Viessmann vs Worcester Bosch:Which is more popular?
In September 2026, Worcester Bosch had more branded searches than Viessmann among boiler brands in the United Kingdom. Worcester Bosch had about 14,800 branded searches, while Viessmann had 3,600. Worcester Bosch made up 33% of all boiler brand searches we track, and Viessmann accounted for 8%. When we asked ChatGPT and Google AI Overviews about boiler brands, Worcester Bosch appeared in all four answers and Viessmann in three. Worcester Bosch was mentioned before Viessmann in every answer.
Who do people search for more?
Worcester Bosch, about 4 searches for every 1 for Viessmann
Who does AI mention more?
Worcester Bosch, mentioned in every answer we collected
Who does AI recommend more?
Worcester Bosch, named ahead of Viessmann in every answer
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Top boiler brands in ChatGPT and Google AI Overviews
In three ChatGPT questions and one Google AI Overview, Worcester Bosch appeared in all four answers. Viessmann was mentioned in three out of four: in all three ChatGPT answers, but not in the Google AI Overview. Worcester Bosch was listed before Viessmann in every answer.
Most recommended by AI
Brands get a higher ranking if they are mentioned earlier in the answers.
- Worcester Bosch1st
Vaillant2nd
Viessmann3rd
Ideal4th
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
Asked ChatGPT
“Which boiler brand should I get in the UK?”
Asked ChatGPT
“What are the best boiler brands in the UK?”
Asked ChatGPT
“What's the most reliable combi boiler brand in the UK?”
Searched Google, AI Overview
“combi boiler”
Google showed no AI Overview for this search.
Searched Google, AI Overview
“new boiler”
Brands are shown in the order each answer named them. The survey took place in United Kingdom on October 22, 2026.
Is Viessmann or Worcester Bosch more popular in search?
This chart shows how often people search Google for Viessmann and Worcester Bosch by name. Each line represents a brand's share of searches for all five boiler brands we track, month by month, from searches in United Kingdom.
Share of searches by month for Worcester Bosch, Viessmann. The figures are in the table below the chart.
View monthly share of searches table
| Month | Worcester Bosch | Ideal | Vaillant | Baxi | Viessmann |
|---|---|---|---|---|---|
| Oct 2025 | 30.5% | 30.5% | 20.4% | 11.1% | 7.4% |
| Nov 2025 | 31.2% | 31.2% | 20.8% | 9.3% | 7.6% |
| Dec 2025 | 32.4% | 32.4% | 17.7% | 9.7% | 7.9% |
| Jan 2026 | 29.2% | 35.6% | 19.4% | 8.7% | 7.1% |
| Feb 2026 | 32.4% | 32.4% | 17.7% | 9.7% | 7.9% |
| Mar 2026 | 32.4% | 32.4% | 17.7% | 9.7% | 7.9% |
| Apr 2026 | 34.4% | 28.1% | 18.8% | 10.2% | 8.4% |
| May 2026 | 31.8% | 26% | 21.3% | 11.5% | 9.4% |
| Jun 2026 | 36.3% | 24.3% | 19.9% | 10.8% | 8.8% |
| Jul 2026 | 36% | 24.1% | 19.6% | 13.1% | 7.1% |
| Aug 2026 | 33.1% | 27% | 22.1% | 9.8% | 7.9% |
| Sep 2026 | 33% | 27% | 22.1% | 9.8% | 8% |
How has the Viessmann and Worcester Bosch comparison changed over the last 12 months?
3 findings
- Worcester Bosch was ahead of Viessmann in every measured month of the 12 months ending September 2026.
- Across the 12 months ending September 2026, Viessmann’s share of searches among boiler brands in the United Kingdom moved from 7.4% to 8%, and its estimated monthly branded searches moved from 5.4K to 3.6K.
- Across the 12 months ending September 2026, Worcester Bosch’s share of searches among boiler brands in the United Kingdom moved from 30.5% to 33%, and its estimated monthly branded searches moved from 22.2K to 14.8K.
How did search popularity change for United Kingdom boiler brands in September 2026?
2 changes
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.
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.
How are branded searches counted?
2 search terms
Brandwave collects information about searches that people make online using Viessmann’s and Worcester Bosch’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.
Viessmann
1 branded search term
- viessmann
Worcester Bosch
1 branded search term
- worcester bosch
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