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  • Takagi T-K4-OS NG Natural Gas Outdoor Tankless Water Heater

    Brand & Part #: Takagi T-K4-OS-NG SKU #: taktk4osng

    UPC #: 671657108274

    Availability : In stock

    Regular Price: Was: $1,230.00


    You Save $497.71 (40%)

    Manufacturer Info

    See All Takagi Products

    Additional Documents

    Product Specifications

    Helpful Information



    TK-REO2 Remote Control is included

    Released in 2010, the T-K4 improves upon many of the features from the T-K3. The T-K4 is one of Takagi's smaller tankless water heaters. At 13.8 inches wide and weighing only 38 pounds, its ultra-compact design allows it to be mounted on a wall.

    Takagi's newest tankless water heater also features an energy factor of 0.82, so it is extremely efficient and environmentally friendly. Since tankless water heaters only burn gas when hot water is needed, installing this unit can help homeowners save up to 45% on their monthly gas bills.

    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 to 3 Bathrooms
    • Flow Rate: Maximum 8.0 GPM
    • Gas Inputs: 11,000 to 190,000 BTU per hour
    • Energy Factor Rating: 0.82
    • Inlet Gas Pressure: Min: 5.0" W.C. / Max 10.5" W.C.
    • Dimensions: 20.3" H x 13.8" W x 8.5" D
    • No Venting Required
    • Electric Ignition


    Application: 2-3 Showers
    Product Type: Tankless Heater
    Fuel Type: Natural Gas
    Installation Type: Outdoor Only
    Energy Factor: 0.82
    Inlet Gas Pressure: 5.0-10.5"W.C.
    Manifold Pressure: 2.0-2.5"W.C.
    Energy Star Rated: Yes
    Warranty: 12 Year Ltd. Warranty on Heat Exchanger/ 5 Year on Parts
    Height: 20.3"
    Width: 13.8"
    Depth (Inches): 8.5"
    Max Flow (GPM): 8
    Voltage: 120v
    Gas Input: 11000-190000 BTU/h
    Water Connection: 3/4"
    Gas Connection: 3/4"
    Temperature Range (F): 99°-167°F
    PSI Range: 15-150 psi
    Weight (lbs): 38 lbs

    Additional Info

    Additional Info

    MPN T-K4-OS-NG
    Brands Takagi
    Install Location Outdoor
    Fuel Type Natural Gas
    GPM (Flow Rate) 8.00
    BTU Input 175,000 - 200,000
    Availability Available to Ship Immediately
    Special Shipping Group boilerover


    Customer Reviews (1)

    So Far - great productReview by Larry G
    At this price it was a no brainer!

    My local Plumbing Supply store highly recommended it for its price range and handling requirements range and said it would work well for my 3+2. - of Course they were 160.00 more and could not meet the price from HomePerfect, and Amazon was still Out of stock

    Remodel in Garage allowed us to replace a 25 year old Water Heater and use the area for a Shower
    My contractor had no issues installing on the outside wall, and it is working quite well after 1 week (Posted on 3/12/2015)
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