--- title: "iStore vs Rheem: Which is searched more in Australia?" description: "Is iStore or Rheem more popular in search? Compare estimated monthly branded-search demand and Share of Search inside the Hot water system brands set in Australia. Branded searches tell you how often people look for a brand by name or related terms. Comparing these searches across competitors helps you see how popular each brand is over time." canonical: "https://gobrandwave.com/demand/au/compare/istore-vs-rheem" publisher: "Brandwave" --- # iStore vs Rheem: Which is searched more in Australia? Is iStore or Rheem more popular in search? Compare estimated monthly branded-search demand and Share of Search inside the Hot water system brands set in Australia. Branded searches tell you how often people look for a brand by name or related terms. Comparing these searches across competitors helps you see how popular each brand is over time. ## Key facts - **Compared**: iStore and Rheem - **Competitive set**: Hot water system brands - **Market**: Australia - **Month measured**: Sep 2026 - **iStore Share of Search**: 12.7% - **Rheem Share of Search**: 22.3% ## Is iStore or Rheem more popular in search? - In September 2026, Rheem had more branded searches than iStore among hot water system brands in Australia. Rheem had about 4,190 branded searches, while iStore had 2,400. Rheem made up 22.3% of all hot water system brand searches we track, and iStore accounted for 12.7%. - Rheem was ahead of iStore in every measured month of the 12 months ending September 2026. - Across the 12 months ending September 2026, iStore’s share of searches among hot water system brands in Australia moved from 12.1% to 12.7%, and its estimated monthly branded searches moved from 2.9K to 2.4K. - Across the 12 months ending September 2026, Rheem’s share of searches among hot water system brands in Australia moved from 20.9% to 22.3%, and its estimated monthly branded searches moved from 5K to 4.2K. ## Top hot water system brands in ChatGPT and Google AI Overviews In three ChatGPT questions and two Google AI Overviews, iStore and Rheem were each mentioned in four out of five: in all three ChatGPT answers and in one of the two Google AI Overviews. iStore was listed before Rheem in four out of five answers. Brands get a higher AI rank if they are mentioned earlier in the answers that list options. | Brand | AI rank | ChatGPT answers that named it | Google AI Overviews that named it | All answers that named it | | --- | --- | --- | --- | --- | | iStore | 1st | 3 of 3 | 1 of 2 | 4 of 5 | | Rheem | 2nd | 3 of 3 | 1 of 2 | 4 of 5 | | Reclaim Energy | 3rd | 2 of 3 | 0 of 2 | 2 of 5 | | Dux | 4th | 0 of 3 | 1 of 2 | 1 of 5 | | Rinnai | 5th | 1 of 3 | 1 of 2 | 2 of 5 | | Stiebel Eltron | 6th | 0 of 3 | 1 of 2 | 1 of 5 | | Aquamax | Not ranked | 0 of 3 | 0 of 2 | 0 of 5 | | SandenTherm | Not ranked | 0 of 3 | 0 of 2 | 0 of 5 | | Thermann | Not ranked | 0 of 3 | 0 of 2 | 0 of 5 | | Apricus | Not ranked | 0 of 3 | 0 of 2 | 0 of 5 | ## Every AI answer about hot water system brands - Asked ChatGPT "What's the best hot water system in Australia?": 1. iStore, 2. Reclaim Energy, 3. Rheem - Asked ChatGPT "Which heat pump hot water system should I buy?": 1. Reclaim Energy, 2. iStore, 3. Rheem - Asked ChatGPT "Is gas or electric hot water better, and which brand?": 1. iStore, 2. Rheem, 3. Rinnai - Searched Google, AI Overview "hot water system": 1. Dux, 2. Rheem, 3. Rinnai - Searched Google, AI Overview "heat pump hot water": 1. iStore, 2. Stiebel Eltron Not named in any answer: Aquamax, SandenTherm, Thermann and Apricus. Brands are listed in the order each answer named them. The answers were collected in Australia on October 27, 2026. ## How did search popularity change for Australia hot water system brands in September 2026? - In September 2026, iStore lost share of searches among hot water system brands in Australia, from 17.2% to 12.7%. - In September 2026, Rheem lost share of searches among hot water system brands in Australia, from 24.5% to 22.3%. ## Month by month | Month | iStore estimated searches | iStore Share of Search | iStore rank | Rheem estimated searches | Rheem Share of Search | Rheem rank | | --- | --- | --- | --- | --- | --- | --- | | Oct 2025 | 2.9K | 12.1% | 4 | 5K | 20.9% | 1 | | Nov 2025 | 2.4K | 10.3% | 5 | 5K | 21.5% | 1 | | Dec 2025 | 1.9K | 8.1% | 4 | 4.1K | 17.3% | 2 | | Jan 2026 | 1.9K | 8.8% | 5 | 4.1K | 18.9% | 2 | | Feb 2026 | 2.4K | 11.7% | 4 | 4.2K | 20.5% | 1 | | Mar 2026 | 2.9K | 13.1% | 4 | 5K | 22.5% | 1 | | Apr 2026 | 2.9K | 13.6% | 3 | 5K | 23.4% | 1 | | May 2026 | 2.4K | 11.3% | 4 | 6.1K | 28.8% | 1 | | Jun 2026 | 2.9K | 12.9% | 4 | 6.1K | 27.3% | 1 | | Jul 2026 | 2.9K | 14.9% | 3 | 5.1K | 26.3% | 1 | | Aug 2026 | 3.6K | 17.2% | 3 | 5.1K | 24.5% | 1 | | Sep 2026 | 2.4K | 12.7% | 3 | 4.2K | 22.3% | 1 | ## How each brand is measured Brandwave collects information about searches that people make online using iStore’s and Rheem’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**: Measured on the search term “istore heat pump”. - **Rheem**: Measured on the search terms “rheem” and “rheem hot water”, summed into one figure. - [iStore profile](/demand/au/brands/istore) - [Rheem profile](/demand/au/brands/rheem) - [All hot water system brands in Australia](/demand/au/categories/au-hot-water-system-brands): The set both shares are measured inside, 10 brands. ## Methodology - [How is the Brand Demand Index measured?](/demand/methodology): Where the figures come from, what they compare, and how they may be reused. ## Frequently asked questions ### Is iStore or Rheem more popular in search? In September 2026, Rheem had more branded searches than iStore among hot water system brands in Australia. Rheem had about 4,190 branded searches, while iStore had 2,400. Rheem made up 22.3% of all hot water system brand searches we track, and iStore accounted for 12.7%. ## Cite this page Brandwave. "iStore vs Rheem: Which is searched more in Australia?". https://gobrandwave.com/demand/au/compare/istore-vs-rheem This page is also available as HTML at https://gobrandwave.com/demand/au/compare/istore-vs-rheem. Brandwave publishes an index of its Markdown pages at https://gobrandwave.com/llms.txt.