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Brands

A.O. Smith Water HeatersPublished models, product lines, and brand coverage.Bradford White Water HeatersPublished models, product lines, and brand coverage.Navien Water HeatersPublished models, product lines, and brand coverage.Noritz Water HeatersPublished models, product lines, and brand coverage.Rheem Water HeatersPublished models, product lines, and brand coverage.Rinnai Water HeatersPublished models, product lines, and brand coverage.Takagi Water HeatersPublished models, product lines, and brand coverage.
Home / Takagi
Brand

Takagi

Reliable Japanese-made tankless units with commercial-grade build quality.
Takagi, founded 1946, headquartered in Irvine, California. 1 models across 1 product types: 1 condensing tankless. All condensing tankless models

Why buyers end up in Takagi

  • Specialist: focused entirely on condensing tankless technology
  • Pro-channel focused: typically installed by contractors, not sold retail

Where this brand is weaker

  • No published Wi-Fi or smart connectivity
  • No heat pump or gas tank models in our database

Market position

Japanese-engineered tankless specialist with 70+ years of water heater manufacturing heritage. Backed by A.O. Smith distribution network.

Parent company: Purpose Co., Ltd. (formerly Takagi Industrial Co., Ltd., renamed 2011). Joint venture with A.O. Smith Corporation for North American operations since 2010.

Known for: Reliable Japanese-made tankless units with commercial-grade build quality. Quieter niche brand favored by experienced contractors. Over 70 years in the water heater business.

Below are all verified Takagi models with published specs.

Models

Condensing Tankless Models

ModelBrandUEFMax GPMBTU InputEst. Cost/yr
T-H3J-OS-N-1Takagi0.954.7160,000~$242
Beyond specs, here's the ownership experience with Takagi.

Where to buy

Channels: Wholesale, Contractor

Sold exclusively through plumbing wholesalers and contractors. A.O. Smith joint venture handles North American marketing and distribution.

Technology

  • condensing tankless technology
  • commercial-grade copper heat exchangers
  • 316L stainless steel secondary heat exchangers
  • Easy-Link connectivity
  • Multi-Link cascade (up to 20 units)

Product lines

Residential Condensing

T-H3 Series High-efficiency condensing tankless, 199,000 BTU, PVC venting, commercial-grade copper primary heat exchanger with 316L stainless steel secondary
T-H3M Mid-range condensing model
T-H3S Standard condensing model
T-H3J Condensing model variant

Residential Non Condensing

T-D2 Series Non-condensing tankless water heater

Commercial

TK-540 High-capacity commercial tankless
TK-240 Commercial tankless

Warranty

Residential models 12-year heat exchanger, 5-year parts
Commercial models 5-year heat exchanger, 5-year parts

12-year heat exchanger is solid but trails Navien (15-year) and Noritz EZ (25-year) in the condensing tankless category

Related
Sources. Company websites, ENERGY STAR, manufacturer spec sheets.Methodology