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Takagi T-KD20 Tankless Water Heater
Venting options and accessories information page


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Example of a T-K2 Installed Indoors and on the floor The Takagi T-KD20 water heater is state of the art and uses a sealed combustion direct vent system. No Indoor Air is used for combustion.

The T-KD20 should not be used for outside applications - use the Bosch AquaStar 250SX0, Takagi T-K2, TM1 or TKjr for outside applications in mild climates.



Hanging brackets for hanging a T-K2 inside or outside on a wall
Model TK-BK01
Wall Hanging Bracket. Mounting of the T-KD20 is accomplished 3 ways. Free standing on a noncombustible base, wall mounting on a noncombustible base, or hung on a wall using the optional Wall Hanging Kit: TK-BK01.

Vent for the T-KD20 - 2 Pipe system 4-inch and 3-inch
Model TK-TV05
Click for picture (front)

Click for picture (back)
This is the Vent Terminator for the Direct Vent T-KD20 - and is a must for the T-KD20. The TK-TV05 is the only vent terminator approved for the T-KD20 by Takagi. This Vent has a 4-inch hole for the exhaust and a 3-inch hole for the input air. Dimensions of the Vento-Box are: 13 3/4 inches wide by 12 inches tall by 6 3/4 inches deep. Click on text to the left for larger pictures of front and back of the Takagi Vento-Box.

Remote control unit to control water temperature of the T-K2 waterheater
Model TK-RE02
Temperature Remote Controller. The output temperature of the T-KD20 can be controlled with a remote controller (up to 150 feet away) with the optional TK-RE02. The controller model TK-RE02 can adjust the output temperature from 100°F (38°C) to 167°F (75°C).

Back flow preventer for the T-K2 Hot Water Heater
Model TK-TV03
A 4-inch back draft preventer should be used when outside temperatures are below 32°F. The TK-TV03 prevents cold air from freezing the heat exchanger on the T-KD20.

ZFlex Venting Accessories for the AquaStar 125FX, Takagi T-K JR, T-K2 and T-KD20
Z-Flex Venting
Z Flex Stainless Steel Venting Accessories with silicone free connections. See our full line of pipe, exterior terminators, elbows and more. Perfect for vertical or horizontal installation. Stainless Steel Venting is required for all Takagi Water Heaters (Exhaust Only).
Click here to see sizes and prices for ZFlex Venting Supplies


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