Brandwave

How popular isiStore?

In September 2026, people searched for iStore by name about 2,400 times in Australia, a 17.2% decrease from the previous year. These searches made up 12.7% of all Australia hot water system brand searches, placing iStore third out of ten brands. When we asked both ChatGPT and Google AI Overviews about hot water system brands, iStore appeared in four of the five answers and was the most recommended of the ten.

Search and AI answers in September 2026

iStore is the third most searched of 10 competitors and the most recommended in AI answers.

  1. RheemShare of searches 22.3%Mentioned in 4 of 5 AI answersPlace in AI recommendations 2nd
  2. DuxShare of searches 20.7%Mentioned in 1 of 5 AI answersPlace in AI recommendations 4th
  3. iStoreShare of searches 12.7%Mentioned in 4 of 5 AI answersPlace in AI recommendations 1st
  4. Reclaim EnergyShare of searches 11%Mentioned in 2 of 5 AI answersPlace in AI recommendations 3rd
  5. AquamaxShare of searches 10.1%Mentioned in 0 of 5 AI answersPlace in AI recommendations –

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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. iStore is the most recommended of the ten.

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.

Which hot water system brands compete with iStore?

iStore against hot water system brands in Australia, by month

Share of searches by month for Rheem, Dux, iStore, Reclaim Energy, Aquamax, Stiebel Eltron, Rinnai, SandenTherm, Thermann, Apricus. 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%

  1. 1.Rheem

    22.3%

    Held 1st. 4.2K estimated branded searches, -18.2% vs prior month. Share -2.3 points.

  2. 2.Dux

    20.7%

    Held 2nd. 3.9K estimated branded searches, +3.2% vs prior month. Share +2.6 points.

  3. 3.iStore

    12.7%

    Held 3rd. 2.4K estimated branded searches, -33.3% vs prior month. Share -4.5 points.

  4. 4.Reclaim Energy

    11%

    Held 4th. 2.1K estimated branded searches, -30.4% vs prior month. Share -3.3 points.

  5. 5.Aquamax

    10.1%

    Moved from 10th to 5th. 1.9K estimated branded searches, +387.2% vs prior month. Share +8.2 points.

  6. 6.Stiebel Eltron

    10.1%

    Moved from 5th to 6th. 1.9K estimated branded searches, 0% vs prior month. Share +1 points.

  7. 7.Rinnai

    5.3%

    Moved from 6th to 7th. 1K estimated branded searches, -23.1% vs prior month. Share -0.9 points.

  8. 8.SandenTherm

    3.1%

    Moved from 7th to 8th. 590 estimated branded searches, -18.1% vs prior month. Share -0.3 points.

  9. 9.Thermann

    2.5%

    Moved from 8th to 9th. 480 estimated branded searches, -18.6% vs prior month. Share -0.3 points.

  10. 10.Apricus

    2.1%

    Moved from 9th to 10th. 390 estimated branded searches, -18.8% vs prior month. Share -0.2 points.

Compare popularity between iStore and its closest rivals

Every comparison with iStore

9 comparisons

How has branded search demand for iStore changed in Australia over the last 12 months?

4 findings
  • Across the 12 months ending September 2026, estimated monthly branded searches for iStore in Australia fell from 2.9K to 2.4K.
  • Across the 12 months ending September 2026, iStore’s share of searches among hot water system brands in Australia increased from 12.1% to 12.7%.
  • Across the 12 months ending September 2026, iStore’s share of searches among hot water system brands in Australia peaked at 17.2% in August 2026 and was lowest at 8.1% in December 2025.
  • Across the 12 months ending September 2026, iStore rose from 4th to 3rd among hot water system brands in Australia.

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

6 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, Dux gained share of searches among hot water system brands in Australia, from 18.1% to 20.7%.

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

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

  5. In September 2026, Reclaim Energy lost share of searches among hot water system brands in Australia, from 14.3% to 11%.

  6. In September 2026, Rheem lost share of searches among hot water system brands in Australia, from 24.5% to 22.3%.

How are iStore’s branded searches counted?

1 search term

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

  • istore heat pump

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How the Brand Demand Index is measured

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