Stiebel Eltron vs Thermann:Which is more popular?
In September 2026, Stiebel Eltron had more branded searches than Thermann among hot water system brands in Australia. Stiebel Eltron had about 1,900 branded searches, while Thermann had 480. Stiebel Eltron made up 10.1% of all hot water system brand searches we track, and Thermann accounted for 2.5%. When we asked ChatGPT and Google AI Overviews about hot water system brands, Stiebel Eltron appeared in one of the five answers and Thermann in none.
Who do people search for more?
Stiebel Eltron, about 4 searches for every 1 for Thermann
Who does AI mention more?
Stiebel Eltron, mentioned in 1 of 5 answers, Thermann in 0
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Top hot water system brands in ChatGPT and Google AI Overviews
In three ChatGPT questions and two Google AI Overviews, Stiebel Eltron was mentioned in one out of five: not in any of the three ChatGPT answers, but in one of the two Google AI Overviews. Thermann 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.
iStore1st
Rheem2nd
Reclaim Energy3rd- Dux4th
Rinnai5th- Stiebel Eltron6th
Aquamax–- SandenTherm–
Thermann–
Apricus–
Mentioned by AI
Each dot is one answer, filled in when that answer mentions the brand.
- Rheem4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- iStore4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- Reclaim Energy2 of 5Named in 2 of 3 ChatGPT answersNamed in 0 of 2 Google answers
- Rinnai2 of 5Named in 1 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- Dux1 of 5Named in 0 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- Stiebel Eltron1 of 5Named in 0 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- Aquamax0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
- SandenTherm0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
- Thermann0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
- Apricus0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
See every answer about hot water system brands
5 answers
Asked ChatGPT
“What's the best hot water system in Australia?”
Asked ChatGPT
“Which heat pump hot water system should I buy?”
Asked ChatGPT
“Is gas or electric hot water better, and which brand?”
Searched Google, AI Overview
“hot water system”
Searched Google, AI Overview
“heat pump hot water”
Not named in any answer:
Brands are shown in the order each answer named them. The survey took place in Australia on October 27, 2026.
Is Stiebel Eltron or Thermann more popular in search?
This chart shows how often people search Google for Stiebel Eltron and Thermann by name. Each line represents a brand's share of searches for all ten hot water system brands we track, month by month, from searches in Australia.
Share of searches by month for Stiebel Eltron, Thermann. The figures are in the table below the chart.
View monthly share of searches table
| Month | Rheem | Dux | iStore | Reclaim Energy | Aquamax | Stiebel Eltron | Rinnai | SandenTherm | Thermann | Apricus |
|---|---|---|---|---|---|---|---|---|---|---|
| Oct 2025 | 20.9% | 19.2% | 12.1% | 10.4% | 1.1% | 7.9% | 10% | 3.7% | 2.5% | 12.1% |
| Nov 2025 | 21.5% | 19.8% | 10.3% | 10.7% | 0.91% | 8.2% | 10.3% | 3.1% | 2.5% | 12.5% |
| Dec 2025 | 17.3% | 31.8% | 8.1% | 7.2% | 0.89% | 6.8% | 8.1% | 2.5% | 2% | 15.3% |
| Jan 2026 | 18.9% | 18.1% | 8.8% | 10.1% | 1.5% | 7.4% | 8.8% | 3.3% | 2.7% | 20.4% |
| Feb 2026 | 20.5% | 18.5% | 11.7% | 10.7% | 1.6% | 7.8% | 9.3% | 3.5% | 2.3% | 14.2% |
| Mar 2026 | 22.5% | 15.3% | 13.1% | 11.2% | 1.8% | 8.6% | 8.6% | 3.2% | 2.7% | 13.1% |
| Apr 2026 | 23.4% | 15.9% | 13.6% | 11.1% | 1.5% | 7.5% | 8.9% | 4.1% | 2.8% | 11.2% |
| May 2026 | 28.8% | 18.4% | 11.3% | 11.7% | 1.5% | 9% | 9% | 4.1% | 2.8% | 3.4% |
| Jun 2026 | 27.3% | 16.9% | 12.9% | 13.3% | 1.7% | 10.7% | 8.5% | 3.9% | 2.6% | 2.1% |
| Jul 2026 | 26.3% | 16.8% | 14.9% | 12.8% | 2% | 9.8% | 8.2% | 3.7% | 3% | 2.5% |
| Aug 2026 | 24.5% | 18.1% | 17.2% | 14.3% | 1.9% | 9.1% | 6.2% | 3.4% | 2.8% | 2.3% |
| Sep 2026 | 22.3% | 20.7% | 12.7% | 11% | 10.1% | 10.1% | 5.3% | 3.1% | 2.5% | 2.1% |
How has the Stiebel Eltron and Thermann comparison changed over the last 12 months?
3 findings
- Stiebel Eltron was ahead of Thermann in every measured month of the 12 months ending September 2026.
- Across the 12 months ending September 2026, Stiebel Eltron’s share of searches among hot water system brands in Australia moved from 7.9% to 10.1%, and its estimated monthly branded searches held steady at 1.9K.
- Across the 12 months ending September 2026, Thermann’s share of searches among hot water system brands in Australia held steady at 2.5%, and its estimated monthly branded searches moved from 590 to 480.
How did search popularity change for Australia hot water system brands in September 2026?
3 changes
In September 2026, Aquamax overtook Stiebel Eltron and 4 others to rank 5th among hot water system brands in Australia, with 10.1% of the searches.
In September 2026, Stiebel Eltron gained share of searches among hot water system brands in Australia, from 9.1% to 10.1%.
Estimated monthly branded searches for Thermann in Australia fell 18.6% over 12 measured months, from 590 to 480 in September 2026.
How are branded searches counted?
2 search terms
Brandwave collects information about searches that people make online using Stiebel Eltron’s and Thermann’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.
Stiebel Eltron
1 branded search term
- stiebel eltron hot water
Thermann
1 branded search term
- thermann
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