TCT-199O-N - 199,000 BTU Natural Gas Outdoor Condensing Ultra-Low NOx


TCT-199O-N (Outdoor)

ENERGY STAR QualifiedThe CT-199 series are High Efficiency Commercial Ultra-Low NOx gas tankless water heaters with condensing technology featuring up to 0.95 Uniform Energy Factor (UEF) which lowers operating costs and is environmentally friendly. 

Number of showers this unit can handle, depending on ground water temperature.

Warmer Climates

Cooler Climates


  • ENERGY STAR® qualified
  • 6-year limited Heat Exchanger Warranty, 5-year parts warranty, 1-year labor warranty for Commercial applications
  • Primary heat exchanger is constructed of a commercial grade copper that is more resilient to erosion.
  • Secondary heat exchanger is made of type 316L stainless steel to protect against corrosion.
  • Complies with Ultra-Low NOx regulations of less than 14 ng/J (<20ppm)
  • Easy-Link with up to three other CT-199 units to increase flow capacity
  • Condensing Outdoor model
  • Safety features include Air-Fuel ratio (AFR) sensor, freeze protection, overheat cut-off fuse, exhaust & water temperature safety control, and troubleshooting diagnostic codes

Tech Specs

Emissions: Ultra-Low NOx
Maximum BTUs: 199,000
Minimum BTUs: 15,000
Water Connection Location: Bottom
Water Connection: 3/4"
Flow Rate: 10.00
Heat Exchanger: Commercial Grade Copper
Voltage: AC 120V
UEF: 0.95
ENERGY STAR® Qualified: Yes
LEED Rating: 1.5
Remote Control: Yes
Technology: Condensing
Multilink: Yes

Dimensions & Venting

Height: 23.63"
Width: 17.75"
Depth: 11.25"
Product Weight: 70 lbs.
Vent Type: Direct Vent
Vent Size: 3 or 4"


This model is intended for Outdoor installation, no venting is required.

Please check the Product Manual for information on proper installation.


Pipe Cover

The 9008331005 Pipe Cover protects the plumbing pipes to the water heater from unexpected adjustments. This pipe cover is fixed to the bottom of the water heater, which hides the plumbing and improves the visual aspects of the whole installation for the water heater.


For Use with the following models:

T-H3J-IN, T-H3J-OS, T-H3S-IN, T-H3S-OS, T-H3-IN, T-H3-OS

Multiple Unit Controller

The 9008300005 Multi System Controller is capable of handling up to 20 units at one time. It also works as a diagnostic tool that provides error codes.

For Use with the following models:

T-D2U-IN, T-D2U-OS, T-H3-IN, T-H3-OS, TK-510C

Remote Temperature Controller

The 9008172005 Temperature Remote Controller (TM-RE40) is designed for commercial tankless applications that require higher outlet temperatures. It also works as a diagnostic tool that will give a concise error code whenever there is a problem with the unit.

For Use with the following models:

T-H3-IN, T-H3-OS

Lead Free Isolation Valves & Pressure Relief Valve

The 9007604005 Lead Free Isolation Valves & Pressure Relief Valves are used to isolate a unit for service. The Pressure Relief Valve is to help protect the unit and release if the pressure in the tankless water heater or hot water system exceeds 150 psi and up to 200,000 BTUs. For 3/4" water lines. (1953 Compliant)

For Use with the following models:

TK-110C-NI, TK-310C-NI, TK-510C-NI, T-KJr2/U, T-K4/U, T-D2/U, T-H3M, T-H3J, T-H3S, T-H3


The 9007607005 Neutralizer assembly neutralizes the condensate (acidic water) that forms in the secondary heat exchanger of the water heater. It connects to the condensate drain port of the water heater by using connectors included with the neutralizer kit.

For Use with the following models:

T-H3M-IN, T-H3M-OS, T-H3J-IN, T-H3J-OS, T-H3S-IN, T-H3S-OS, T-H3-IN, T-H3-OS 


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