TK-510U-E Series 200 - 199,000 BTU Natural Gas/Liquid Propane Outdoor Non-Condensing Ultra-Low NOx


TK-510U-E (Outdoor)

The TK-510U-E Series 200 is a fully modulating, gas fired, non-condensing tankless water heater specifically designed for residential and commercial applications. The TK-510U-E can produce enough hot water for up to four bathrooms in warmer climates and it also complies with Ultra-Low NOx regulations of less than 14 ng/J (<20ppm)

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

Warmer Climates

Cooler Climates


The TK-510U-E supplies hot water to domestic hot water systems and can be used with water storage tanks, recirculation systems, and/or combined domestic & heating applications.

  • 15-year limited heat exchanger, 5 yrs limited parts Residential use
  • 5-year limited heat exchanger, 5 yrs limited parts Commercial use
  • Field convertible from Natural Gas to Liquid Propane
  • Includes a remote control as standard features
  • Venting with Category III stainless steel
  • Safety features include freeze, overheat, surge protection, and troubleshooting diagnostic codes
  • Complies with Ultra-Low NOx regulations of less than 14 ng/J (<20ppm)
  • Easy-Link up to four units without a Multi-Unit Controller
  • Multi-Link up to 20 units with a Multi-Unit Controller

TK-510U Certifications

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: Copper
Voltage: AC 120V
UEF: 0.81
ENERGY STAR® Qualified: No
LEED Rating: 0.0
Remote Control: Yes
Technology: Non-Condensing
Multilink: Yes

Dimensions & Venting

Height: 20.50"
Width: 13.75"
Depth: 9.50"
Product Weight: 40 lbs.
Vent Type: Direct Vent
Vent Size: 4"


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

Please check the Product Manual for information on proper installation.


Recess Box

The 9007674005 Recess Box completely houses the tankless hot water unit and allows it to be completely recessed into a wall for a smooth, almost seamless look. It is just over 14 inches wide so it easily fits in-between the studs.

For Use with the following models:

T-KJr2-OS, T-KJr2U-OS, T-K4-OS, T-K4U-OS, T-D2-OS, T-D2U-OS

Pipe Cover

The 9007670005 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-KJr2U-IN, T-KJr2U-OS, T-K4-IN, T-K4-OS, T-K4U-IN, T-K4U-OS, T-D2-IN, T-D2-OS, T-D2U-IN, T-D2U-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

Product Preservers® Anti-Scale System

Did you know more than 85% of American homes have hard water and that hard water scale is a leading cause of failure for tankless water heaters?

The Product Preservers® Anti-Scale System protects your tankless water heater from damage due to scale formation. This system does not add chemicals to the water or require electricity. As water flows through the filter, hard water minerals form inactive scale crystals which flow through the water heater without sticking to the heat exchanger.

The system virtually maintenance free as the filter only needs to be changed every two years. Replacing the filter is easier, faster, and needs to be less frequently than using isolation valves to flush a water heater with a cleaning solution to remove scale buildup.





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