Best Propane Tankless Water Heater for Tiny House [In 2025]

Owning a tiny house comes with its own set of unique challenges, and one of the most critical considerations is the water heating system. Propane tankless water heaters have emerged as a popular choice for tiny house dwellers, offering on-demand hot water and efficient energy usage. In this comprehensive review, we’ll explore the top propane tankless water heater options for your tiny house, providing you with the insights you need to make an informed decision.

5 Best Propane Tankless Water Heater for Tiny House Reviews

GASLAND Outdoors Propane Tankless Water Heater BS264-2.64GPM Instant Hot Water Heater

Overview

The GASLAND Outdoors Propane Tankless Water Heater BS264-2.64GPM is a compact and powerful unit designed for use in a variety of off-grid scenarios, including tiny houses, cabins, and RVs. It offers a maximum output of 68,000 BTU/Hr, providing up to 2.64 gallons of hot water per minute.

Specs

Key features:

• 2.64GPM/10L Propane Water Heater with maximum power output of 68,000BTU/Hr
• Temperature rise of 109.4°F (43°C) at the highest point and 55.4°F (13°C) at the lowest point
• Low water pressure start-up, requires just 3.6 PSI of water pressure
• Runs on a standard 20 lb. liquid propane tank with electronic ignition
• Includes CSA certified gas regulator, hose, 5-foot shower head, and mounting hardware

Pros

• Compact and portable design, suitable for various off-grid scenarios
• Provides a good flow rate of hot water for showering and other tasks
• Easy to install and set up, with all necessary accessories included
• Offers good value for the price

Cons

• Durability concerns, with some reports of units breaking down quickly
• Water temperature can be too hot to touch, requiring careful adjustment
• Potential issues with leakage, which can be a safety concern

Customer Reviews

Customers generally find the GASLAND Outdoors Propane Tankless Water Heater to be a good choice for their needs, particularly for outdoor use and in off-grid settings. They appreciate its quality, ease of setup, and value for money. However, concerns have been raised about the unit’s durability and the ability to maintain a comfortable water temperature.

GASLAND BE158 Portable Outdoor Propane Tankless Water Heater

Overview

The GASLAND BE158 Portable Outdoor Propane Tankless Water Heater is another compact and versatile option for tiny house owners. With a maximum output of 41,000 BTU/Hr, it can deliver up to 1.58 gallons of hot water per minute, making it suitable for outdoor showers, RV use, and other off-grid applications.

Specs

Key features:

• 1.58GPM/6L Propane Water Heater with maximum power output of 41,000BTU/Hr
• Temperature rise of 109.4°F (43°C) at the highest point and 55.4°F (13°C) at the lowest point
• Low water pressure start-up, requires just 3.6 PSI of water pressure
• Runs on a standard 20 lb. liquid propane tank with electronic ignition
• Includes CSA certified gas regulator, hose, 5-foot shower head, and mounting hardware
• Features advanced safety protections, including overheating, low water flow, and dry combustion protection

Pros

• Compact and portable design, suitable for outdoor use and off-grid living
• Provides a good flow rate of hot water for outdoor showers and other tasks
• Easy to install and set up, with all necessary accessories included
• Offers good value for the price
• Includes advanced safety features for added peace of mind

Cons

• Durability concerns, with some reports of units breaking down quickly
• Water temperature can be inconsistent, with some customers reporting lukewarm water
• Temperature adjustment can be challenging for some users

Customer Reviews

Customers generally find the GASLAND BE158 Portable Outdoor Propane Tankless Water Heater to be a reliable and functional unit, particularly for outdoor showers and other off-grid applications. They appreciate its straightforward installation, value for money, and the included safety features. However, some customers have reported issues with water temperature consistency and durability concerns.

18L Tankless Water Heater, Propane Gas, Outdoor Up to 4.74 GPM, 85,300 BTU On-Demand Instant Hot Water Heater

Overview

The 18L Tankless Water Heater is a powerful and efficient propane-powered unit that can deliver up to 4.74 gallons of hot water per minute. With a maximum output of 85,300 BTU, it’s designed for outdoor use in yards, cabins, and campsites, making it a suitable option for tiny house owners.

Specs

Key features:

• Dimensions: 24″ x 7.1″ x 13.8″, Weight: 20.7 lbs
• Heating capacity of 85,300 BTU, delivering up to 4.74 GPM of hot water
• Temperature range of 55.4°F to 109.4°F, making it ideal for outdoor use
• Operates at a minimum water pressure of 3.6 PSI, suitable for low-pressure areas
• Equipped with 6 advanced safety protections and backed by a 2-year warranty

Pros

• Powerful heating capacity and high flow rate, suitable for multiple usage points
• Compact and space-saving design, ideal for tiny houses and outdoor settings
• Operates at low water pressure, making it suitable for rural or off-grid areas
• Backed by a 2-year warranty and professional customer support

Cons

• Limited customer reviews available, making it difficult to assess long-term durability
• Outdoor installation is recommended, which may not be suitable for all tiny house layouts

Customer Reviews

There are currently limited customer reviews available for the 18L Tankless Water Heater, making it difficult to draw definitive conclusions about its performance and reliability. However, the product specifications and features suggest it could be a suitable option for tiny house owners seeking a powerful and efficient propane tankless water heater for their outdoor needs.

Propane Tankless Water Heater, 4.21GPM 16L Indoor,Instant Hot Propane Gas Water Heater with Fahrenheit Digital Display,Multi-Protection

Overview

The Propane Tankless Water Heater from this brand is a compact and versatile unit designed for both indoor and outdoor use. With a maximum output of 68,000 BTU and a flow rate of up to 4.21 gallons per minute, it’s well-suited for tiny houses and other small living spaces.

Specs

Key features:

• Dimensions: 13.4″ x 5.9″ x 21.65″, Weight: 20.7 lbs
• Heating capacity of 68,000 BTU, delivering up to 4.21 GPM of hot water
• Temperature range of 95°F to 149°F, with a digital display for precise control
• Operates with a minimum water pressure of 3.6 PSI
• Equipped with multiple safety protections, including a flame failure device and anti-freezing protection

Pros

• Compact and lightweight design, suitable for both indoor and outdoor use
• Powerful heating capacity and high flow rate, meeting the needs of small living spaces
• Digital temperature display for easy and precise control
• Includes various safety features for reliable and safe operation

Cons

• Limited customer reviews available, making it difficult to assess long-term performance and durability
• Outdoor installation is recommended, which may not be suitable for all tiny house layouts

Customer Reviews

As with the previous model, there are currently limited customer reviews available for this Propane Tankless Water Heater. The product specifications and features suggest it could be a suitable option for tiny house owners seeking a compact and efficient propane-powered water heating solution, but further customer feedback would be needed to fully assess its performance and reliability.

Buying Guide: Choosing the Best Propane Tankless Water Heater for Your Tiny House

Considerations for Tiny House Owners

• Flow Rate and Heating Capacity: Consider the number of simultaneous usage points (e.g., shower, kitchen sink) and choose a unit with a sufficient flow rate and heating capacity to meet your needs.
• Dimensions and Weight: Opt for a compact and lightweight model that fits seamlessly into your tiny house layout, without compromising performance.
• Installation and Ventilation: Ensure the unit is easy to install and that your tiny house provides the necessary ventilation for safe operation.
• Safety Features: Look for models with advanced safety protections, such as overheating, low water flow, and anti-freezing mechanisms.
• Durability and Warranty: Consider the unit’s build quality and the manufacturer’s warranty to ensure long-lasting performance in your tiny house.

Key Features to Look for

• High BTU output and flow rate for efficient hot water delivery
• Compact and lightweight design for easy installation in tiny houses
• Advanced safety features, including overheating and freeze protection
• Ease of use, with digital temperature controls and display
• Reliable customer support and warranty coverage

Pros and Cons of Propane Tankless Water Heaters for Tiny Houses

Pros:

• Efficient energy usage, reducing overall operating costs
• Compact and space-saving design, ideal for tiny house layouts
• Instant hot water delivery, eliminating the need for a storage tank
• Versatility in outdoor and off-grid applications

Cons:

• Potential durability concerns, with some models reported to break down quickly
• Difficulty in maintaining consistent water temperature for some users
• Outdoor installation may not be suitable for all tiny house configurations
• Limited customer feedback for newer or lesser-known models

FAQ

1. Can a propane tankless water heater be used in a tiny house?

Yes, propane tankless water heaters are well-suited for tiny houses. They offer efficient energy usage, compact design, and instant hot water delivery – all important considerations for small living spaces.

2. What is the ideal flow rate for a propane tankless water heater in a tiny house?

The ideal flow rate will depend on your specific hot water needs and the number of simultaneous usage points in your tiny house. Generally, a flow rate of 2-4 gallons per minute (GPM) is suitable for most tiny house applications.

3. Do I need to provide additional ventilation for a propane tankless water heater in a tiny house?

Yes, proper ventilation is crucial for the safe operation of a propane tankless water heater in a tiny house. Ensure the unit is installed in a well-ventilated area and that any necessary exhaust pipes are properly installed.

4. How often do I need to maintain a propane tankless water heater in a tiny house?

Propane tankless water heaters typically require minimal maintenance, with an annual inspection and cleaning recommended. However, it’s essential to follow the manufacturer’s instructions for your specific model to ensure optimal performance and longevity.

5. Can a propane tankless water heater be used in cold weather in a tiny house?

Yes, many propane tankless water heaters are designed to withstand cold weather conditions. However, it’s essential to take proper precautions, such as draining the unit when not in use and ensuring it is installed in a protected, well-insulated area.

Conclusion

Choosing the best propane tankless water heater for your tiny house is a crucial decision that can significantly impact your living experience. The models reviewed in this article offer a range of features, performance, and price points to consider. By carefully evaluating your specific needs, such as flow rate, heating capacity, and safety features, you can find the perfect propane tankless water heater to meet the unique demands of tiny house living. With the right unit in place, you can enjoy the benefits of efficient, on-demand hot water, even in the most compact of living spaces.