• Takagi Condensing Outdoor Tankless Water Heater - Liquid Propane - T-H3S-OS-P

    - 180000 Btu - Energy Factor 0.95

    Product ID • TH3SOSP00000

    Non-Stock Item - Allow 5-15 Business Days to Ship

  • $969.75
  • Quantity:
  • Free Ground Shipping


The T-H3S-OS-P is a high efficient, condensing, tankless water heater perfect for residential applications. With gas inputs of 180,000 BTU, the T-H3S-OS-P can produce enough hot water for three bathrooms in warmer climates or two baths in colder climates.

Available for indoor and outdoor installation, the T-H3S-OS-P 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.

Return Policy | Shipping Policy

Manuals & Docs

Technical Specs

Takagi Condensing Outdoor Tankless Water Heater T-H3S-OS-P Specs

  • Natural Gas Input
    Min. 15,000Btu - Max. 180,000Btu
  • LPG Input
    Min. 13,000Btu - Max. 180,000Btu
  • Gas Connection
    3/4 inch NPT
  • Water Connection
    3/4 inch NPT
  • Natural Gas Pressure Inlet
    Min. 5.0 inch W.C.
  • LP Gas Pressure Inlet
    Min. 8.0 inch W.C.
  • Weight
    58 lbs
  • Dimensions
    22-1/2 inch H x 17-3/4 inch W x 10-3/4 inch D
  • Ignition
    Electronic ignition
  • Electrical Supply
    AC 120C (60 Hz)
  • Water Pressure
    Min. 15 psi - Max. 150 psi
  • Natural Manifold Pressure
    2.0-2.5 inch W.C.
  • LP Manifold Pressure
    3.7-4.5 inch W.C.

Takagi Condensing Indoor Tankless Water Heater T-H3S-OS-P Features

  • Maximum flow rate of 8.0 GPM at 35°F temperature rise (4.9 GPM at 70°F rise)
  • Energy Factor of 0.95 for NG and LPG
  • 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
  • ENERGY STAR® qualified
  • Complies with Ultra-Low NOx regulations of less than 14 ng/J (<20ppm)
  • Indoor model has integrated controls and power cord as standard features
  • Outdoor model 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

Info & Links