Brandwave

iStore vs Stiebel Eltron:Which is more popular?

In September 2026, iStore had more branded searches than Stiebel Eltron among hot water system brands in Australia. iStore had about 2,400 branded searches, while Stiebel Eltron had 1,900. iStore made up 12.7% of all hot water system brand searches we track, and Stiebel Eltron accounted for 10.1%. When we asked ChatGPT and Google AI Overviews about hot water system brands, iStore appeared in four of the five answers and Stiebel Eltron in one. iStore was mentioned before Stiebel Eltron in every answer that named either.

Among hot water system brands in Australia in September 2026

Who do people search for more?

iStore, about 26% more searches than Stiebel Eltron

iStore 2.4K searchesStiebel Eltron 1.9K searches

Who does AI mention more?

iStore, mentioned in 4 of 5 answers, Stiebel Eltron in 1

iStore in 4 of 5Stiebel Eltron in 1 of 5

Who does AI recommend more?

iStore, named ahead of Stiebel Eltron in 4 of 4 answers

iStore first in 4Stiebel Eltron never first

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Top hot water system brands in ChatGPT and Google AI Overviews

In three ChatGPT questions and two Google AI Overviews, iStore was mentioned in four out of five: in all three ChatGPT answers and in one of the 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. iStore was listed before Stiebel Eltron in every answer that named either.

Most recommended by AI

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

  1. iStore1st
  2. Rheem2nd
  3. Reclaim Energy3rd
  4. Dux4th
  5. Rinnai5th
  6. Stiebel Eltron6th
  7. Aquamax–
  8. SandenTherm–
  9. Thermann–
  10. 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

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 iStore or Stiebel Eltron more popular in search?

This chart shows how often people search Google for iStore and Stiebel Eltron 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.

iStore and Stiebel Eltron among hot water system brands in Australia, by month

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

View monthly share of searches table
MonthRheemDuxiStoreReclaim EnergyAquamaxStiebel EltronRinnaiSandenThermThermannApricus
Oct 202520.9%19.2%12.1%10.4%1.1%7.9%10%3.7%2.5%12.1%
Nov 202521.5%19.8%10.3%10.7%0.91%8.2%10.3%3.1%2.5%12.5%
Dec 202517.3%31.8%8.1%7.2%0.89%6.8%8.1%2.5%2%15.3%
Jan 202618.9%18.1%8.8%10.1%1.5%7.4%8.8%3.3%2.7%20.4%
Feb 202620.5%18.5%11.7%10.7%1.6%7.8%9.3%3.5%2.3%14.2%
Mar 202622.5%15.3%13.1%11.2%1.8%8.6%8.6%3.2%2.7%13.1%
Apr 202623.4%15.9%13.6%11.1%1.5%7.5%8.9%4.1%2.8%11.2%
May 202628.8%18.4%11.3%11.7%1.5%9%9%4.1%2.8%3.4%
Jun 202627.3%16.9%12.9%13.3%1.7%10.7%8.5%3.9%2.6%2.1%
Jul 202626.3%16.8%14.9%12.8%2%9.8%8.2%3.7%3%2.5%
Aug 202624.5%18.1%17.2%14.3%1.9%9.1%6.2%3.4%2.8%2.3%
Sep 202622.3%20.7%12.7%11%10.1%10.1%5.3%3.1%2.5%2.1%

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

3 findings

How did search popularity change for Australia hot water system brands in September 2026?

3 changes

  1. 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.

  2. In September 2026, Stiebel Eltron gained share of searches among hot water system brands in Australia, from 9.1% to 10.1%.

  3. In September 2026, iStore lost share of searches among hot water system brands in Australia, from 17.2% to 12.7%.

How are branded searches counted?

2 search terms

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

iStore

1 branded search term

  • istore heat pump

Stiebel Eltron

1 branded search term

  • stiebel eltron hot water

How the Brand Demand Index is measured

Other head-to-heads among hot water system brands

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