Brandwave

How popular isTakagi?

In September 2026, people searched for Takagi by name about 1,900 times worldwide, a 34.5% decrease from the previous year. These searches made up 2.4% of all global tankless water heater brand searches, placing Takagi fourth out of six brands. When we asked both ChatGPT and Google AI Overviews about tankless water heater brands, Takagi did not appear in any of the answers.

Search and AI answers in September 2026

Takagi is the fourth most searched of 6 competitors and not listed in any AI answer.

  1. NavienShare of searches 72.9%Mentioned in 3 of 5 AI answersPlace in AI recommendations 2nd
  2. RheemShare of searches 15.3%Mentioned in 3 of 5 AI answersPlace in AI recommendations 3rd
  3. NoritzShare of searches 6.8%Mentioned in 1 of 5 AI answersPlace in AI recommendations 4th
  4. TakagiShare of searches 2.4%Mentioned in 0 of 5 AI answersPlace in AI recommendations –
  5. RinnaiShare of searches 2%Mentioned in 3 of 5 AI answersPlace in AI recommendations 1st

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Top tankless water heater brands in ChatGPT and Google AI Overviews

In three ChatGPT questions and two Google AI Overviews, Takagi did not appear in any of the five answers.

Most recommended by AI

Brands get a higher ranking if they are mentioned earlier in the answers.

  1. Rinnai1st
  2. Navien2nd
  3. Rheem3rd
  4. Noritz4th
  5. Takagi–
  6. EcoSmart–

Mentioned by AI

Each dot is one answer, filled in when that answer mentions the brand.

  • Navien3 of 5Named in 2 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Rheem3 of 5Named in 2 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Rinnai3 of 5Named in 2 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Noritz1 of 5Named in 1 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Takagi0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • EcoSmart0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers

See every answer about tankless water heater brands

5 answers

  • Asked ChatGPT

    “What's the best tankless water heater?”

    1. 1Rinnai
    2. 2Navien
    3. 3Rheem

  • Asked ChatGPT

    “Which tankless water heater brand is most reliable?”

    1. 1Rinnai
    2. 2Noritz
    3. 3Navien
    4. 4Rheem

  • Asked ChatGPT

    “Should I get a gas or electric tankless water heater?”

    1. Searched Google, AI Overview

      “tankless water heater”

      1. Searched Google, AI Overview

        “best tankless water heater”

        1. 1Rinnai
        2. 2Navien
        3. 3Rheem

      Not named in any answer:

      Brands are shown in the order each answer named them. The survey took place in the United States on October 27, 2026.

      Which tankless water heater brands compete with Takagi?

      Takagi against tankless water heater brands worldwide, by month

      Share of searches by month for Navien, Rheem, Noritz, Takagi, Rinnai. The figures are in the table below the chart.

      View monthly share of searches table
      MonthNavienRheemNoritzTakagiRinnaiEcoSmart
      Oct 202568.8%20.5%6.1%2.7%1.5%0.54%
      Nov 202571.1%17.4%6.3%2.8%1.5%0.84%
      Dec 202564.1%23.4%7%3.1%1.6%0.76%
      Jan 202664.4%24.9%6.1%2.7%1.4%0.54%
      Feb 202668.7%20.4%6.1%2.7%1.7%0.36%
      Mar 202667.4%22.6%5.5%2.4%1.6%0.49%
      Apr 202658.6%31.8%5.2%2.3%1.5%0.57%
      May 202653.7%35.7%5.8%2.6%1.7%0.52%
      Jun 202667.4%20%7.3%2.6%2.2%0.53%
      Jul 202667.2%21.3%6.3%2.8%1.9%0.46%
      Aug 202667.2%20%7.3%2.6%2.2%0.8%
      Sep 202672.9%15.3%6.8%2.4%2%0.61%

      1. 1.Navien

        72.9%

        Held 1st. 57.7K estimated branded searches, +15.9% vs prior month. Share +5.7 points.

      2. 2.Rheem

        15.3%

        Held 2nd. 12.1K estimated branded searches, -18.2% vs prior month. Share -4.7 points.

      3. 3.Noritz

        6.8%

        Held 3rd. 5.4K estimated branded searches, 0% vs prior month. Share -0.5 points.

      4. 4.Takagi

        2.4%

        Held 4th. 1.9K estimated branded searches, 0% vs prior month. Share -0.2 points.

      5. 5.Rinnai

        2%

        Held 5th. 1.6K estimated branded searches, 0% vs prior month. Share -0.1 points.

      6. 6.EcoSmart

        0.61%

        Held 6th. 480 estimated branded searches, -18.6% vs prior month. Share -0.2 points.

      Rheem and Rinnai sell other things too, so only their searches that name this product count here, like “rheem tankless”.

      Compare popularity between Takagi and its closest rivals

      Every comparison with Takagi

      5 comparisons

      How has branded search demand for Takagi changed worldwide over the last 12 months?

      2 findings
      • Across the 12 months ending September 2026, estimated monthly branded searches for Takagi worldwide fell from 2.9K to 1.9K.
      • Across the 12 months ending September 2026, Takagi’s share of searches among tankless water heater brands worldwide held steady, from 2.7% to 2.4%.

      How did search popularity change for tankless water heater brands worldwide in September 2026?

      5 changes

      1. In September 2026, Navien gained share of searches among tankless water heater brands worldwide, from 67.2% to 72.9%.

      2. In September 2026, Rheem lost share of searches among tankless water heater brands worldwide, from 20% to 15.3%.

      3. Estimated monthly branded searches for Takagi worldwide fell 34.5% over 12 measured months, from 2.9K to 1.9K in September 2026.

      4. Estimated monthly branded searches for EcoSmart worldwide fell 18.6% over 12 measured months, from 590 to 480 in September 2026.

      5. Estimated monthly branded searches for Noritz worldwide fell 18.2% over 12 measured months, from 6.6K to 5.4K in September 2026.

      How are Takagi’s branded searches counted?

      1 search term

      Brandwave collects information about searches that people make online using Takagi’s name. When viewed over time, estimated search volumes for this branded term can be used to understand whether interest in the brand is growing, holding steady, or fading.

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      How the Brand Demand Index is measured

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