Outdoor Tankless Water Heater, Natural Gas, 180K BTU

Discontinued Outdoor Tankless Water Heater, Natural Gas, 180K BTU

The T-H3S-OS-NG from Takagi is an Outdoor Tankless Water Heater, Natural Gas, 180K BTU. 


  • Continuous Maximum Flow Rates Up to 10.0 GPM;

Durable Heat Exchanger:

  • Primary Heat Exchanger is constructed of HRS35 Commercial-Grade Copper
  • Secondary Heat Exchanger is made of Type 316L Stainless Steel
  • Energy Star Qualified;


  • Air-Fuel Ratio (AFR) Sensor
  • Exhaust & Water Temperature Safety Control
  • Overheat Cut-Off Fuse
  • Electronic Ignition - No Pilot Light;
  • Internal Freeze-Protection System;
  • Includes a Wall Mount Temperature Remote Controller and Advanced Diagnostic to Simplify Troubleshooting;
  • Complies With Lead Free Standards;
  • Internal Freeze Protection System;

Power Direct Vent Design:

  • Exhaust, 3" PVC Venting up to 70 Feet or 4" PVC Venting up to 100 Feet
  • Provides flexible venting with PVC, CPVC, or ABS Pipe for Intake and Exhaust (solid core only). Canadian Installations Require ULCS636 Listed PVC or CPVC Pipe for Venting.
  • Category IV Stainless Steel venting can also be used
  • Ultra-Low NOx Condensing Technology.

Technical Specifications:

  • NG Input Min. 15,000BTU/h Max. 180,000BTU/h;
  • Water Pressure Min. 15psi Max. 150psi;
  • T-H3OS Manifold Pressure Natural: 2.1"WC Propane: 2.55"WC;
  • Gas Connection 3/4" NPT;
  • Water Connection 3/4" NPT;
  • NG Gas Pressure Inlet Min. 5.0"WC Max. 10.5"WC;
  • Weight 58lbs;
  • Dimensions 22.4" x 17.7" x 10.7";
  • Ignition Electronic Ignition;
  • Electrical Supply AC 120V (60 Hz).

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  • Views: 7185
  • Outdoor Tankless Water Heater, Natural Gas, 180K BTU QR Code
  • Model: T-H3S-OS-NG
  • MPN: T-H3S-OS-NG
  • Availability: Discontinued
  • $ 0.00


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Tags: Water Heaters, Plumbing Supply, PEX, Pipe Fittings, Residential Plumbing