Item # bci2223788

The Takagi T-K4U-OS-NG has been discontinued

** See similar or replacement items below **

Takagi 190000 BTU Outdoor Whole House Tankless Water Heater

Model: T-K4U-OS-NG

Discontinued
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Product Overview

This product has additional required/recommended options. To configure, add to your cart.

Featuring a power vented flue this tankless water heater uses sealed combustion and is fully modulated, making it perfect for domestic hot water systems. It can also be used with water storage tanks, recirculation systems, hydronic heating systems, radiant floor heating systems, and/or combined domestic & heating applications while complying with Ultra-Low NOx regulations, lead free standards, and being Energy Star® Qualified.

Features:

  • Energy Star Qualified
  • Overheat Cutoff Fuse and Built-in Freeze Protection
  • Efficient, Durable and Easy to Install
  • Stronger than Standard Copper and More Resilient Against Erosion
  • Complies with Lead Free Standards
  • Includes Built-in Temperature Controller and Diagnostics
  • 3 or 4 Inch Venting
  • Up to 8 Gallons Per Minute
  • Acceptable for up to 4 Showers
  • Electric Ignition

HRS35 copper is an alloy that is 99.5% pure copper with a .5% mixture of other elements, this alloy is much stronger and harder than the standard C1220, which is the copper. HRS35 has 8 times the tensile strength of standard copper

Energy Star is an international standard for energy efficient consumer products originated in the United States of America. It was created in 1992 by the Environmental Protection Agency and the Department of Energy. Devices carrying the Energy Star service mark, such as computer products and peripherals, kitchen appliances, buildings and other products, generally use 20%–30% less energy than required by federal standards.

Following the South Coast Air Quality Management District (AQMD), several other AQMDs have adopted regulations to require residential water heater (<75,000 Btu/hr heat input) NOx emission to be less than 10 nanograms per joule of heat output. The South Coast AQMD also requires that tankless water heaters to have NOx emission less than less than 14 nanograms per joule of heat output or less than or equal to 20 ppm (at 3% O2, dry).

Specifications:

  • 20.5 Inch Height
  • 13.8 Inch Width
  • 8.5 Inch Depth
  • Weight: 40 Pounds
  • Energy Factor: .82
  • BTU: 15,000-190,000
  • Gas and Water Connections: 3/4" NPT
  • Water Pressure: 15-150 PSI
  • 120V AC
  • Nominal Dimensions: 13-4/5" (W) x 8-1/2" (D) x 20-1/2" (H)

Why choose Takagi? Takagi produce some of the most highly efficient tankless water heaters in the industry. With a commitment to innovation and quality, they are constantly creating new technology to keep up with their customers’ ever-changing hot water needs. Takagi sets the bar with the most stringent of durability testing standards for all of our models. For 15 years, Takagi has provided the most eco-friendly, energy-efficient water heating solutions in North America.


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


*Denotes a finish or option that has been discontinued.

Dimensions and Measurements

Depth
8.5 in.
Duct Size
3" Round, 4" Round
Gas Connection
3/4"
Height
20.5 in.
Maximum Flow Rate
10 GPM
Maximum Gas Input
190000
Maximum Vent Length
100, 70 ft.
Minimum Flow Rate
0.4 GPM
Product Weight
37 lbs.
Water Connection
3/4"
Water Pressure (Max)
150 PSI
Width
13.8 in.

Characteristics and Features

Configuration
Tankless Water Heater
Heating Technology
Non-Condensing
Indoor Installation
No
Natural Gas Input (Max)
190000
Natural Gas Input (Min)
15000
Natural Gas Pressure (Max)
10.5

Electrical and Operational Information

Energy Factor
0.82
Fuel Type
Natural Gas
NG Energy Factor
0.82
Power Supply
AC 120V
Voltage
120

Warranty and Product Information

Approved for Commercial Use
No
Energy Star
Yes
Indoor Approved
No
Low Lead Compliant
Yes
Outdoor Approved
Yes
Product Variation
Whole House Water Heater