Brandwave

How popular isViessmann?

In September 2026, people searched for Viessmann by name about 3,600 times in the United Kingdom, a 33.3% decrease from the previous year. These searches made up 8% of all United Kingdom boiler brand searches, placing Viessmann fifth out of five brands. When we asked both ChatGPT and Google AI Overviews about boiler brands, Viessmann appeared in three of the four answers and was the third most recommended of the five.

Search and AI answers in September 2026

Viessmann is the fifth most searched of 5 competitors and the third most recommended in AI answers.

  1. Worcester BoschShare of searches 33%Mentioned in 4 of 4 AI answersPlace in AI recommendations 1st
  2. IdealShare of searches 27%Mentioned in 3 of 4 AI answersPlace in AI recommendations 4th
  3. VaillantShare of searches 22.1%Mentioned in 4 of 4 AI answersPlace in AI recommendations 2nd
  4. BaxiShare of searches 9.8%Mentioned in 1 of 4 AI answersPlace in AI recommendations 5th
  5. ViessmannShare of searches 8%Mentioned in 3 of 4 AI answersPlace in AI recommendations 3rd
Viessmann website (opens in a new tab)

Follow Viessmann and get free monthly updates on what changed

By continuing you'll get index updates and occasional product news from Brandwave. Unsubscribe any time. Privacy

Top boiler brands in ChatGPT and Google AI Overviews

In three ChatGPT questions and one Google AI Overview, Viessmann was mentioned in three out of four: in all three ChatGPT answers, but not in the Google AI Overview. Viessmann is the third most recommended of the five.

Most recommended by AI

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

  1. Worcester Bosch1st
  2. Vaillant2nd
  3. Viessmann3rd
  4. Ideal4th
  5. Baxi5th

Mentioned by AI

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

  • Worcester Bosch4 of 4Named in 3 of 3 ChatGPT answersNamed in 1 of 1 Google answers
  • Vaillant4 of 4Named in 3 of 3 ChatGPT answersNamed in 1 of 1 Google answers
  • Ideal3 of 4Named in 3 of 3 ChatGPT answersNamed in 0 of 1 Google answers
  • Viessmann3 of 4Named in 3 of 3 ChatGPT answersNamed in 0 of 1 Google answers
  • Baxi1 of 4Named in 1 of 3 ChatGPT answersNamed in 0 of 1 Google answers

See every answer about boiler brands

4 answers

Brands are shown in the order each answer named them. The survey took place in United Kingdom on October 22, 2026.

Which boiler brands compete with Viessmann?

Viessmann against boiler brands in the United Kingdom, by month

Share of searches by month for Worcester Bosch, Ideal, Vaillant, Baxi, Viessmann. The figures are in the table below the chart.

View monthly share of searches table
MonthWorcester BoschIdealVaillantBaxiViessmann
Oct 202530.5%30.5%20.4%11.1%7.4%
Nov 202531.2%31.2%20.8%9.3%7.6%
Dec 202532.4%32.4%17.7%9.7%7.9%
Jan 202629.2%35.6%19.4%8.7%7.1%
Feb 202632.4%32.4%17.7%9.7%7.9%
Mar 202632.4%32.4%17.7%9.7%7.9%
Apr 202634.4%28.1%18.8%10.2%8.4%
May 202631.8%26%21.3%11.5%9.4%
Jun 202636.3%24.3%19.9%10.8%8.8%
Jul 202636%24.1%19.6%13.1%7.1%
Aug 202633.1%27%22.1%9.8%7.9%
Sep 202633%27%22.1%9.8%8%

  1. 1.Worcester Bosch

    33%

    Held 1st. 14.8K estimated branded searches, +22.3% vs prior month. Share 0 points.

  2. 2.Ideal

    27%

    Held 2nd. 12.1K estimated branded searches, +22.2% vs prior month. Share 0 points.

  3. 3.Vaillant

    22.1%

    Held 3rd. 9.9K estimated branded searches, +22.2% vs prior month. Share 0 points.

  4. 4.Baxi

    9.8%

    Held 4th. 4.4K estimated branded searches, +22.2% vs prior month. Share 0 points.

  5. 5.Viessmann

    8%

    Held 5th. 3.6K estimated branded searches, +24.1% vs prior month. Share +0.1 points.

Compare popularity between Viessmann and its closest rivals

Every comparison with Viessmann

4 comparisons

How has branded search demand for Viessmann changed in the United Kingdom over the last 12 months?

3 findings
  • Across the 12 months ending September 2026, estimated monthly branded searches for Viessmann in the United Kingdom fell from 5.4K to 3.6K.
  • Across the 12 months ending September 2026, Viessmann’s share of searches among boiler brands in the United Kingdom increased from 7.4% to 8%.
  • Across the 12 months ending September 2026, Viessmann’s share of searches among boiler brands in the United Kingdom peaked at 9.4% in May 2026 and was lowest at 7.1% in January 2026.

How did search popularity change for United Kingdom boiler brands in September 2026?

5 changes

  1. Worcester Bosch’s share of searches among boiler brands in the United Kingdom has lost ground for 3 months in a row, from 36.3% to 33% in September 2026.

  2. Estimated monthly branded searches for Baxi in the United Kingdom fell 45.7% over 12 measured months, from 8.1K to 4.4K in September 2026.

  3. Estimated monthly branded searches for Ideal in the United Kingdom fell 45.5% over 12 measured months, from 22.2K to 12.1K in September 2026.

  4. Estimated monthly branded searches for Viessmann in the United Kingdom fell 33.3% over 12 measured months, from 5.4K to 3.6K in September 2026.

  5. Estimated monthly branded searches for Vaillant in the United Kingdom fell 33.1% over 12 measured months, from 14.8K to 9.9K in September 2026.

How are Viessmann’s branded searches counted?

1 search term

Brandwave collects information about searches that people make online using Viessmann’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.

  • viessmann

Do you work for Viessmann? 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

Creator with pink hair and a pink jacket

Is Viessmann your brand?

Put your own campaigns, spend and outcomes next to this demand line, so you can see which of your marketing lined up with the movements above.

Start free