Loading... Please wait...
  • CUSTOMER SERVICE1 (877) 418-3938 FREE
  • Largest Online E-tailerLarge selection of water heaters
  • Satisfaction GuaranteedLowest Prices, Great Service
  • Image 1

Takagi T-H3-OSNG 199,000 BTU Natural Gas Outdoor Condensing Ultra-Low Nox


The T-H3 is well suited for residential/ commercial applications such as small restaurants and beauty salons. Complies with Ultra-Low NOx regulations. Utilizing HRS35 copper alloy for the heat exchanger tubing, the T-H3 is also suitable for heavier residential usages such as space heating or domestic recirculation systems. Remote control included as a standard feature. Certified up to 10,100 ft. altitude. Number of showers this unit can handle, depending on ground water temperature.

The T-H3 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.


  • ENERGY STAR® qualified
  • 15-year limited heat exchanger, 5 yrs limited parts Residential use
  • 10-year limited heat exchanger, 5 yrs limited parts Commercial use
  • Energy Factor of 0.95 for Natural Gas
  • Maximum flow rate of 10.0 GPM at 35°F temperature rise (5.4 GPM at 70°F rise)
  • Primary heat exchanger utilizes HRS35 commercial-grade copper alloy for 25 times better heat transfer than stainless steel
  • Secondary heat exchanger utilizes 316L stainless steel for better corrosion resistance
  • NSF certified for commercial applications
  • 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
  • Includes remote control as standard feature
  • Venting with Schedule 40 PVC, CPVC, PP, Category III stainless steel
  • Safety features include freeze, overheat, surge protection, and troubleshooting diagnostic codes


  • Emissions: Ultra Low NOx
  • Maximum BTUs: 199,000
  • Minimum BTUs: 19,500
  • Water Connection Location: Bottom
  • Water Connection: 0.75"
  • Flow Rate: 10.00
  • Heat Exchanger: Copper & Stainless
  • Voltage: AC 120V
  • Energy Factor: 0.95
  • ENERGY STAR® Qualified: True
  • Remote Control: True
  • Technology: Condensing
  • Multilink: True
  • Height: 22.50"
  • Width: 17.75"
  • Depth: 10.75"
  • Product Weight: 59 lbs.
  • Vent Type: Direct Vent
  • Vent Size: 4"
Write your own product review

Product Reviews

This product hasn't received any reviews yet. Be the first to review this product!