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T-D2 199,000 BTU Natural Gas Outdoor Tankless Water Heater

T-D2 199,000 BTU Natural Gas Outdoor Tankless Water Heater

T-D2 199,000 BTU Natural Gas Outdoor Tankless Water Heater
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T-D2-OS-N or T-D2-OS-NG (Outdoor Direct Vent Natural Gas Tankless Hot Water Heater)

The T-D2-OS-N energy effecient on demand non-condensing natural gas tankless outdoor hot water heater is well suited for residential 2 - 4 bathroom homes depending on climate as well as commercial applications such as small restaurants and beauty salons. Utilizing HRS35 copper alloy for the heat exchanger tubing, the T-D2 series is also suitable for heavier-residential usages such as space heating or domestic recirculation systems. Remote control included as a standard feature.

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

Warmer Climates 

Cooler Climates 


The T-D2 supplies hot water to domestic hot water systems (directly or indirectly) which can be used with storage tanks, recirculation systems, hydronic heating systems, radiant floor systems, and/or domestic & heating applications.
  • Includes power cord as standard feature
  • Venting with Category III stainless steel
  • Easy-Link up to four units without a Multi-Unit Controller
  • Safety features include freeze, overheat, surge protection, and troubleshooting diagnostic codes
  • 15-year limited heat exchanger, 5 yrs limited parts Residential use
  • 6-year limited heat exchanger, 5 yrs limited parts Commercial use

Tech Specs

Emissions: Low NOx
Maximum BTUs: 199,000
Minimum BTUs: 19,500
Water Connection Location: Bottom
Water Connection: 3/4"
Flow Rate: 10.00
Heat Exchanger: Copper
Voltage: AC 120V
UEF: 0.80
ENERGY STAR® Qualified: No
LEED Rating: 0.0
Remote Control: Yes
Technology: Non-Condensing
Multilink: No

Dimensions & Venting

Height: 20.25"
Width: 13.75"
Depth: 9.50"
Product Weight: 45 lbs.
Vent Type: Direct Vent
Vent Size: 4"