Takagi TKJR2INLP Liquid Propane Liquid Propane Compact Tankless Water Heater 6.6 GPM – Indoor

- Item #: BCI1738693
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This product has additional required/recommended options. To configure, add to your cart.

  • Exhaust Backflow Recommended
  • Wall Thimble Recommended
  • Recess Box Recommended

Liquid Propane Compact Tankless Water Heater 6.6 GPM – Indoor and Direct Vent

The T-KJR-IN-LP 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. 
This small, powerful unit can meet all the hot-water needs of a small American home or apartment with one or two bathrooms.  Designed to replace a conventional 40-gallon tank heater, the compact, wall mounted T-K Jr. can support hydronic baseboard or radiant floor heating applications, as well as provide domestic hot water to plumbing fixtures and appliances.


  • Capacity 1-2 Showers (Depending on climate)
  • Gas Fired Tankless Water Heater
  • Indoor and Direct Vent Installation Only
  • Safety Features: Air-Fuel Ratio Sensor (AFR), Exhaust and Water Temperature Safety Control, and Overheat Cutoff Fuse
  • Internal Freeze Protection System
  • Manual reset switch
  • Power Cord Included


  • Min 19,500 BTU/h
  • Max 140,000 BTU/h
  • Energy Factor - 0.82
  • Dimensions - H 20.3" x W 13.8" x D 8.5"
  • Weight - 33 lbs
  • Clearance- Top: 12", Bottom: 12", Front: 24", Back: 1", Sides: 2 "


  • Horizontal or Vertical Installation
  • Power Vent
  • Electric Ignition
  • Flu 4" O.D. - Category III Stainless Steel Only
  • Intake 3" O.D. (ABS, PVC, Galvanized Steel, Corrugated Stainless Steel, Category III/IV Stainless Steel
  • 50" Max Length
  • 5 Elbow MAX (90 degree Elbow = 5' length)


  • TK-RE02 - Temperature Remote Control (Included)
  • TK-PCJr2 - Pipe Cover
  • 9007674005 - Heater Recess Box
  • 9007996005 - Backflow Preventer & F-F Adapter
  • 9007667005 - Direct Vent Conversion Kit
  • 9007605005 - Isolation Valve Kit




Additional Takagi Links

Our SKU: Takagi T-KJR2-IN-LP

This product is listed under the following manufacturer number(s):

*Denotes a finish or option that has been discontinued

Takagi TKJR2INLP Product Specifications

Specification Sheet
Approved for Commercial Use Yes
Configuration Tankless Water Heater
Default Temperature 122
Depth 6.7
Direct Vent No
Fuel Type Liquid Propane
Function Non-Condensing
Gas Connection 3/4"
Height 20.3
Ignition Type Electronic
Indoor Installation No
Liquid Propane Pressure (Max) 14.0 WC
Liquid Propane Pressure (Min) 8.0 WC
Low Lead Compliant Yes
Maximum Gas Input 140000
Minimum Gas Input 19500
Outdoor Installation Yes
Power Supply AC 120V
Product Weight 33
Temperature (Max) 167
Temperature (Min) 99
Water Pressure (Max) 150
Water Pressure (Min) 15
Width 13.8

Installation Resource Center

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Takagi T-KJR2-IN-LP Reviews

Rated 4 out of 5 by from big bang for small size Last unit lasted for 9 years hopefully this unit goes further now that water pH is monitored. straightforward switch out for the most part. Plenty of shower hot water..thats all we use it for... but advertized to handle up to two bathrooms and a dishwasher.
Date published: 2013-08-20
Rated 5 out of 5 by from Reliable and Easy to Install Had this for around a month following a Rheem which lasted about 5 years before finally being thrown in the trash. No comparison in the quality of the units. I am really happy with this unit which provided more than enough Hot water for my 3 bed 2 bath house. Should have gone Takagi from day one. The support from Takagi is a dream compared to Rheem who provide no service manuals or assistance when things go wrong.
Date published: 2014-05-20
Rated 5 out of 5 by from Small with WIDE range of temps and BTU auto set by usage. I have 2 of these units now and could not be happier. They are automatic and cover from 19,500 to 140,000 BTU on demand. You can preset the max temp desired and the unit does the rest based on flow and water temp. Very powerful for its compact size. Took 1 hour to install and instant continuous hot water in the whole house!
Date published: 2014-06-18
Rated 3 out of 5 by from Good and bad Pros: The water heater works as advertised. It is energy efficient, as the exhaust pipe only gets slightly warm. Never run out of hot water, once flowing. Remote control very handy. Cons: It takes longer to initially get hot water than a tank water heater, and wastes water. I seem to get a lot of cold or lukewarm water. If you don't run the hot water continuously, you get periods of cold water then hot. I turned the temperature up to 131 degrees to get the water hot enough. A US Government study says it only heats 3.3 gallons/minute at 135 degrees. Plenty for a low-flow shower.
Date published: 2014-04-01
  • Can this unit be installed indoors?


    The Takagi T-KJR2-IN-LP can be installed indoors.

  • Is the T-KJR2-IN, efficient enough for 2 adults taking showers,and using 1 sink?

    A. The Takagi T-KJR2-IN-LP is efficient enough for this!

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