMPLUX 1.32 GPM Portable Water Heater, 5L Tankless Water Heater Propane Outdoor, AY132BN, Black
CAMPLUX 1.32 GPM Portable Water Heater, 5L Tankless Water Heater Propane Outdoor, AY132BN, Black
Flow Rate (GPM): 1.32
BTU Rating: 34000
Temperature Range: Up to 167°F
Ignition Type: Battery-powered
Safety Features: Anti-freezing, Over-heating, Low water flow
Size and Portability: Compact, Lightweight, 10 pounds
Related Products
Rinnai RE140eP Non-Condensing Propane Tankless Water Heater, Up to 5.3 GPM, Outdoor Installation, 140,000 BTU
Rinnai RE140eP Non-Condensing Propane Tankless Water Heater, Up to 5.3 GPM, Outdoor Installation, 140,000 BTU
Flow Rate (GPM): 5.3
BTU Rating: 140,000
Energy Efficiency: High Efficiency
Safety Features: variety of safety features
Size and Portability: 14.05"W x 24.64"H x 10.77"D
Rheem RTGH-95DVELP-3 Super High Efficiency Condensing Indoor Tankless Liquid Propane Water Heater, 9.5 GPM with WiFi
Rheem RTGH-95DVELP-3 Super High Efficiency Condensing Indoor Tankless Liquid Propane Water Heater, 9.5 GPM with WiFi
Flow Rate (GPM): 9.5 GPM
Safety Features: LeakGuard Detection and Prevention
Size and Portability: 17.7"W x 23.7"H
Rheem RRTGH95DVLP3701178 Rheem RTGH Series 9.5 GPM 199,900 BTU 120 Volt Residential Indoor Liquid Propane Tankless Water Heater Stainless Steel
Rheem RRTGH95DVLP3701178 Rheem RTGH Series 9.5 GPM 199,900 BTU 120 Volt Residential Indoor Liquid Propane Tankless Water Heater Stainless Steel
Flow Rate (GPM): 9.5
BTU Rating: 199,900
Energy Efficiency: 0.93
Temperature Range: 100 to 140°F
Ignition Type: Electric
Safety Features: Hot Start, Overheat Film Wrap
Size and Portability: 17.7"W x 23.7"H, 59.9 lbs
Rheem RTG-70XLP-3 High Efficiency Non-Condensing Outdoor Tankless Liquid Propane Water Heater, 7.0 GPM
Rheem RTG-70XLP-3 High Efficiency Non-Condensing Outdoor Tankless Liquid Propane Water Heater, 7.0 GPM
Flow Rate (GPM): 7.0
Energy Efficiency: high
Temperature Range: up to 140°F
Safety Features: Hot-start Programming
Size and Portability: 13.5"W x 20.75"H, 39.2 lbs
#10
8.8 score
Propane Gas Tankless Water Heater MIZUDO Up to 5.1 GPM, 120,000 BTU, Outdoor Installation Only, Instant Hot Water Heater, CSA Certified
Propane Gas Tankless Water Heater MIZUDO Up to 5.1 GPM, 120,000 BTU, Outdoor Installation Only, Instant Hot Water Heater, CSA Certified
Flow Rate (GPM): 5.1
BTU Rating: 120000
Energy Efficiency: Stable temp fluctuation within ±1℉
Safety Features: CSA certification
Size and Portability: 13"W x 24"H, 36.8 lbs
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Buying Guide for the Best Outdoor Propane Tankless Water Heater
Choosing the right outdoor propane tankless water heater can significantly enhance your outdoor living experience by providing a continuous supply of hot water for showers, washing dishes, or other outdoor activities. The key to selecting the best model for your needs is understanding the various specifications and how they impact performance and usability. Here are the key specs to consider and how to navigate them to find the perfect fit for you.Flow Rate (GPM)Flow rate, measured in gallons per minute (GPM), indicates how much hot water the heater can deliver at a time. This is crucial because it determines whether the heater can meet your hot water demands. Lower flow rates (2-4 GPM) are suitable for single applications like a shower or sink, while higher flow rates (5-10 GPM) can handle multiple simultaneous uses, such as a shower and a dishwasher running at the same time. To pick the right flow rate, consider the number of hot water outlets you plan to use simultaneously.
BTU RatingBTU (British Thermal Unit) rating measures the heater's heating capacity. A higher BTU rating means the heater can heat water more quickly and efficiently. For light use, such as a single shower, a lower BTU rating (30,000-100,000 BTUs) may suffice. For heavier use, such as multiple showers or a combination of shower and kitchen use, look for a higher BTU rating (100,000-200,000 BTUs). Choose a BTU rating based on your expected hot water usage and the climate, as colder climates may require higher BTUs to heat the water effectively.
Energy EfficiencyEnergy efficiency indicates how well the heater converts propane into hot water. Higher efficiency means lower propane consumption and cost savings. Efficiency is often expressed as a percentage, with higher percentages indicating better performance. Look for models with an efficiency rating of 80% or higher for optimal savings. If you are environmentally conscious or looking to reduce utility bills, prioritize models with higher efficiency ratings.
Temperature RangeThe temperature range specifies the minimum and maximum temperatures the heater can achieve. This is important for ensuring the water is hot enough for your needs. Most heaters offer a range between 80°F to 140°F. If you need very hot water for specific tasks, ensure the heater can reach those temperatures. Consider your typical usage scenarios and choose a model that can comfortably meet those temperature requirements.
Ignition TypeIgnition type refers to how the heater starts heating the water. Common types include manual, electric, and battery-powered ignition. Manual ignition requires you to light the heater yourself, which can be less convenient. Electric ignition is more user-friendly but requires a power source. Battery-powered ignition offers convenience without needing an external power source. Choose the ignition type based on your preference for convenience and the availability of power sources in your outdoor setting.
Safety FeaturesSafety features are critical for ensuring safe operation. Look for features like flame failure protection, overheating protection, and anti-freeze protection. Flame failure protection shuts off the gas if the flame goes out, preventing gas leaks. Overheating protection prevents the water from getting too hot, which can be dangerous. Anti-freeze protection is essential if you plan to use the heater in cold climates. Prioritize models with comprehensive safety features to ensure safe and reliable operation.
Size and PortabilityThe size and portability of the heater determine how easy it is to install and move. Smaller, lightweight models are easier to transport and install, making them ideal for camping or temporary setups. Larger models may offer higher performance but can be more challenging to move and install. Consider where and how you plan to use the heater and choose a size that balances performance with ease of installation and portability.