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Takagi T-K4U - 5.3 GPM at 60° F Rise - 0.82 EF - Gas Tankless Water Heater - Outdoor
Model:
T-K4U-OS-NG
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Optional Accessories
2
Frequency
Frequency
Select how often you will receive your air filters, we offer many options to meet your air quality standards.
Quantity
Quantity
This will be how many filters you receive per delivery.
Quantity
$24.50
In-Stock
Frequency
Frequency
Select how often you will receive your air filters, we offer many options to meet your air quality standards.
Quantity
Quantity
This will be how many filters you receive per delivery.
Quantity
$205.00
In-Stock
Features
Fuel
Natural Gas
Location
Outdoor
# of Showers
2.5
Energy Factor
0.82
- Ultra-Low NOx Emissions
- The T-K4U-OS-N is designed to qualify for the most stringent Low NOx standards. This includes SCAQMD standards and other air quality management districts meant to limit pollution in the southwest United States.
- Heavy Duty Heat Exchanger
- The primary heat exchanger is built out of copper, offering better heat transfer than stainless steel and designed to be more resilient towards erosion. Takagi water heaters are built to last and save you money in the process.
- Multiple Safety Features
- T-K4U models come with a long list of safety features standard. These include: built in freeze protection, manual reset hi limit, an overheat cutoff fuse, inlet and outlet thermistors to monitor temperatures, and a built-in flame sensor.
- Installation and Control Options
- Takagi outdoor heaters come standard with an included remote control.
Takagi has been delivering innovative residential and commercial hot water solutions for over 60 years. Their line of tankless water heaters are unmatched in quality and diversity, providing the perfect hot water solution for any situation. The T-K4U-OS-N features a copper heat exchanger, which helps to stabilize outgoing water temperature and reduce pressure drops compared to a standard stainless steel exchanger. The T-K4U line is also designed to meet Ultra-Low NOx standards, meaning it's good for you wallet and the environment.
California residents see
WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm..
For more information go to: www.p65Warnings.ca.gov
Specifications
T-K4U-OS-NG
General Information
Type
Tankless Water Heater
Medium
Medium
Medium refers to the substance that carries heat through the heating system. Systems are either designed to use either Hot Water or Steam as a medium, and components are usually specific to one or the other.
Hot Water
Heat Exchanger Material
Copper
Fuel Type
Fuel Type
To create heat, some form of fuel is required. Fuel Type specifies what the product uses as an input to create heat.
Natural Gas
Combustion Type
Combustion Type
Condensing appliances use leftover thermal energy from combustion gases to heat water in a secondary heat exchanger, resulting in higher efficiency and lower exhaust temperature.
Non-Condensing
Vent Type
Vent Type
Products that use combustion (burning) of fuel to create heat also create potentially dangerous gasses that need to be exhausted (AKA "Vented"). Depending on the product, venting can be done via a chimney, through a side wall, or use a second vent to provide fresh air to the appliance.
Outdoor (No Venting)
Storage Type
Tankless
Mount Type
Wall
Installation Location
Outdoor
Maximum Altitude
6000 Feet
UPC
671657141769
Additional Model Numbers
T-K4U-OS-N, T-K4U-OS-NG
Performance
Maximum Input Capacity
Maximum Input Capacity
The Maximum Input Capacity describes how quickly the appliance will use fuel when delivering it's maximum capacity. The units may change depending on the fuel being used.
190000 BTU
Minimum Input Capacity
15000 BTU
Flow Rate at 40F Temperature Rise
Flow Rate at 40F Temperature Rise
Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More
7.9 GPM
Flow Rate at 50F Temperature Rise
Flow Rate at 50F Temperature Rise
Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More
6.2 GPM
Flow Rate at 60F Temperature Rise
Flow Rate at 60F Temperature Rise
Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More
5.3 GPM
Flow Rate at 70F Temperature Rise
Flow Rate at 70F Temperature Rise
Flow rate measures how much hot water your heater can deliver. Click Learn More to determine the appropriate temperature rise to use based on your location. Learn More
4.5 GPM
Energy Factor
Energy Factor
Energy Factor (EF) is a measurement of water heater energy efficiency. The higher the energy factor, the more efficient the water heater. Learn More
0.82
Minimum Flow Rate
0.5 GPM
Flow Rate at 77F Temperature Rise
4.2 GPM
Ultra Low NOx Emissions
Ultra Low NOx Emissions
NOx is a byproduct of the combustion process, and it's output is regulated in some jurisdictions. Many regulators mirror SCAQMD rules, which regulate air quality for some parts of Southern California. Ultra Low NOx appliances emit less than 10-14 ng/J (nanogram per Joule) of NOx. Learn More
Yes
Electrical Data
Voltage
120 Volts
Phase
1
Frequency
60 Hz
Dimensions
Gas Connection Size
3/4 Inch
Cold Water Inlet
3/4 Inch
Hot Water Outlet
3/4 Inch
Product Height
20 1/4 Inches
Product Width
13 3/4 Inches
Product Depth
23/24 Inch
Product Weight
37 Pounds
Certifications
CSA Listed
Yes
AHRI Certified
Yes
AHRI Reference Number
5440790
Warranty Information
Parts Warranty
Parts Warranty
A warranty is a safeguard from defects in manufacturing and can vary in length and terms. Some manufacturers require registration for extended warranty benefits, be sure to check out features and the warranty document. To see the manufacturer's warranty statement, click on the Manuals tab. Learn More
5 Years
Heat Exchanger Warranty
15 Years
Reviews
(3)
Takagi T-K4U-OS-NG Reviews & Ratings
So far, so good.
By Alexi M.
Boulder, Colorado
Purchased 04/24/2018 |
Review Posted 05/17/2018
This unit has been installed for just over a week and it's doing well so far. My only complaint is that the water takes longer to get hot at the tap on an upstairs bathroom. I installed this unit because of a bathroom remodel that included a 70 gallon soaking tub. I think it will be just fine for filling up the tub with hot water. I wonder about the efficiency of the unit when it turns on for a short burst of hot water, but future energy bills will tell. Also, if you're installing it as a DIY'er, vertical venting can be tricky. I had to replace the galvanized flue with stainless Z-flex and along with the special drain valves and plumbing, it was almost as much as the heater.
Alexi M. Recommends This
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Rating Breakdown
5/5
5/5
4/5
5/5
Pros:
Price, High Quality
Cons:
tricky installation
Nice unit
By David A.
Tallahassee, Florida
Purchased 01/22/2018 |
Review Posted 05/01/2018
We installed this product several months ago and I am very pleased. The installation was fairly straight forward, and we have been pleased with performance. Time will tell how this product works over the long haul. The PVC venting ability really makes this model stand out for me. So far so good.
David A. Recommends This
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Rating Breakdown
5/5
5/5
5/5
4/5
Easy instalation.
By Herbert M.
Sandy Creek, New York
Purchased 01/15/2018 |
Review Posted 02/12/2018
After buying a gas regulator, supply lines and adapter fittings, the installation was simple. It has only been 2 months, but so far everything works absolutely perfect.
Herbert M. Recommends This
Was this review helpful?
Rating Breakdown
5/5
5/5
5/5
5/5
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Takagi T-K4U - 5.3 GPM at 60° F Rise - 0.82 EF - Gas Tankless Water Heater - Outdoor
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