TK-4-IN Takagi Tankless Indoor Water Heater (Natural Gas) Zoom

TK-4-IN Takagi Tankless Indoor Water Heater (Natural Gas)

SKU:T-K4-IN-NG

Brand: Takagi

Takagi
Qty Price
$727.95
/ each
Out of StockAllow 7-10 Days to Ship Out
0

Resources

Specs

Application: 2-3 Showers
Product Type: Tankless Heater
Installation Type: Indoor Only
Fuel Type: Natural Gas
Energy Factor: 0.82
Vent Size: 4"
Inlet Gas Pressure: 5.0-10.5"W.C.
Manifold Pressure: 2.0-2.5"W.C.
Energy Star Rated: Yes
Venting Requirement: Category III Stainless Steel
Vent Type: Direct Vent Convertible
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

Description for Takagi T-K4-IN-NG

Note: Isolation valves are not included but are recommended for installaltion.

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.

Specifications:

  • 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
  • Direct Vent Capability
  • Electric Ignition


TK-REO2 Remote Control is included:

TK-4-IN Takagi Tankless Indoor Water Heater (Natural Gas)

REVIEW SNAPSHOT®

by PowerReviews
TK-4-IN Takagi Tankless Indoor Water Heater (Natural Gas)
 
4.9

(based on 26 reviews)

Ratings Distribution

  • 5 Stars

     

    (23)

  • 4 Stars

     

    (3)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Reviewed by 26 customers

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5.0

exactly as promised, very good product.

By Willdez

from Crossville, TN

Verified Buyer

Comments about TK-4-IN Takagi Tankless Indoor Water Heater (Propane):

this is second unit i have used. first one wouked perfectly until power was off by ice storm for a week and unit froze due to severe cold. .That TK 2 was 10 1/2 years old and needed nothing but inlet screen cleaning. So why would a person look elsewhere with that kind of performance. Biggest proplem with old unit was finding someone that knew how to install them properly. IF you read the instructions these are no more complicated than tank heaters and easier to handle.

 
5.0

Just great

By Cellulose wall sprayer

from Northern Maine

Verified Buyer

Comments about TK-4-IN Takagi Tankless Indoor Water Heater (Propane):

I really like this water heater. Very quiet. Efficient. Using it for domestic water and radiant heat. You must have enough flow to make it work on the radiant heat. I had two loops (1/2" pipe) under bathroom floors and that wasn't enough.

 
4.0

Good Unit

By Ryan

from Baldwin, NY

Verified Buyer

Comments about TK-4-IN Takagi Tankless Indoor Water Heater (Natural Gas):

I recently had this product installed in a 1 family home with 1.5 bathrooms, 1 kitchen w/ dishwasher, and a washing machine. So far the unit is working properly. However, I did notice a drop in hot water pressure since installing it. On the second floor, it does take about 10-15 seconds to get hot water from the faucet and shower. The unit was installed by a professional who has experience with this unit. I do recommend this unit and will update my comment (if possible) in a few months after I compare my gas bills to last year.

 
5.0

Have used Takagi since 2004, THE BEST

By Lionel

from Assiniboia Saskatchewan, Canada

Verified Buyer

Comments about TK-4-IN Takagi Tankless Indoor Water Heater (Natural Gas):

Had great service with two tk2 in carwash,
domestic and hydronic heat in house with tk3,
domestic and hydronic heat in second house with tk3,This tk4 is going the shop infloor heat,all worked great, had trouble with two tkj's when used for hydronic heat, remote has to be reset every time it finishes a cycle[shuts off]
this is my personal history with these heaters in Saskatchewan Canada

(2 of 2 customers found this review helpful)

 
5.0

takagi tk-4-in propane tankless waterhe

By Plumber LOU

from stanton michigan

Verified Buyer

Comments about TK-4-IN Takagi Tankless Indoor Water Heater (Propane):

This tankless waterheater is great. I put it in to replace my old Takagi of 23 years.Lots of good easy to control hot water. Easy to install. Easier than a tank waterheater. I will always have one of these.Supply house is good company to deal with.

(3 of 3 customers found this review helpful)

 
5.0

Out with the old, in with the new

By diy person

from Queens, New York

Verified Buyer

Comments about TK-4-IN Takagi Tankless Indoor Water Heater (Natural Gas):

This has been used for years in Japan and no wonder it is the best. I wish I changed my old standing 50 gallon with pilot water heater. This is just the best! Plenty, plenty of hot water for two showers or more running non stop. Takes up very little space and turns on only when you need it. Install the thermostat that it comes with and you can control exactly what temperature you need for the hot water. It is just perfect. Cannot say anything bad. Here in the US they just sell the big water heaters at the big box stores and waste so much space and energy. What a great thing this is and it is made in Japan, yes Japan. I would give it the best rating. Very, very happy. Installation is easy, and can find samples online just hook the gas, water, install service valves to flush with vinegar once a year to get rid of lime and other deposits and install a pressure regulator on the hot water. Just the best!

 
5.0

I'm very Happy with this product

By chuckaction

from Springfield, MO

Verified Buyer

Comments about TK-4-IN Takagi Tankless Indoor Water Heater (Natural Gas):

easy to install, and my family couldn't be more pleased with the amount of hot water it produces. I would highly recommend this to any person wanting to convert to a tankless system.

 
5.0

Endless hot water

By Steve B

from Midland park nj

Verified Reviewer

Comments about TK-4-IN Takagi Tankless Indoor Water Heater (Natural Gas):

Had it for 2 years never ran out of hot water... It's a great investment .

 
5.0

great product

By R.C.

from Michigan

Verified Buyer

Comments about TK-4-IN Takagi Tankless Indoor Water Heater (Natural Gas):

Works excellent, good product for the price

(2 of 2 customers found this review helpful)

 
4.0

SHORT TERM GOOD RATING.

By JEFF

from KENT, OHIO

Verified Buyer

Comments about TK-4-IN Takagi Tankless Indoor Water Heater (Natural Gas):

IT WAS EASY TO INSTALL BY MYSELF. HOWEVER THIS VOIDED THE WARRANTEE SINCE I AM NOT A LICENSED PLUMBER. LIKE THE REMOTE CONTROL PANEL. I INSTALLED IT NEXT TO THE FURNACE CONTROL. IT'S ONLY BEEN 3 WEEKS SINCE I INSTALLED IT BUT WE'RE VERY HAPPY WITH IT. THE PRICE THROUGH PEX SAVED US A LOT OF MONEY OVER THE CONTRACTORS PRICE. TAKAGI IS OWNED BY A.O. SMITH COMPANY SO THAT HELPED MY CONFIDENCE LEVEL ON DECIDING ON THIS PRODUCT.

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Q&A: Ask the Questions, share answers

Do you have questions about this product?

Get answers from real customers and in-house experts with AnswerBox.

21 Questions | 31 Answers
Displaying questions 1-10Previous | Next »
  • TK-4-IN Takagi Tankless Indoor Water Heater (Natural Gas)

    Q:

    do these require single wall or double wall pipe for venting?
    Asked on 4/15/2015 by capone from utah

    1 answer

    • CUSTOMER CARE

      A:

      Unfortunately this is not a simple answer, as venting is governed by local codes. Please have the installer confirm what is required by code.

      Answered on 4/16/2015 by Supplyhouse Staff from New York
  • TK-4-IN Takagi Tankless Indoor Water Heater (Propane)

    Q:

    i have a tankless water heater now but it does not require any elec does this one
    Asked on 3/3/2015 by happy from wallawalla wa

    1 answer

    • CUSTOMER CARE

      A:

      Yes, this tankless water heater requires a properly grounded 120 Volt AC power connection to operate.

      Answered on 3/4/2015 by SupplyHouse Staff from NY
  • TK-4-IN Takagi Tankless Indoor Water Heater (Natural Gas)

    Q:

    Does the unit need to be nearest the sinks, shower and washing machine for proper operation while simultaneous being able to provide enough hot water for the radiant floor heat ? Will a zone valve with thermostat need to be added in order to effect floor heating separately ? In other words how is the radiant floor heat separated from the domestic hot water so that when using domestic water your not heating up the house ? Additionally the residence is only 500 square foot micro home... Will this unit be to large or do I need the Jr model ?
    Asked on 1/24/2015 by Jimbo from Jersey City, N.J.

    1 answer

  • TK-4-IN Takagi Tankless Indoor Water Heater (Natural Gas)

    Q:

    Can this unit be vented with PVC?
    Asked on 1/7/2015 by Mike from PA

    1 answer

    • CUSTOMER CARE

      A:

      no, it can not

      Answered on 1/8/2015 by Supplyhouse Staff from New York
  • TK-4-IN Takagi Tankless Indoor Water Heater (Propane)

    Q:

    DOES THE UNIT HAVE IT.S OWN PUMP
    Asked on 10/25/2014 by RON from EGF,MN.

    1 answer

    • CUSTOMER CARE

      A:

      No, the unit does not include a circulator.

      Answered on 10/28/2014 by SupplyHouse Staff from NY
  • TK-4-IN Takagi Tankless Indoor Water Heater (Propane)

    Q:

    I bought a Takagi TK4in lp and the supply and delivery plumbing is 3/4 inch but my hot water feed lines to the showers is 1/2. Will it work?
    Asked on 10/24/2014 by joe from cape cod MA

    1 answer

    • CUSTOMER CARE

      A:

      yes it will, you will to reduce after the connection off the unit, it will effect the flow rate.

      Answered on 10/27/2014 by Supplyhouse Staff from New York
  • TK-4-IN Takagi Tankless Indoor Water Heater (Natural Gas)

    Q:

    I plan to replace my 50 gallon natural gas water heater with a tankless when it dies. Is it OK to use the existing exhaust vent through the roof? This would be best since I have just had new shingles installed and the roof is good for the next 20 years.
    Also: Is and exterior intake vent required for these water heaters?
    Asked on 10/10/2014 by Sterling from Hanna, Wyoming - Elevation 7000 ft.

    1 answer

    • CUSTOMER CARE

      A:

      Most likely no, the TK-4 requires category III stainless steel venting, and it is unlikely that your current venting is made of this material.

      Answered on 10/24/2014 by SupplyHouse Staff from NY
  • TK-4-IN Takagi Tankless Indoor Water Heater (Natural Gas)

    Q:

    Will any of the Takagi units work for an in floor radiant heat system for 1400 sq ft home? Home is in Albuquerque, New Mexico -5000 ft altitude.
    Asked on 9/10/2012 by Shaleen

    2 answers

    • VERIFIED BUYER

      A:

      yes they will, I heat a 1400 sq ft house in chicago with one takagi jr.

      Answered on 9/10/2012 by Anonymous
    • CUSTOMER CARE

      A:

      Any of the Takagi units (even the T-KJr.) should be fine for a house that size. Just make sure to use primary/secondary piping and make the proper dipswitch adjustments for high-altitude installations.

      Answered on 9/27/2012 by PexSupply Staff from NY
  • TK-4-IN Takagi Tankless Indoor Water Heater (Propane)

    Q:

    Does this unit have any problems with the "water sandwich" effect, with short bursts of cold water in the middle of hot water flow, especially in showers?
    Asked on 5/4/2012 by Joe from Napa, CA

    6 answers

    • VERIFIED BUYER

      A:

      Not at all. this is the 4th tankless water heater I have owned and by far
      the best. The temp is super consistent and the delivery is much quicker
      than the Bosch I owned previously. It has never failed to light, not once.
      Would recommend without reservation!

      Answered on 5/4/2012 by Another PexSupply Customer
    • VERIFIED BUYER

      A:

      I have never had any issues with the water sandwich effect.

      Answered on 5/4/2012 by Another PexSupply Customer
    • VERIFIED BUYER

      A:

      No not at all I have installed 4 this year no complaints
      Sent from my iPhone

      Answered on 5/4/2012 by Another PexSupply Customer
    • VERIFIED BUYER

      A:

      No! This is not problem with the unit I have. This can happen if you
      have poor water pressure at times of showering.

      Answered on 5/4/2012 by Another PexSupply Customer
    • VERIFIED BUYER

      A:

      no unit always has hot water

      Answered on 5/5/2012 by Another PexSupply Customer
    • VERIFIED BUYER

      A:

      I have 3 of these heaters and have never experienced what you described. You can get some water cooling if someone else opens a hot faucet while you are showering. It does not go cold just not as hot.

      Answered on 5/5/2012 by Another PexSupply Customer
  • TK-4-IN Takagi Tankless Indoor Water Heater (Propane)

    Q:

    I am purchasing the TK-4 IN Propane, and am wanting to know more about the venting system. I am looking at using the Z-Vent self sealing bent parts from your site. I see the direct vent conversion part, am I right in assuming that when you chose to use it then you add the "2nd" pipe (thus a 3nd opening) and another hole for intake? If I use the sealed Z-Vent parts, and do not 'convert it", then I wont need a second opening or pipe?
    Asked on 3/15/2012 by blmranch from Ellensburg, WA

    4 answers

    • VERIFIED BUYER

      A:

      Yes. Just direct vent the exhaust ( 1 ) penetration 99.9 % of installs will do it.
      Sent from my iPhone

      Answered on 3/15/2012 by Another PexSupply Customer
    • VERIFIED BUYER

      A:

      Hello bimranch,
      I have install four TK-4 heaters. You need to use  stainless pipe for the 4" discharge. This is required by manufactor. Z-vent is the brand I have used and the product is easy to install. 
      On the intake side, the conversation kit covers the front intake and provide a 3" intake on the top of the unit. This piping does not have to be stainless steel pipe.
      If you do not use the conversion kit the unit takes air from the front of the unit and know other piping is required. 
      Hope this helps,
      jim

      Answered on 3/15/2012 by Another PexSupply Customer
    • VERIFIED BUYER

      A:

      Direct vent should be used when you do not have enough fresh air (like a trailer) or in a dust room like a work shop. just stick with the Z-vent and you will be fine.

      Answered on 3/16/2012 by Another PexSupply Customer
    • VERIFIED BUYER

      A:

      it only takes two pipes( one for intake ,one for exhaust) unless you use the
      concentric(sic) pipe then it uses one pipe for both intake and venting. i was
      able to download the installation manual . it shows all installation methods. (
      if you do not use the direct vent conversion there is only the one exhaust pipe
      and intake air is drawn from the mechanical room.

      Answered on 3/16/2012 by Another PexSupply Customer
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