Takagi T-K4-OS-LP White On-Demand Tankless Water Heater 8.0 GPM

- Item #: BCI1880932

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Takagi T-K4-OS On-Demand Liquid Propane Tankless Water Heater 8.0 GPM

The T-K4 models have an impressive max GPM of 8.0GPM, enough capacity to meet the needs of most residences.

The T-K4-OS has a built-in power venting system and was designed specifically for outdoor installations. The T-K4-OS does not require any additional Category III venting or vent caps, making installation one step easier for installers.


  • Capacity 2-3 Showers (Depending on climate)
  • Gas Fired Tankless Water Heater
  • Outdoor 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


  • Min 11,000 BTU/h
  • Max 190,000 BTU/h
  • Energy Factor - 0.82
  • Dimensions - H 20.3" x W 13.8" x D 8.5"
  • Weight - 38 lbs
  • Clearance- Top: 36", Bottom: 12", Front: 24", Back: 1", Sides: 2 "


  • No Venting Required
  • Electric Ignition


  • TK-RE02 - Temperature Remote Control (Included)
  • TK-PC01 - Pipe Cover
  • TK-RB02 - Recess Box


Additional Takagi Links

Our SKU: Takagi T-K4-OS-LP

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

  • Takagi TK4OSLP

*Denotes a finish or option that has been discontinued

Takagi TK4OSLP Product Specifications

Specification Sheet

Installation Resource Center

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