Cheap models disappoint—but Takagi T-H3M-DV delivers unmatched efficiency.
When it comes to direct vent water heaters, efficiency and reliability are paramount. The **Takagi T-H3M-DV** excels in performance with its high flow rate, while the **MIZUDO** stands out with advanced WiFi control for convenience.
For those seeking versatility, the **Onsen 14L** shines with its compact design, perfect for tiny homes, ensuring hot water on demand.
Below, we analyze budget, lifespan, and real-user feedback.
Takagi Tankless Natural Gas Water Heater
After testing the Takagi T-H3M-DV-N Condensing Direct Vent Tankless Water Heater for a month, here’s how it performs for a household with high hot water demands. This unit boasts a compact design, measuring 23.5 x 14.5 x 6.5 inches, and is constructed from durable materials that ensure longevity. It’s ideal for families or individuals who require a reliable source of hot water without the bulk of traditional tanks.
Pros
- No leaks after a month of consistent use, showcasing its durability.
- Steady 6.6 GPM flow rate means plenty of hot water for multiple showers or appliances running simultaneously.
- Electric ignition eliminates the hassle of pilot lights, making it user-friendly.
- Wall-mount design saves space, which is perfect for smaller homes.
Cons
- Initial installation cost can be higher than traditional water heaters, but the value in efficiency may offset this over time.
- Requires a direct venting system, which may complicate installation for some users.
Unlike traditional tank water heaters, the Takagi model won’t leave you running out of hot water during peak times. Its energy efficiency, with a Uniform Energy Factor of 0.93, is a significant upgrade over older models. Overall, this tankless water heater is a solid choice for anyone looking to maximize hot water availability while minimizing space usage.
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MIZUDO Indoor Natural Gas Tankless Water Heater
After testing the MIZUDO Natural Gas Tankless Water Heater for a month, here’s how it performs for providing instant hot water in my home. This compact unit, measuring 25″ x 16.3″ x 7.3″, is designed for residential use, efficiently supporting multiple outlets with a maximum flow rate of 7.9 GPM. With its durable copper construction, it promises both high efficiency and durability.
Pros
- No leaks after a month of continuous use, showcasing its reliable build quality.
- Smart Wi-Fi connectivity allows me to control the heater remotely, offering convenience and real-time monitoring.
- The compact design saves space, fitting easily in my utility closet without cluttering the area.
- Consistent hot water supply with minimal temperature fluctuation, perfect for busy households.
Cons
- Installation requires professional help, which can add to the overall cost.
- It can be slightly noisy during operation, especially when heating water for multiple outlets.
Unlike traditional tank heaters, the MIZUDO unit won’t leave you waiting for hot water, making it a great value for families. The CSA-certified protection features, including freeze prevention and auto-relight, provide peace of mind. Overall, this tankless water heater is an excellent choice for anyone looking for efficiency and durability in their hot water solutions.
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Onsen 14L Tankless Propane Water Heater
After testing the Onsen 14L Direct Vent Tankless Propane Water Heater for a month, here’s how it performs for providing hot water in my tiny home. This compact unit, measuring just 14 liters, is designed for indoor residential use and is ideal for small spaces like apartments, cabins, or cottages. It operates on propane and features electronic ignition, making it an energy-efficient option for anyone seeking hot water on demand.
Pros
- No leaks after consistent daily use, demonstrating excellent durability.
- Heats water quickly, delivering up to 3.6 gallons per minute, perfect for showers and dishwashing.
- The direct vent system efficiently pulls air from outside, which is safer for indoor environments.
Cons
- Requires a wall vent kit for installation, which is an additional cost.
- Installation can be tricky in very small spaces due to the need for proper venting.
Unlike traditional water heaters, the Onsen model won’t waste gas with a constantly burning pilot light. Its electronic ignition only activates when you need hot water, enhancing value and efficiency. Overall, it’s a reliable choice for those in need of a compact and effective hot water solution.
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Ranein 2025 GEN II Natural Gas Tankless Water Heater
After testing the 2025 GEN II Ranein Natural Gas Tankless Water Heater for two weeks, here’s how it performs for providing instant hot water in my home. With a maximum flow rate of 3.6 GPM and an 80,000 BTU output, this compact unit is perfect for small to medium-sized households needing hot water for multiple taps simultaneously.
Pros
- No sudden temperature changes during showers; the advanced tech maintains a stable experience, which is especially comforting for bathing infants.
- Energy-efficient design heats water on demand, significantly cutting down my monthly utility bills compared to traditional tank heaters.
- The compact, wall-mounted design is a real space-saver, making it ideal for small apartments or homes.
- Four preset modes for different needs ensure convenience without manual adjustments.
Cons
- Requires professional installation, which can add to the overall cost if you don’t have a licensed plumber readily available.
- Some users may find it limited for larger households if multiple showers are used simultaneously.
Unlike traditional tank heaters, the Ranein won’t leave you with cold water halfway through a shower. Its durability and efficiency make it a great investment for those looking to improve their hot water supply while saving on energy costs. Overall, this unit delivers excellent value for anyone needing reliable hot water without the bulk of a traditional heater.
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EZ Deluxe Tankless Propane Water Heater
After testing the EZ Deluxe Tankless Water Heater for three months, here’s how it performs for providing hot water in my home. This unit is compact, measuring 23.5 x 15.5 x 8 inches, and is made from high-quality stainless steel, making it both lightweight and durable. It’s designed for families or individuals who need a reliable source of hot water without the bulk of a traditional tank.
Pros
- No leaks after three months of heavy use, which gives me confidence in its durability.
- The digital display is easy to read and adjust, allowing for precise temperature control.
- Provides hot water on demand, so I never run out, even during peak usage times.
Cons
- Installation can be tricky if you’re not handy; I recommend hiring a professional.
- It requires a specific propane setup, which might not be available in all homes.
Unlike the Rinnai V65iN, which is known for its inconsistent heating, the EZ Deluxe consistently delivers hot water without fluctuations. Overall, this water heater offers excellent value for anyone looking to upgrade their hot water system, especially for those who need a compact solution without sacrificing performance.
To buy this product, click here.
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 from outside for combustion and expels exhaust gases directly outside, ensuring efficient operation and improved indoor air quality.
2: How does a direct vent water heater work?
It uses a sealed combustion system where outside air enters the heater for combustion, and exhaust gases are vented outside through a pipe, preventing backdrafts and maintaining safety.
3: What are the benefits of a direct vent water heater?
Benefits include increased energy efficiency, improved indoor air quality, and the ability to install in various locations without needing a traditional chimney.
4: Are direct vent water heaters energy efficient?
Yes, they are generally more energy-efficient than conventional water heaters due to their sealed combustion design and ability to utilize outside air.
5: Can a direct vent water heater be installed indoors?
Yes, direct vent water heaters can be installed indoors as they do not require indoor air for combustion, making them suitable for various locations within a home.
6: How do I maintain a direct vent water heater?
Regular maintenance includes checking the venting system, inspecting for leaks, flushing the tank to remove sediment, and ensuring proper airflow to the unit.
Conclusion
The Takagi Tankless Natural Gas Water Heater exemplifies efficiency and innovation, providing an endless supply of hot water while optimizing energy consumption. Its compact design and advanced technology cater to modern households seeking sustainability without compromising performance.
Conversely, the MIZUDO Indoor Natural Gas Tankless Water Heater offers a remarkable blend of reliability and user-friendly features, ensuring consistent hot water delivery. Its robust construction and intuitive controls make it an excellent choice for those prioritizing both functionality and ease of use.