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Takagi TK Jr. Tankless Water Heater
On Demand Hot Water Heaters - fueled by Natural Gas or Propane
for Domestic & Radiant Heating Applications


Takagi TKJR Tankless Water Heaters (Propane Gas Only!) are eligible for a 2009 Federal Tax Credit.
Click here for more information.


TKJR Tankless Water Heater TK JR Water Heater
At just twenty inches high, and weighing only fourty pounds, the T-K Jr. is the most compact unit in the Takagi line. Designed to produce endless hot water and radiant heating for smaller homes, the T-K Jr. uses the same innovative technology as the original Takagi units - only on an even smaller scale.

The T-KJR Water Heater is an instantaneous, tankless water heater designed to supply endless hot water to your entire household and/or commercial facility utilizing total efficiency. The principle behind the T-KJR Water Heater is simple. Once you open a hot water tap, water flows through the T-KJR Water heater. Once a minimum of 0.75 GPM is achieved, the flow sensor automatically commands the computer to turn on the fan, activate the electronic igniter and open the gas valves. The computer monitors water temperature, water flow rate and gas flow to ensure that you get the right amount of hot water at the correct hot water temperature.

After the burners are ignited, the “fire on” lamp is lit. The computer will modulate the gas supply valve and water flow. 0.75 gallons per minute is required to turn the burners on; after the burners are ignited, the flow rate can be lowered to 0.6 gallons per minute to maintain the heater on. It is advisable to open further the cold tap rather than decreasing the hot tap to adjust the water temperature.

As long as you have water, gas and electricity, you will get an endless flow of hot water. Open a hot water tap to turn on your water heater. Close the tap to turn off your water heater. Takagi T-KJR Tankless Water Heaters are designed for residential, commercial and on-demand water heating. The T-KJR is also a great heat source for radiant heat and other hydronic heating applications.


Would you like to use a Takagi T-KJR as a heat source?
Click here for more info.

Purchase a Takagi TKJr, choose gas type, accessories and more on the buy page

TKJR Vent Accessories

Vertical Vent Diagram

T-KJR Tech & Specs

T-KJR Warranty Info

TKJR Indirect Water Heater and Heating Applications

How to Recirculate Domestic Hot Water

Tax Credit for 2009


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