T-H3M-OS-P Outdoor Tankless High Efficiency Condensing Water Heater (LP)

The Takagi brand has been discontinued by the manufacturer as of December 31, 2025. Suggested replacement units will be available on our website and replacement parts will continue to be available as supplies last. If you'd like any further assistance, please contact our customer service team.

Rebate
Think Green, Save Green. Rebate and incentive programs provide cash-back to consumers for the purchase of appliances that meet certain energy efficiency standards. Most states are offering rebates in the $50 to $250 range. You can search for rebates in your area from here.

The T-H3M is a new breed of tankless for smaller spaces. This model also uses existing 1/2" gas supply lines and inexpensive PVC venting to lower installation costs.

The T-H3M supplies hot water to domestic hot water systems (directly or indirectly) which can be used with storage tanks, recirculation systems, and/or domestic & heating applications.

The T-H3M is a high efficient, condensing tankless water heater perfect for residential applications. With gas inputs of 120,000 BTU, the T-H3M can produce enough hot water for two bathrooms in warmer climates or 1.5 baths in colder climates.

This unit is NOT approved for installation in Manufacture Homes and is not suitable for space heating applications only

ENERGY STAR® qualified

15-year limited heat exchanger, 5 yrs limited parts Residential use

Energy Factor of 0.93 for Liquid Propane

Maximum flow rate of 6.6 GPM at 35°F temperature rise (4.3 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

Complies with Ultra-Low NOx regulations of less than 14 ng/J (<20ppm)

Integrated controls and power cord as standard features

Venting with Schedule 40 PVC, CPVC, PP, Category III stainless steel

Safety features include freeze, overheat, surge protection, and troubleshooting diagnostic codes