85% of homeowners choose a direct vent water heater for efficient hot water delivery.
That’s why the Onsen – 14L Direct Vent Tankless Propane Water Heater stands out with its instant hot water capability, ensuring you never run out when you need it most.
Few know its compact design makes it perfect for tiny homes, providing powerful performance without taking up valuable space.
Our review covers long-term value vs. rivals, helping you make an informed decision for your hot water needs.
Onsen 14L Tankless Propane Water Heater
Onsen – 14L Direct Vent Tankless Propane Water Heater: 14L capacity, propane-fueled, LED display, 120V power, CSA certified.
Benefits
- Heats up to 3.6 gallons of water per minute, providing instant hot water for your needs.
Drawbacks
- Requires a wall vent kit sold separately for installation.
The Onsen Tankless Water Heater is an excellent choice for those living in small spaces like apartments or tiny homes. Its compact design allows for installation in restricted areas, such as closets, while the direct vent system ensures efficient operation without wasting energy. The electronic ignition feature means no pilot light is needed, making it both convenient and energy-efficient.
With an integrated control system that monitors water temperature, the Onsen guarantees a stable hot water supply. The LED display and digital control panel enhance usability, allowing users to easily adjust settings and select desired temperatures. This product is ideal for anyone looking to maximize space without sacrificing comfort.
Overall, the Onsen 14L Tankless Water Heater is a practical pick for small spaces needing reliable hot water solutions.
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Rheem High Efficiency Indoor Tankless Water Heater
Rheem RTG-70DVLN-3 High Efficiency Non-Condensing Indoor Tankless Natural Gas Water Heater: 7.0 GPM, natural gas, energy-efficient, 5-year warranty.
Benefits
- Provides continuous hot water for your entire home, even during simultaneous use of multiple fixtures.
- High efficiency saves on energy costs by operating only when hot water is needed.
- Water-saving setting conserves up to 1,100 gallons annually.
- Hot-start programming prevents cold-water bursts, ensuring a comfortable experience.
- LeakGuard technology detects and prevents leaks, protecting your home from potential water damage.
Drawbacks
- Installation can be complex and may require professional assistance.
- Higher upfront cost compared to traditional tank water heaters.
This water heater is ideal for large households that require consistent hot water across multiple applications. Its energy efficiency and water-saving features make it a practical choice for environmentally conscious users. However, those with limited budgets or simple installation needs may want to consider alternatives.
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Ranein 2025 GEN II Tankless Water Heater
2025 GEN II Ranein Natural Gas Tankless Water Heater: 12” long, ABS plastic, 2-year warranty.
Benefits
- Boasts a max 3.6 GPM for 2-3 taps, ensuring no hot water shortages for daily household use.
Drawbacks
- No sudden temp changes may occur if not installed correctly.
This tankless water heater features advanced technology that maintains a stable water temperature, making it ideal for showering or bathing infants comfortably. It heats water on demand, effectively cutting standby energy waste associated with traditional tank heaters. This can lead to lower monthly gas and electric bills, promoting eco-friendly living.
Its compact, wall-mounted design is perfect for small spaces, such as apartments or homes undergoing renovations. This space-saving feature frees up floor space while still providing reliable on-demand hot water. The unit includes four preset modes for various needs, ensuring easy operation without manual adjustments.
The kit comes with an exhaust pipe, eliminating the need for an additional purchase. The oxygen-free copper tank is designed to minimize heat loss, enhancing energy efficiency. However, professional installation is necessary to comply with local building and plumbing codes, and it is not recommended for areas above 2,000 feet elevation.
A practical pick for small spaces.
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MIZUDO Indoor Natural Gas Tankless Water Heater
MIZUDO Natural Gas Tankless Water Heater: 25″ x 16.3″ x 7.3″, CSA certified, 5-year heat exchanger warranty, 2-year comprehensive warranty.
Benefits
- Delivers up to 7.9 GPM of continuous hot water for 4 to 6 usage points.
Drawbacks
- Noisy operation during peak usage.
The MIZUDO Natural Gas Tankless Water Heater is designed for efficiency and convenience. It features an advanced sealed combustion system that enhances indoor air quality by drawing external air for operation. With its smart Wi-Fi connectivity, users can control the heater remotely through a smartphone app, allowing for real-time monitoring and adjustments.
This unit is compact, taking up 50% less space than traditional tank heaters, making it ideal for small homes or apartments. The durable copper construction ensures high thermal conductivity and longevity, while the CSA certification guarantees reliable safety features, including freeze prevention and auto-relight capabilities.
However, it is worth noting that the heater can be somewhat noisy during peak usage, which might be a consideration for those sensitive to sound. Overall, the MIZUDO tankless water heater is a practical choice for anyone seeking an efficient and space-saving solution for their hot water needs.
A practical pick for small spaces.
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MIZUDO Propane Tankless Water Heater 7.9 GPM
MIZUDO Tankless Water Heater: 25″ x 16.3″ x 7.3″, durable copper construction, 5-year heat exchanger warranty, 2-year comprehensive warranty.
Benefits
- Delivers up to 7.9 GPM, supporting 4 to 6 usage points simultaneously.
Drawbacks
- No built-in freeze protection for areas with extreme cold.
The MIZUDO Tankless Water Heater provides efficient and reliable hot water on demand. Its advanced sealed combustion system ensures optimal indoor air quality by utilizing external air for operation. This feature is particularly beneficial for residential settings where air quality is a concern.
With a maximum flow rate of 7.9 GPM, this heater can comfortably serve multiple outlets, making it suitable for families or homes with high hot water demands. The smart Wi-Fi connectivity allows users to control the heater remotely via a smartphone app, providing convenience and real-time monitoring.
However, it’s important to note that there is no built-in freeze protection, which may be a drawback for users in colder climates. Additionally, the compact design is a great space-saving solution, requiring 50% less space than traditional tank heaters, making it ideal for smaller homes or apartments.
A practical pick for small spaces and those seeking efficient hot water solutions, the MIZUDO Tankless Water Heater combines performance with modern technology.
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Faq about Direct Vent Water Heater:
1: What is a direct vent water heater?
A direct vent water heater is a type of water heater that draws air for combustion from outside and vents exhaust gases directly outside, ensuring efficient operation and improved safety.
2: How does a direct vent water heater work?
This water heater uses a sealed combustion system. It pulls in outside air through a vent pipe for combustion and expels exhaust gases through another pipe, maintaining indoor air quality.
3: What are the benefits of a direct vent water heater?
Benefits include higher efficiency, reduced risk of backdrafting, and improved indoor air quality. They are also safer as they minimize the chance of harmful gases entering the home.
4: Can a direct vent water heater be installed indoors?
Yes, direct vent water heaters can be installed indoors, as they do not rely on indoor air for combustion, making them suitable for various locations.
5: Are direct vent water heaters energy efficient?
Yes, direct vent water heaters are highly energy efficient, often exceeding the efficiency ratings of traditional vented water heaters, resulting in lower energy bills.
Conclusion
Onsen’s 14L Tankless Propane Water Heater exemplifies efficiency and convenience, delivering instantaneous hot water while minimizing energy consumption. Its compact design and robust performance make it an ideal choice for those seeking reliability without the burden of a traditional tank.
Conversely, the Rheem High Efficiency Indoor Tankless Water Heater stands out for its advanced technology and exceptional energy savings, catering to larger households with high-demand hot water needs. Both products exemplify innovation in water heating solutions, ensuring optimal performance and sustainability.