Brandwave

How popular isRheem?

In September 2026, people searched for Rheem by name about 130,000 times worldwide, a 30.5% decrease from the previous year. These searches made up 15.3% of all global tankless water heater brand searches, placing Rheem second out of six brands. When we asked both ChatGPT and Google AI Overviews about tankless water heater brands, Rheem appeared in three of the five answers and was the third most recommended of the six.

Search and AI answers in September 2026

Rheem is the second most searched of 6 competitors and the third most recommended in AI answers.

  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, Rheem was mentioned in three out of five: in two of the three ChatGPT answers and in one of the two Google AI Overviews. Rheem is the third most recommended of the six.

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 Rheem?

      Rheem 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 Rheem and its closest rivals

      Every comparison with Rheem

      9 comparisons

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

      3 findings
      • Across the 12 months ending September 2026, estimated monthly branded searches for Rheem worldwide fell from 187K to 130K.
      • Across the 12 months ending September 2026, Rheem’s share of searches among tankless water heater brands worldwide decreased from 20.5% to 15.3%.
      • Across the 12 months ending September 2026, Rheem’s share of searches among tankless water heater brands worldwide peaked at 35.7% in May 2026 and was lowest at 15.3% in September 2026.

      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 Rheem’s branded searches counted?

      6 search terms

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

      • rheem
      • rheem gas water heater
      • rheem hot water
      • rheem tankless
      • rheem tankless water heater
      • rheem water heater

      Do you work for Rheem? To request corrections or removal please contact us via our support page and we will be happy to assist.

      How the Brand Demand Index is measured

      Where does Rheem compete?

      Rheem is ranked in three competitor sets. Each share is worked out among that set's brands, so it differs from set to set.
      Competitor setRankShare of searchesRanking
      Heat pump water heating brands3rd of 524.8%Show ranking
      Gas water heater brands1st of 444.8%Show ranking
      Tankless water heater brands2nd of 615.3%Shown above
      Creator with pink hair and a pink jacket

      Is Rheem your brand?

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