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Takagi T-H3-DV-N Review – (Condensing / Natural Gas)

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Takagi T-H3-DV-N Condensing High-Efficiency Tankless Water HeaterThe Takagi T-H3-DV-N is an indoor condensing gas-fired tankless water heater with high energy and thermal efficiency. The unit can produce ten gallons per minute, a hot water output that is perfect for medium to large households where multiple facets are used simultaneously.

Due to its high GPM rate, this unit can serve four bathrooms with an endless supply of hot water without fail. The condensing ability makes its operation remarkably silent, a perfect choice for people who love their quiet, although this is expected of a high-tech indoor tankless water unit.

The unit also has a very low nitrogen oxide emission rate, has gas inputs of 199,000 BTU, high energy conversion features, as well as a self-modulating heating mechanism.

The Takagi T-H3-DV has an energy factor of 0.95 for natural gas, making it one of the best energy saver water heaters. At 11.2 x 17.8 x 24.9 inches, it is also one of the smallest tankless water units in its range, and this makes installation in small spaces easy.

Advanced Features

The Takagi T-H3-DV comes with a plethora of advanced control features. It is also long-lasting and comes with a 15-year limited warranty for the residential model and 10-year limited warranty for the commercial model while both have a 5-year limited parts warranty.

However, the unit requires a special venting and pipe system and professional installation, which can be a bit expensive, but it covers this with its incredible energy efficiency.

It is difficult for most people to find a tankless water heater with high water output and high energy efficiency, but the Takagi T-H3-DV offers both and more. It is the best of both worlds with this product, and the flexibility of installation makes mounting it easier regardless of space constraints. Let us now look at the pros and cons of this unit.

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The Takagi T-H3-DV is one of the high volume units from the Japanese tankless water heater manufacturer, and it does not disappoint. The heater offers several enhanced features and benefits that make it an excellent product for consumers with a high demand for hot water.

  • High Volume Output

    The most outstanding feature of the Takagi T-H3-DV is its ability to deliver ten gallons of hot water per minute. With this rate of output, plus a gas input of 199,000 BTU, this unit is capable of serving up to 4 bathrooms, washers, or faucets simultaneously without fail.

    As a household with many occupants, or a small business with several workers, the unit is an excellent on-demand tankless water heater that will keep up with your hot water needs without any trouble. With the Takagi T-H3-DV, there is no fear of the tap suddenly running cold as the capacity is more than enough to cater to your needs.

  • Low Nitrogen Oxide Emission Levels

    The Takagi T-H3-DV features a very low NO2 emission levels to prevent any noxious gas from escaping into your home. It also helps to reduce the footprint on the environment. Additionally, the condenser unit makes the unit remarkably silent, an excellent feature considering that it is designed for indoor installation.

  • High Efficiency

    The Takagi T-H3-DV has several cost-cutting features which enhance its energy efficiency. It has a self-modulating heating mechanism, 0.95 energy factor, surge protection, diagnostics codes, as well as anti-freeze and overheating protection among others. With this unit, you can reduce your water heating bills considerably. Also, the advanced features ensure that the heater serves you diligently for years to come.

  • Compact and Space Saving

    With a body measuring only 11.2 x 17.8 x 24.9 inches, the unit comes in a compact size. This saves space and makes installation more flexible, especially in places where space is an issue. Whether you have a big or small house, mounting this unit will not be a headache.

  • Longevity

    The Takagi T-H3-DV features the best of Japanese and American water heater technology to ensure durability and longevity. The manufacturer provides a limited warranty of 15 years if the heater is used for domestic purposes. And ten years limited warranty for units used in a commercial setting. Both enjoy 5-year limited warranty on parts and one-year conditional warranty on labor.

    Takagi also offers a 6-year limited warranty on the heat exchanger. This is so that you can get maximum value out of your investment. Meanwhile, the company’s products are known to last for over 20 years. So, expect this unit to serve you for up to two decades.

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While the Takagi T-H3-DV has high energy efficiency and ten gallons per minute hot water output, it has a few disadvantages which we shall outline below.

  • Expensive Installation

    The Takagi T-H3-DV is costly to install. One of the reasons for the high installation cost is because it runs on gas. Most homes do not have gas pipes compatible with the heater. So, you need to retrofit your gas and water pipes to fit the unit.

    Also, the unit requires a combustion vent to evacuate the smoke produced by the burning gas. However, the PVC venting ensures that the venting is cool at all times and nothing leaks out of the pipes.

    The high installation costs can also be attributed to the fact that you need professionals to install the Takagi T-H3-DV. Additionally, the heater requires some hardware which is not included in the box. However, it can help you save up to 50 percent on water heating bills. The durability of the product ensures that you will enjoy many years of excellent service.

  • Temperature Drop

    Like most high output tankless water heaters, the Takagi T-H3-DV may be slow in providing water at first. The water temperature may drop by one or two degrees for a short period during heavy use. However, the unit quickly compensates for the loss, and you may not even notice the change.


The Takagi T-H3-DV is a super performer in the tankless water heater industry. It can deliver an impressive ten gallons per minute and has an energy factor of 0.95. Also, it comes in a sleek, little box which makes installation in tight spaces a breeze.

by Water Heater Mag

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