--- title: "Rheem vs Rinnai: Which is searched more?" description: "Is Rheem or Rinnai more popular in search? Compare estimated monthly branded-search demand and Share of Search inside the Tankless water heater brands set worldwide. 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/global-en/categories/tankless-water-heater-brands/compare/rheem-vs-rinnai" publisher: "Brandwave" --- # Rheem vs Rinnai: Which is searched more? Is Rheem or Rinnai more popular in search? Compare estimated monthly branded-search demand and Share of Search inside the Tankless water heater brands set worldwide. 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**: Rheem and Rinnai - **Competitive set**: Tankless water heater brands - **Market**: Global - **Month measured**: Sep 2026 - **Rheem Share of Search**: 15.3% - **Rinnai Share of Search**: 2% ## Is Rheem or Rinnai more popular in search? - In September 2026, Rheem had more branded searches than Rinnai among tankless water heater brands worldwide. Rheem had about 12,100 branded searches, while Rinnai had 1,600. Rheem made up 15.3% of all tankless water heater brand searches we track, and Rinnai accounted for 2%. - Rheem was ahead of Rinnai in every measured month of the 12 months ending September 2026. - Across the 12 months ending September 2026, Rheem’s share of searches among tankless water heater brands worldwide moved from 20.5% to 15.3%, and its estimated monthly branded searches moved from 22.2K to 12.1K. - Across the 12 months ending September 2026, Rinnai’s share of searches among tankless water heater brands worldwide moved from 1.5% to 2%, and its estimated monthly branded searches held steady at 1.6K. ## Top tankless water heater brands in ChatGPT and Google AI Overviews In three ChatGPT questions and two Google AI Overviews, Rheem and Rinnai were each mentioned in three out of five: in two of the three ChatGPT answers and in one of the two Google AI Overviews. Rinnai was listed before Rheem in every answer. 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 | | --- | --- | --- | --- | --- | | Rinnai | 1st | 2 of 3 | 1 of 2 | 3 of 5 | | Navien | 2nd | 2 of 3 | 1 of 2 | 3 of 5 | | Rheem | 3rd | 2 of 3 | 1 of 2 | 3 of 5 | | Noritz | 4th | 1 of 3 | 0 of 2 | 1 of 5 | | Takagi | Not ranked | 0 of 3 | 0 of 2 | 0 of 5 | | EcoSmart | Not ranked | 0 of 3 | 0 of 2 | 0 of 5 | ## Every AI answer about tankless water heater brands - Asked ChatGPT "What's the best tankless water heater?": 1. Rinnai, 2. Navien, 3. Rheem - Asked ChatGPT "Which tankless water heater brand is most reliable?": 1. Rinnai, 2. Noritz, 3. Navien, 4. Rheem - Asked ChatGPT "Should I get a gas or electric tankless water heater?": named none of the brands we track - Searched Google, AI Overview "tankless water heater": named none of the brands we track - Searched Google, AI Overview "best tankless water heater": 1. Rinnai, 2. Navien, 3. Rheem Not named in any answer: Takagi and EcoSmart. Brands are listed in the order each answer named them. The answers were collected in the United States on October 27, 2026. ## How did search popularity change for tankless water heater brands worldwide in September 2026? - In September 2026, Rheem lost share of searches among tankless water heater brands worldwide, from 20% to 15.3%. ## Month by month | Month | Rheem estimated searches | Rheem Share of Search | Rheem rank | Rinnai estimated searches | Rinnai Share of Search | Rinnai rank | | --- | --- | --- | --- | --- | --- | --- | | Oct 2025 | 22.2K | 20.5% | 2 | 1.6K | 1.5% | 5 | | Nov 2025 | 18.1K | 17.4% | 2 | 1.6K | 1.5% | 5 | | Dec 2025 | 27.1K | 23.4% | 2 | 1.9K | 1.6% | 5 | | Jan 2026 | 33.1K | 24.9% | 2 | 1.9K | 1.4% | 5 | | Feb 2026 | 22.2K | 20.4% | 2 | 1.9K | 1.7% | 5 | | Mar 2026 | 27.1K | 22.6% | 2 | 1.9K | 1.6% | 5 | | Apr 2026 | 33.1K | 31.8% | 2 | 1.6K | 1.5% | 5 | | May 2026 | 33.1K | 35.7% | 2 | 1.6K | 1.7% | 5 | | Jun 2026 | 14.8K | 20% | 2 | 1.6K | 2.2% | 5 | | Jul 2026 | 18.1K | 21.3% | 2 | 1.6K | 1.9% | 5 | | Aug 2026 | 14.8K | 20% | 2 | 1.6K | 2.2% | 5 | | Sep 2026 | 12.1K | 15.3% | 2 | 1.6K | 2% | 5 | ## How each brand is measured Brandwave collects information about searches that people make online using Rheem’s and Rinnai’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. - **Rheem**: Measured on the search term “rheem tankless”. - **Rinnai**: Measured on the search term “rinnai tankless”. - [Rheem profile](/demand/global-en/brands/rheem) - [Rinnai profile](/demand/global-en/brands/rinnai) - [All tankless water heater brands worldwide](/demand/global-en/categories/tankless-water-heater-brands): The set both shares are measured inside, 6 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 Rheem or Rinnai more popular in search? In September 2026, Rheem had more branded searches than Rinnai among tankless water heater brands worldwide. Rheem had about 12,100 branded searches, while Rinnai had 1,600. Rheem made up 15.3% of all tankless water heater brand searches we track, and Rinnai accounted for 2%. ## Cite this page Brandwave. "Rheem vs Rinnai: Which is searched more?". https://gobrandwave.com/demand/global-en/categories/tankless-water-heater-brands/compare/rheem-vs-rinnai This page is also available as HTML at https://gobrandwave.com/demand/global-en/categories/tankless-water-heater-brands/compare/rheem-vs-rinnai. Brandwave publishes an index of its Markdown pages at https://gobrandwave.com/llms.txt.