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Takagi T-K4 Indoor-Outdoor Propane-NG Tankless Water Heater

by Takagi
Original price $749.00 - Original price $829.00
Original price
$749.00 - $829.00
Current price $749.00


Takagi T-T-KJr2 Indoor/Outdoor Propane/NG Tankless Water Heater

This efficient and compact tankless water heater is the perfect hot water solution for your home.

The Takagi T-K4 is a gas fired, fully modulating, compact tankless water heater ideal for residential applications. With a heat output of 190,000 BTU, the T-K4 produces enough hot water for three bathrooms in areas with a warm climate.

The T-K4 directly or indirectly provides hot water to residential hot water systems through an indoor or outdoor installation. It can be used with storage tanks, hydronic heating systems, recirculation systems, radiant floor systems, and domestic heating applications.


• Energy Factor of 0.82 for LPG and NG
• Max flow rate of 8.0 GPM at 35°F temp rise (4.4 GPM at 70°F rise)
• ENERGY STAR® qualified
• Venting with Category III stainless steel
• Indoor model includes power cord
• Both models come with a remote control
• Safety features include overheat, freeze, surge protection, and diagnostic codes for troubleshooting


Natural Gas Input Min. 11,000 Btu Max. 190,000 Btu
LPG Input Min. 11,000 Btu Max. 190,000 Btu
Gas Connection 3/4" NPT
Water Connection 3/4" NPT
Natural Gas Pressure Inlet Min. 5.0" W.C. Max. 10.5" W.C.
LP Gas Pressure Inlet Min. 8.0" W.C. Max. 14.0" W.C.
Weight 38 lbs
Dimensions 20.5" x 13.8" x 8.5"
Ignition Electronic Ignition
Electrical Supply AC 120V (60 Hz)
Water Pressure Min. 15 psi Max. 150 psi
Natural Manifold Pressure 2.0-2.5" W.C.
LP Manifold Pressure 3.7-4.0" W.C.


Specification Sheet Download

Installation Manual and Owner’s Guide Download

Alternate item numbers: Takagi TK4, TK-4, TTK4