What is The Best Tankless Water Heater for Outdoor Shower [In 2025]

When it comes to outdoor showers, having a reliable and efficient tankless water heater is crucial for ensuring a comfortable and enjoyable experience. Tankless water heaters provide endless hot water on-demand, making them an ideal choice for outdoor applications where traditional tank-style heaters may not be practical. In this comprehensive review, we’ll take a closer look at some of the best tankless water heater options available on the market to help you make an informed decision for your outdoor shower needs.

Natural Gas Tankless Water Heater – ORBEK 120,000 BTU Up to 5.1 GPM Outdoor Installation – CSA Certified On-Demand Instant hot Water Heater 3/4″ NPT Connector Size

Overview

The ORBEK 120,000 BTU Outdoor Tankless Water Heater is a powerful and reliable option for providing endless hot water for your outdoor shower. Designed for outdoor use, it can withstand extreme weather conditions and features a range of advanced safety features to ensure safe and reliable operation.

Specs

• Provides up to 5.1 GPM of hot water
• Delivers 120,000 BTU of power
• CSA certified for outdoor use
• Operates effectively in low temperatures
• Compact dimensions of 15.5″L x 7.3″W x 24.0″H

Pros

• Durable and weatherproof design
• Powerful performance for multiple fixtures
• Stable temperature control within 1°F
• Remote control and LED digital display
• Compatible with most homes with 3/4″ NPT connections

Cons

• Requires professional installation for best performance and safety
• May be more expensive than some portable options

Customer Reviews

The ORBEK Outdoor Tankless Water Heater has received mostly positive reviews from customers, with many praising its reliable performance, easy installation, and excellent safety features. Some users have noted occasional issues with temperature stability or water pressure, but overall, it seems to be a well-received and high-quality product.

GASLAND Outdoors Propane Tankless Water Heater,1.58GPM 6L Portable Gas Water Heater, Overheating Protection, Easy to Install, Use for RV Cabin Barn Camping Boat, Blue, BE158L

Overview

The GASLAND Outdoors Propane Tankless Water Heater is a compact and portable option that is well-suited for outdoor activities, RVs, and off-grid applications. With a maximum power output of 41,000 BTU and a flow rate of 1.58 GPM, it provides reliable hot water for a variety of uses.

Specs

• Maximum power output of 41,000 BTU
• Flow rate of 1.58 GPM
• Operates on a standard 20 lb. propane tank
• Requires only 3.6 PSI of water pressure to start
• Compact and portable design

Pros

• Ideal for off-grid and portable use
• Equipped with advanced safety features
• LED digital display for temperature monitoring
• Includes a 1-year warranty and lifetime customer support
• Comes with all necessary accessories for easy installation

Cons

• Lower flow rate compared to some other options
• May not be suitable for high-demand applications
• Requires proper maintenance and storage for optimal performance

Customer Reviews

The GASLAND Outdoors Propane Tankless Water Heater has received generally positive reviews from customers, with many praising its portability, ease of use, and reliable performance. Some users have reported minor issues with temperature fluctuations or water pressure, but overall, it seems to be a well-received and versatile option for outdoor and off-grid use.

CAMPLUX Outdoor Tankless Water Heater Propane, 4.22 GPM Propane Tankless Water Heater, 16L Outdoor Water Heater for Camping, Remote Cabins, Tiny House & Mobile Home, 110,000 BTU, BW422

Overview

The CAMPLUX Outdoor Tankless Water Heater is a powerful and efficient option that delivers up to 4.22 gallons per minute of instant hot water. Designed for outdoor use, it features a range of safety features and user-friendly controls to provide a comfortable and reliable water heating experience.

Specs

• Maximum power output of 110,000 BTU
• Flow rate of 4.22 GPM
• Operates with water pressure between 4.0-110 PSI
• User-friendly LED display and controls
• Compact and easy-to-install design

Pros

• Powerful and efficient performance
• Equipped with multiple safety features
• User-friendly interface for easy operation
• Suitable for a variety of outdoor applications
• Provides dedicated technical support and assistance

Cons

• May require some additional maintenance and care
• Installation may be more complex than some other options

Customer Reviews

The CAMPLUX Outdoor Tankless Water Heater has generally received positive reviews from customers, with many praising its powerful performance, user-friendly features, and reliable safety mechanisms. Some users have reported occasional issues with installation or maintenance, but overall, it seems to be a well-received and high-quality option for outdoor water heating needs.

Water Heater Tankless, VANSTON Propane Water Heater Outdoor, 10L 2.64 Portable Water Heaters, Instant Hot Water, Overheating Protection, Easy Installation & Lightweight for RV, Camping

Overview

The VANSTON Propane Water Heater Outdoor is a compact and portable tankless water heater that is well-suited for a variety of outdoor applications, including RV camping, remote cabins, and backyard showers. With a maximum output of 68,100 BTU and a flow rate of 2.64 GPM, it provides reliable and instant hot water on-demand.

Specs

• Maximum power output of 68,100 BTU
• Flow rate of 2.64 GPM
• Adjustable temperature up to 75°C (167°F)
• Operates with water pressure as low as 20 PSI
• Compact and lightweight design (21 lbs)

Pros

• Portable and easy to install
• Provides instant hot water on-demand
• Suitable for a variety of outdoor applications
• Equipped with multiple safety features
• Comes with all necessary accessories for installation

Cons

• May not be as powerful as some larger tankless options
• May require regular maintenance and care for optimal performance

Customer Reviews

The VANSTON Propane Water Heater Outdoor has received generally positive reviews from customers, with many praising its compact size, easy installation, and reliable performance. Some users have reported occasional issues with temperature fluctuations or water pressure, but overall, it seems to be a well-received and versatile option for outdoor water heating needs.

Buying Guide

Tankless Water Heater for Outdoor Shower: What to Consider?

Power Output and Flow Rate

• Consider the size of your outdoor shower and the number of fixtures you need to power.
• Look for a tankless water heater with a high BTU output and flow rate to ensure a consistent and comfortable water supply.

Fuel Type

• Decide whether you prefer a natural gas or propane-powered tankless water heater.
• Natural gas options may be more convenient for permanent outdoor installations, while propane can be better suited for portable or off-grid use.

Safety Features

• Look for tankless water heaters with advanced safety features, such as overheat protection, anti-freezing mechanisms, and flame failure devices.
• These features help ensure safe and reliable operation, especially in outdoor environments.

Durability and Weatherproofing

• Consider the unit’s construction and weatherproofing capabilities, as outdoor tankless water heaters need to withstand exposure to the elements.
• Look for models designed specifically for outdoor use with features like water-resistant housing and wind resistance.

Installation and Maintenance

• Evaluate the ease of installation and any specific requirements, such as ventilation or plumbing connections.
• Also, consider the ongoing maintenance needs, such as periodic cleaning or winterization, to keep your tankless water heater operating efficiently.

FAQ

1. What is the minimum water pressure required for a tankless water heater to work?

The minimum water pressure required for most tankless water heaters to operate is around 15-20 PSI. However, some models, like the CAMPLUX and VANSTON options, can work with water pressures as low as 4 PSI or 20 PSI, respectively, making them more suitable for remote or off-grid applications.

2. Can a tankless water heater be used in freezing temperatures?

Yes, many tankless water heaters designed for outdoor use, such as the ORBEK and GASLAND models, feature anti-freezing protection mechanisms to prevent damage from low temperatures. However, it’s still important to properly maintain and store the unit during colder months to ensure optimal performance and longevity.

3. How do I choose the right BTU size for my outdoor shower?

The BTU size you’ll need for your outdoor shower largely depends on the size of the space, the number of fixtures, and your desired water flow rate. As a general rule, you’ll want a tankless water heater with at least 30,000 BTU for a single-fixture outdoor shower, and up to 120,000 BTU for a larger multi-fixture setup. Consult the manufacturer’s recommendations or a professional installer to determine the optimal BTU size for your specific needs.

4. How do I maintain my outdoor tankless water heater?

Proper maintenance is essential for ensuring the longevity and reliable performance of your outdoor tankless water heater. This typically includes regularly cleaning the unit, checking for any leaks or damage, and flushing the system to remove mineral buildup. Consult the manufacturer’s instructions for specific maintenance requirements, and be sure to properly winterize the unit if it will be stored in cold climates.

5. Can I use a tankless water heater for both indoor and outdoor applications?

Yes, many tankless water heaters can be used for both indoor and outdoor applications, as long as they are properly installed and configured for the specific environment. Look for models that are rated for outdoor use and have features like weatherproofing, anti-freezing protection, and the appropriate BTU output to handle your indoor and outdoor water heating needs.

Conclusion

Choosing the right tankless water heater for your outdoor shower is an important decision that can greatly impact the comfort and convenience of your outdoor bathing experience. By considering factors like power output, fuel type, safety features, durability, and installation requirements, you can select the best option to meet your specific needs. The products reviewed in this guide offer a range of high-quality and reliable tankless water heaters that are well-suited for outdoor use, providing endless hot water and a variety of features to ensure a comfortable and enjoyable outdoor shower experience.