Brandwave

Rinnai vs Stiebel Eltron:Which is more popular?

In September 2026, Stiebel Eltron had more branded searches than Rinnai among panel heater brands worldwide. Stiebel Eltron had about 74,000 branded searches, while Rinnai had 60,500. Stiebel Eltron made up 8.7% of all panel heater brand searches we track, and Rinnai accounted for 7.2%. When we asked ChatGPT and Google AI Overviews about panel heater brands, Stiebel Eltron appeared in two of the five answers and Rinnai in none.

Among panel heater brands worldwide in September 2026

Who do people search for more?

Stiebel Eltron, about 22% more searches than Rinnai

Stiebel Eltron 74K searchesRinnai 60.5K searches

Who does AI mention more?

Stiebel Eltron, mentioned in 2 of 5 answers, Rinnai in 0

Stiebel Eltron in 2 of 5Rinnai in 0 of 5

Who does AI recommend more?

Stiebel Eltron, the only one of the two named

Stiebel Eltron first in 2Rinnai never named

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Top panel heater brands in ChatGPT and Google AI Overviews

In three ChatGPT questions and two Google AI Overviews, Stiebel Eltron was mentioned in two out of five: in two of the three ChatGPT answers, but not in either of the two Google AI Overviews. Rinnai 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. De'Longhi1st
  2. Stiebel Eltron2nd
  3. Dimplex3rd
  4. ENVI4th
  5. Rinnai–
  6. Goldair–

Mentioned by AI

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

  • De'Longhi4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Stiebel Eltron2 of 5Named in 2 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Dimplex1 of 5Named in 1 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • ENVI1 of 5Named in 1 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Rinnai0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Goldair0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers

See every answer about panel heater brands

5 answers

  • Asked ChatGPT

    “Which panel heater brand should I go to?”

    1. 1Stiebel Eltron
    2. 2De'Longhi
    3. 3ENVI

  • Asked ChatGPT

    “What are the best panel heater brands?”

    1. 1Stiebel Eltron
    2. 2De'Longhi

  • Asked ChatGPT

    “What's the best panel heater brand for a small room?”

    1. 1De'Longhi
    2. 2Dimplex

  • Searched Google, AI Overview

    “best panel heater”

    1. 1De'Longhi

  • Searched Google, AI Overview

    “panel heater for bedroom”

    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 21, 2026.

    Is Rinnai or Stiebel Eltron more popular in search?

    This chart shows how often people search Google for Rinnai and Stiebel Eltron by name. Each line represents a brand's share of searches for all six panel heater brands we track, month by month, from English-language searches worldwide.

    Rinnai and Stiebel Eltron among panel heater brands worldwide, by month

    Share of searches by month for Stiebel Eltron, Rinnai. The figures are in the table below the chart.

    View monthly share of searches table
    MonthDe'LonghiStiebel EltronRinnaiDimplexGoldairENVI
    Oct 202578.3%8.6%7%5.1%0.63%0.42%
    Nov 202583.4%6.2%5.1%4.6%0.45%0.37%
    Dec 202582.6%6.1%6.1%4.2%0.55%0.46%
    Jan 202675.1%10%8.3%5.3%0.74%0.52%
    Feb 202675.8%10.2%8.3%4.6%0.74%0.34%
    Mar 202676.5%10.3%8.4%3.8%0.75%0.21%
    Apr 202678.4%8.6%8.6%3.4%0.77%0.22%
    May 202678.4%8.6%8.6%3.4%0.77%0.27%
    Jun 202678.1%8.6%8.6%3.9%0.77%0.14%
    Jul 202679.4%8.7%7.1%3.7%0.96%0.12%
    Aug 202678.8%8.7%8.7%3%0.77%0.12%
    Sep 202679.5%8.7%7.2%3.6%0.64%0.29%

    How has the Rinnai and Stiebel Eltron comparison changed over the last 12 months?

    3 findings
    • Stiebel Eltron was ahead of Rinnai in every measured month of the 12 months ending September 2026.
    • Across the 12 months ending September 2026, Rinnai’s share of searches among panel heater brands worldwide moved from 7% to 7.2%, and its estimated monthly branded searches moved from 74K to 60.5K.
    • Across the 12 months ending September 2026, Stiebel Eltron’s share of searches among panel heater brands worldwide moved from 8.6% to 8.7%, and its estimated monthly branded searches moved from 90.5K to 74K.

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

    2 changes

    1. In September 2026, Rinnai lost share of searches among panel heater brands worldwide, from 8.7% to 7.2%.

    2. In September 2026, Stiebel Eltron rose from 3rd to 2nd among panel heater brands worldwide.

    How are branded searches counted?

    2 search terms

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

    Rinnai

    1 branded search term

    • rinnai

    Stiebel Eltron

    1 branded search term

    • stiebel eltron

    How the Brand Demand Index is measured

    Other head-to-heads among panel heater brands

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