5 Best Propane Tankless Water Heater for High Altitude [In 2025]

When it comes to finding the perfect propane tankless water heater for high-altitude living, it’s essential to consider factors like heating capacity, temperature control, energy efficiency, and safety features. In this comprehensive product review, we’ll explore the top options on the market to help you make an informed decision for your home or RV. Get ready to enjoy endless hot water and improved energy savings with these top-rated propane tankless water heaters.

5 Best Propane Tankless Water Heater for High Altitude Reviews

Propane Gas Tankless Water Heater – ORBEK 80,000 BTU Up to 3.6 GPM Indoor Installation – CSA Certified On-Demand Instant Hot Water Heater 3/4″ NPT Connector Size

Overview

The Orbek propane tankless water heater delivers up to 3.6 GPM of hot water and 80,000 BTU, making it a powerful and efficient choice for homes with 1-3 fixtures running simultaneously. This CSA-certified indoor unit features advanced safety and temperature control technologies to provide a reliable and comfortable hot water experience.

Specs

• Heating Capacity: 80,000 BTU
• Flow Rate: Up to 3.6 GPM
• Dimensions: 20.5″H x 13.0″L x 7.0″W
• Connector Size: 3/4″ NPT
• Safety Features: Dry combustion protection, overheat protection, water leakage protection, flame failure protection, high water pressure protection

Pros

• Delivers ample hot water for simultaneous use
• Compact, space-saving design
• Precise temperature control within 1°F
• Highly energy-efficient with adjustable heating modes
• CSA-certified for safety and reliability

Cons

• Vents and water valve kit not included
• Professional installation recommended for optimal performance

Customer Reviews

Customers have praised the Orbek propane tankless water heater for its reliable performance, energy efficiency, and easy installation. Many users report consistent hot water delivery, even during peak usage, and appreciate the compact footprint that allows for convenient placement in their homes.

APUS Tankless Water Heater Propane Gas, Up to 4.42 GPM, Indoor Hot Water Heater, 95,000 BTU on Demand Instant Hot Water Heaters with Smart Digital Display, Space Gray

Overview

The APUS propane tankless water heater is a high-performance option that delivers up to 4.42 GPM of hot water at 95,000 BTU. Featuring smart temperature control, energy-efficient design, and a sleek compact body, this unit is well-suited for homes with simultaneous hot water demands.

Specs

• Heating Capacity: 95,000 BTU
• Flow Rate: Up to 4.42 GPM
• Dimensions: 20.55″H x 13.27″W x 5.91″D
• Temperature Control: ±1°F of desired setting (95°F-140°F)
• Efficiency: 85%+ thermal efficiency

Pros

• High flow rate for simultaneous use
• Precise and stable temperature control
• Highly efficient with energy-saving features
• Compact and space-saving design
• Multiple safety protections for peace of mind

Cons

• More expensive than some other options
• Requires professional installation for optimal performance

Customer Reviews

Customers have reported excellent performance from the APUS propane tankless water heater, particularly praising its ability to maintain consistent water temperatures even during peak usage. Many users appreciate the energy-efficient design and compact footprint, which makes it a great fit for small spaces and high-altitude homes.

Tankless Water Heater Propane, MIZUDO Indoor Installation Max 5.1 GPM 120,000 BTU On Demand Hot Water Heater, CSA Certified Constant Temp High Power for 2-3 Fixtures Big Family or Business, Gen 2

Overview

The Mizudo Gen 2 propane tankless water heater is a powerful and high-capacity option, delivering up to 5.1 GPM of hot water at 120,000 BTU. With advanced temperature control and safety features, this unit is designed to meet the hot water demands of larger households or small businesses.

Specs

• Heating Capacity: 120,000 BTU
• Flow Rate: Up to 5.1 GPM
• Dimensions: 22.76″H x 14.57″W x 7.0″D
• Temperature Control: ±1°F of desired setting (95°F-140°F)
• Safety Features: Windproof, waterproof, leakage protection, overheat protection, anti-freeze, dry-combustion protection

Pros

• Powerful heating capacity for large homes or businesses
• Precise temperature control within 1°F
• Comprehensive safety features for peace of mind
• CSA-certified for compliance with US safety standards
• Excellent energy efficiency with UEF > 0.81

Cons

• Larger physical size compared to some other models
• Professional installation recommended for optimal performance

Customer Reviews

Customers have been highly satisfied with the Mizudo Gen 2 propane tankless water heater, particularly praising its ability to provide consistent, high-temperature hot water even during peak usage. Many users appreciate the advanced safety features and energy-efficient design, which helps them save on their utility bills.

RV water heater,11Gen 65000 BTU Tankless Water Heater, with 15 x 15 inches Door,12v DC, High Altitude Available RV Instant Propane Hot Water Heater with showerhead (White)

Overview

The Countrymod RV propane tankless water heater is a versatile and high-performance option designed for use in recreational vehicles. With a 65,000 BTU heating capacity, instant hot water delivery, and features tailored for RV use, this unit is a great choice for adventurous travelers.

Specs

• Heating Capacity: 65,000 BTU
• Flow Rate: Unspecified
• Dimensions: 15″ x 15″ door size
• Power Source: 12V DC
• High Altitude Capability: Reliable operation up to 9,800 feet

Pros

• Dual internal and external water outlets for versatility
• Instant hot water delivery for on-the-go convenience
• Safety features like automatic shut-off and flame control
• High-altitude capability for use in mountainous regions
• Includes showerhead, pressure relief valve, and wall-mounted controller

Cons

• Lower heating capacity compared to some residential models
• May require modifications for certain RV layouts

Customer Reviews

While there are limited customer reviews available for this specific RV propane tankless water heater, the Countrymod brand is known for producing high-quality and reliable products for the RV market. Customers who have used this model report satisfactory hot water performance and appreciate the safety features and high-altitude capabilities.

65,000 BTU RV Tankless Water Heater without Door, KINGRVER, Propane Gas, DC 12V, 3 Optional Door Sizes 15″x15″, 15″x18″ and 18″x18″ for Refitment, Compatible with All RVs, High Altitude

Overview

The KINGRVER propane tankless water heater is a versatile option designed for use in recreational vehicles. With a powerful 65,000 BTU heating capacity, low-pressure activation, and high-altitude compatibility, this unit is a reliable choice for RV owners seeking instant and consistent hot water.

Specs

• Heating Capacity: 65,000 BTU
• Flow Rate: Unspecified
• Dimensions: 12.7″ x 12.7″ unit size, 3 optional door sizes available
• Power Source: 12V DC
• High Altitude Capability: Reliable operation up to 9,800 feet

Pros

• Powerful 65,000 BTU heating for ample hot water
• Industry-leading 0.5 GPM low-pressure activation
• High-altitude compatibility for use in mountainous regions
• Automatic freeze protection for cold-weather performance
• CSA-certified for safety and quality assurance

Cons

• Door kit sold separately, not included with the unit
• Flow rate not explicitly stated, may not be suitable for high-demand applications

Customer Reviews

While there are limited customer reviews available for this specific KINGRVER propane tankless water heater, the brand is known for producing high-quality RV accessories that are designed to withstand the demands of outdoor living. The unit’s high-altitude capabilities and focus on safety and efficiency suggest it could be a reliable choice for RV owners.

Buying Guide: Choosing the Best Propane Tankless Water Heater for High Altitude

Heating Capacity and Flow Rate

• Consider the BTU heating capacity and flow rate (GPM) to ensure the water heater can meet your hot water demands, especially if you have a larger home or plan to run multiple fixtures simultaneously.
• Higher BTU ratings and flow rates are generally better for high-altitude areas, as the reduced air pressure can affect the heater’s performance.

Temperature Control and Efficiency

• Look for tankless water heaters with precise temperature control, ideally within 1°F of your desired setting, to ensure a consistent and comfortable hot water experience.
• Energy-efficient features like adjustable heating modes and high thermal efficiency can help you save on your utility bills, especially in high-altitude areas where energy costs may be higher.

Safety and Durability

• Prioritize models with comprehensive safety features, such as overheat protection, leak detection, and anti-freeze capabilities, to ensure reliable and worry-free operation.
• Choose a tankless water heater that is CSA or UL-certified to meet the required safety standards for high-altitude installations.

Size and Installation

• Consider the physical dimensions of the tankless water heater and ensure it will fit in your desired installation location, whether it’s in your home or RV.
• Check the compatibility with your existing plumbing and venting systems, and be prepared to have the unit professionally installed for optimal performance and safety.

Additional Features

• Look for tankless water heaters with high-altitude capabilities, as this will ensure reliable operation in mountainous regions.
• For RV owners, features like dual water outlets, 12V DC power, and compact designs tailored for mobile use may be particularly important.

FAQ

1. What is the recommended BTU for a tankless water heater in a high-altitude area?

For high-altitude areas, it’s generally recommended to choose a tankless water heater with a higher BTU rating, typically in the range of 80,000 to 120,000 BTU. This helps ensure the heater can maintain sufficient hot water output despite the reduced air pressure at higher elevations.

2. How do I know if a tankless water heater is suitable for high-altitude use?

Look for tankless water heaters that are explicitly designed and tested for high-altitude operation, typically up to 9,800 feet or more. These units will feature specialized components and controls to compensate for the reduced air pressure and ensure reliable performance.

3. What are the benefits of a propane tankless water heater over a traditional tank-style heater?

Propane tankless water heaters offer several advantages, including endless hot water on demand, improved energy efficiency, compact size, and reduced risk of water damage from tank leaks. They are also well-suited for high-altitude locations where traditional tank heaters may struggle to maintain consistent temperatures.

4. Do I need to hire a professional to install a propane tankless water heater?

While it is possible for experienced DIYers to install a propane tankless water heater, it is generally recommended to have a licensed professional handle the installation. This ensures the unit is properly integrated with your home’s plumbing and venting systems, and that all safety protocols are followed, especially in high-altitude environments.

5. How do I maintain a propane tankless water heater in a high-altitude area?

Regular maintenance, such as cleaning the heat exchanger and checking for any signs of wear or damage, is essential for ensuring the long-term reliability of a propane tankless water heater in a high-altitude setting. It’s also important to follow the manufacturer’s recommendations for annual servicing by a qualified technician.

Conclusion

When it comes to finding the best propane tankless water heater for high-altitude living, the key is to prioritize features like heating capacity, temperature control, energy efficiency, and safety. The top-rated options we’ve