Takagi T-K4-IN Indoor Tankless Water Heater, Natural Gas, 190KBTU, incl. TK-RE02
Brand: Takagi
Part#: T-K4-IN-NG
This product has been discontinued.
Direct Replacement:
SKU: TK-310U-I
Brand: Takagi

Takagi T-K4-IN-NG Tankless Water Heater has gas inputs up to 190,000 BTU per hour and an energy factor of 0.82. The all new Takagi T-K4-IN-NG has an impresive max GPM of 8.0GPM.

Includes TK-RE02 Remote Temperature Controller.

This Tankless Water Heater adds 1 more shower over the Takagi T-KJr2 at minimal increase in cost and is perfect for domestic hot water as well as hydronic/radiant heating applications in mid size residential homes or apartments with 2-3 bathrooms.

Takagi Tankless Water Heater T-K4-IN has four preset temperatures: 113F, 122F, 131F, 140F.  

To achieve any temperatures other than those presets, use the Takagi TK-RE02 remote temperature controller .

To convert the water heater from a standard vent system to a direct‐vent (or sealed combustion) system, use TK-TV10 Direct‐Vent Conversion Kit. By default (indirect vent), the unit will use the intake air from the room where it is installed.

  • Fully modulating, gas fired tankless water heater
  • Indoor installation only(Direct-vent convertible)
  • Safety Features:
  • – Air-Fuel Ratio (AFR) sensor
  • – Exhaust & Water Temperature Safety Control
  • – Overheat Cutoff Fuse
  • Internal Freeze-Protection System
  • Manual reset high limit switch
  • Horizontal or Vertical Installation
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Technical Specifications:
  • Fuel Type: Natural Gas
  • Max BTU Rating: 190,000 BTU/h
  • Min BTU Rating: 11,000 BTU/h
  • Max. Flow Rate: 8 GPM (Gallons Per Minute)
  • Water Pressure: 15 - 150 psi (40 psi or above is recommended for maximum flow)
  • Energy Factor (Natural Gas): 0.82
  • Hot/Cold Water Connections: 3/4" NPT
  • Gas Connection: 3/4" NPT
  • Weight: 34.6 lbs
  • Dimensions (inches): 20.3" high x 13.8" wide x 8.5" deep
  • Electric Consumption: 120 VAC
  • Standby: 0.05 A, Operation: 0.73 A, Freeze-Protection: 0.93 A
  • Ignition: Electric Ignition
  • Natural Gas Pressure Inlet: 5.0" W.C. min.
  • 10.5" W.C. max
  • Manifold Presure (Natural Gas): 2.0" W.C.
  • Temperature Settings (dipswitch settings without remote controller): 113F, 122F, 131F and 140F
  • Temperature Range (with TK-RE02 Remote Control): 99 - 167F (122F Default factory Setting)
  • Venting Intake: 3" O.D. (ABS, PVC, Galvanized Steel, Corrugated Stainless Steel or Category III/IV Stainless Steel)
  • Flue/Exhaust: 4" O.D. (Category III Stainless Steel)
  • Vent: 50' Max Length, 5 elbows max
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