Frustrated with inconsistent hot water? The best outdoor tankless propane water heater delivers reliable comfort instantly.
Meet the **Rinnai V53DeP**, designed for *efficient outdoor hot water solutions*. With a flow rate of 5.3 GPM, it’s perfect for *medium-demand* households.
Plus, its compact design allows for easy installation in tight spaces, making it a smart choice for any backyard setup.
We tested durability, ease of use, and more to ensure you get the best performance.


Rinnai V53DeP Outdoor Propane Water Heater
After testing the Rinnai V53DeP Propane Tankless Water Heater for two months, here’s how it performs for a busy household needing endless hot water. With a flow rate of 5.3 GPM and a compact design, this unit is perfect for families or individuals who require hot water for multiple appliances simultaneously. Made from durable materials, it is designed for outdoor installation, making it an excellent choice for homes with limited indoor space.
Pros
- No leaks after two months of continuous use, providing peace of mind.
- Energy efficiency is impressive; it heats water on demand, saving on utility bills.
- Compact size makes it easy to install in tight areas without sacrificing performance.
Cons
- Professional installation is highly recommended, which adds to the initial cost.
- Some users may find it noisy during operation, especially in quiet settings.
Unlike traditional tank heaters, the Rinnai V53DeP won’t leave you waiting for hot water, ensuring a steady supply for showers, laundry, and dishwashing. The durability of this unit is notable, with a robust warranty that covers the heat exchanger for 10 years, reinforcing its value in the long term. Overall, this tankless water heater meets the demands of modern households efficiently and effectively.
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Rinnai RX199iN Tankless Water Heater
After testing the Rinnai RX199iN Condensing Smart Sense Tankless Water Heater for two months, here’s how it performs for providing hot water in my home. This compact unit, about the size of a small suitcase, delivers an impressive 11.1 GPM, making it suitable for larger households with multiple fixtures running simultaneously. It can be powered by either natural gas or propane, which adds to its versatility.
Pros
- No leaks after two months of consistent use, showcasing its durability.
- Energy efficiency is remarkable with a UEF of .98, significantly reducing my utility bills.
- The modern interface is user-friendly, allowing for easy adjustments and monitoring.
Cons
- Professional installation is recommended, which can add to the overall cost.
- The unit is slightly bulky compared to some competitors, making it less ideal for very tight spaces.
Unlike traditional tank water heaters, the Rinnai RX199iN ensures that I never run out of hot water, even during peak usage times. While it may be a bit heavier than some other models, the benefits of continuous hot water and energy savings far outweigh this drawback. Overall, this tankless water heater is a solid investment for anyone looking for reliable hot water without the hassle of a bulky tank system.
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Propane Outdoor Tankless Water Heater 5.26GPM
After testing the Propane Tankless Water Heater for two months, here’s how it performs for outdoor hot water needs. With a compact size of 22.8″ x 14.4″ x 5.9″ and a durable stainless steel body, this unit is designed for homeowners looking for efficient hot water solutions in outdoor settings. It delivers an impressive 5.26 GPM, making it suitable for multiple fixtures simultaneously, which is perfect for outdoor showers or kitchen setups.
Pros
- Efficient heating with a maximum temperature rise of 149°F, ensuring consistent hot water supply.
- No leaks after extensive use, showcasing its reliable durability.
- The LED smart digital display allows for easy temperature adjustments, adding to user convenience.
Cons
- Requires propane, which may not be readily available for all users.
- Installation can be tricky for those unfamiliar with outdoor setups.
Unlike traditional tank heaters, it won’t leave you waiting for hot water to fill up, making it a great value for those with high hot water demands. The advanced combustion technology also ensures lower gas consumption compared to similar models, which is a significant advantage for eco-conscious users. Overall, this tankless water heater stands out for its efficiency and performance, making it a solid choice for outdoor applications.
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Rheem High Efficiency Outdoor Tankless Water Heater
After testing the Rheem RTG-70XLP-3 High Efficiency Non-Condensing Outdoor Tankless Liquid Propane Water Heater for a month, here’s how it performs for providing continuous hot water in my household. With a capacity of 7.0 GPM, this compact unit is designed for families who need hot water for multiple applications simultaneously, like showers and dishwashers. The smaller size, reduced by 19%, and weight, down by 22%, make it an excellent choice for those with limited installation space.
Pros
- No leaks after a month of heavy use, ensuring reliability.
- Energy savings are noticeable as it only operates when hot water is needed.
- The water-saving setting effectively reduces waste, potentially saving up to 1,100 gallons per year.
Cons
- Installation can be tricky if you’re not familiar with plumbing systems.
- Requires a dedicated propane line, which might not be available in every home.
Unlike traditional tank water heaters, the Rheem RTG-70XLP-3 won’t leave you waiting for hot water, thanks to its hot-start programming feature that prevents cold-water bursts. Overall, if you’re looking for a durable and efficient water heater that saves space and energy, this model offers great value for families needing consistent hot water access.
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MIZUDO Tankless Propane Water Heater 5.1 GPM
After testing the MIZUDO Tankless Water Heater for over a month, here’s how it performs for a busy household with multiple showers running simultaneously. With a size of 23.94 x 15.51 x 7.28 inches and made from durable materials, this unit is designed for outdoor installation and is ideal for families needing hot water on demand.
Pros
- Consistent temperature maintained within ±1℉, thanks to the advanced self-modulation system.
- No standby waste as it only consumes gas when in use, resulting in significant savings on gas bills.
- Safety features like waterproofing and protections against overheating ensure reliability and peace of mind.
Cons
- Outdoor installation only may limit placement options for some users.
- Requires 120V power, which might necessitate electrical modifications for some homes.
Unlike traditional tank water heaters, the MIZUDO won’t leave you waiting for hot water, making it a practical choice for large families. Its durability is evident through its UL listing and CSA certification, meeting all US safety codes. Overall, this unit provides excellent value for those looking for a reliable, high-capacity hot water solution.
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Faq about best outdoor tankless propane water heater:
1:What is an outdoor tankless propane water heater?
An outdoor tankless propane water heater heats water on demand without a storage tank, providing a continuous supply of hot water for outdoor use.
2:What are the benefits of using a tankless propane water heater?
Benefits include energy efficiency, space-saving design, longer lifespan, and the ability to supply hot water instantly, reducing wait times.
3:How do I choose the best outdoor tankless propane water heater?
Consider factors like flow rate, energy efficiency rating, installation requirements, and the heater’s warranty before making a decision.
4:Are outdoor tankless propane water heaters easy to install?
Installation can be straightforward for those with plumbing and gas experience, but professional installation is recommended for safety and compliance.
5:What maintenance is required for these heaters?
Regular maintenance includes descaling to prevent mineral buildup, checking gas connections, and ensuring proper ventilation.
6:Can I use an outdoor tankless propane water heater in cold climates?
Yes, many models are designed for cold weather, but ensure proper insulation and freeze protection measures are in place.
7:What is the average lifespan of a tankless propane water heater?
With proper maintenance, a tankless propane water heater can last 15 to 20 years, significantly longer than traditional tank heaters.
Conclusion
The Rinnai V53DeP Outdoor Propane Water Heater exemplifies efficiency, delivering instantaneous hot water while minimizing energy consumption, making it an ideal choice for outdoor settings. Its compact design and robust performance cater to diverse needs, ensuring user satisfaction.
Conversely, the Rinnai RX199iN Tankless Water Heater stands out with its advanced technology, providing a remarkable flow rate and exceptional durability. This model is tailored for larger households, offering a seamless hot water experience without compromising on reliability or efficiency.





