Brandwave

How popular isRinnai?

In September 2026, people searched for Rinnai by name about 3,950 times in New Zealand, a 7.6% increase from the previous year. These searches made up 56.8% of all New Zealand hot water system brand searches, placing Rinnai first out of five brands. When we asked both ChatGPT and Google AI Overviews about hot water system brands, Rinnai appeared in all answers and was the second most recommended of the five.

Search and AI answers in September 2026

Rinnai is the most searched of 5 competitors and the second most recommended in AI answers.

  1. RinnaiShare of searches 56.8%Mentioned in 3 of 3 AI answersPlace in AI recommendations 2nd
  2. RheemShare of searches 29%Mentioned in 3 of 3 AI answersPlace in AI recommendations 1st
  3. Stiebel EltronShare of searches 12.8%Mentioned in 1 of 3 AI answersPlace in AI recommendations 4th
  4. ThermannShare of searches 0.86%Mentioned in 1 of 3 AI answersPlace in AI recommendations 5th
  5. DuxShare of searches 0.52%Mentioned in 2 of 3 AI answersPlace in AI recommendations 3rd
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Top hot water system brands in ChatGPT and Google AI Overviews

In three ChatGPT questions, Rinnai appeared in all three answers. Rinnai is the second most recommended of the five.

Most recommended by AI

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

  1. Rheem1st
  2. Rinnai2nd
  3. Dux3rd
  4. Stiebel Eltron4th
  5. Thermann5th

Mentioned by AI

Each dot is one answer, filled in when that answer mentions the brand.

  • Rinnai3 of 3Named in 3 of 3 ChatGPT answers
  • Rheem3 of 3Named in 3 of 3 ChatGPT answers
  • Dux2 of 3Named in 2 of 3 ChatGPT answers
  • Stiebel Eltron1 of 3Named in 1 of 3 ChatGPT answers
  • Thermann1 of 3Named in 1 of 3 ChatGPT answers

See every answer about hot water system brands

3 answers

  • Asked ChatGPT

    “Which hot water system brand should I buy in New Zealand?”

    1. 1Rheem
    2. 2Rinnai

  • Asked ChatGPT

    “What are the best hot water system brands in New Zealand?”

    1. 1Rheem
    2. 2Rinnai
    3. 3Stiebel Eltron
    4. 4Dux
    5. 5Thermann

  • Asked ChatGPT

    “What's the best hot water system brand in New Zealand for a reliable shower?”

    1. 1Rheem
    2. 2Rinnai
    3. 3Dux

  • Searched Google, AI Overview

    “hot water cylinder nz”

    Google showed no AI Overview for this search.

  • Searched Google, AI Overview

    “gas water heater nz”

    Google showed no AI Overview for this search.

Brands are shown in the order each answer named them. The survey took place in New Zealand on October 21, 2026.

Which hot water system brands compete with Rinnai?

Rinnai against hot water system brands in New Zealand, by month

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

View monthly share of searches table
MonthRinnaiRheemStiebel EltronThermannDux
Oct 202553.4%31.3%13.3%1.3%0.72%
Nov 202550.8%32.9%14.7%1%0.6%
Dec 202556.8%31.2%10.5%1%0.52%
Jan 202654.9%29.9%13.7%0.87%0.65%
Feb 202661.4%26%11.1%0.9%0.54%
Mar 202656.1%29.5%12.4%1.3%0.67%
Apr 202653%31.5%13.8%1.1%0.72%
May 202655.7%27.9%14.8%0.96%0.64%
Jun 202656.2%27.9%14.5%0.92%0.46%
Jul 202657.1%28.5%13.1%0.71%0.57%
Aug 202654.8%32.1%11.6%0.91%0.61%
Sep 202656.8%29%12.8%0.86%0.52%

  1. 1.Rinnai

    56.8%

    Held 1st. 3.3K estimated branded searches, -9.1% vs prior month. Share +2.1 points.

  2. 2.Rheem

    29%

    Held 2nd. 1.7K estimated branded searches, -20.8% vs prior month. Share -3.1 points.

  3. 3.Stiebel Eltron

    12.8%

    Held 3rd. 740 estimated branded searches, -3.9% vs prior month. Share +1.1 points.

  4. 4.Thermann

    0.86%

    Held 4th. 50 estimated branded searches, -16.7% vs prior month. Share 0 points.

  5. 5.Dux

    0.52%

    Held 5th. 30 estimated branded searches, -25% vs prior month. Share -0.1 points.

Compare popularity between Rinnai and its closest rivals

Every comparison with Rinnai

15 comparisons

How has branded search demand for Rinnai changed in New Zealand over the last 12 months?

3 findings
  • Across the 12 months ending September 2026, estimated monthly branded searches for Rinnai in New Zealand rose from 3.7K to 4K.
  • Across the 12 months ending September 2026, Rinnai’s share of searches among hot water system brands in New Zealand increased from 53.4% to 56.8%.
  • Across the 12 months ending September 2026, Rinnai’s share of searches among hot water system brands in New Zealand peaked at 61.4% in February 2026 and was lowest at 50.8% in November 2025.

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

5 changes

  1. In September 2026, Rinnai gained share of searches among hot water system brands in New Zealand, from 54.8% to 56.8%.

  2. In September 2026, Stiebel Eltron gained share of searches among hot water system brands in New Zealand, from 11.6% to 12.8%.

  3. In September 2026, Rheem lost share of searches among hot water system brands in New Zealand, from 32.1% to 29%.

  4. Estimated monthly branded searches for Thermann in New Zealand fell 28.6% over 12 measured months, from 70 to 50 in September 2026.

  5. Estimated monthly branded searches for Dux in New Zealand fell 25% over 12 measured months, from 40 to 30 in September 2026.

How are Rinnai’s branded searches counted?

14 search terms

Brandwave collects information about searches that people make online using Rinnai’s name. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brand is growing, holding steady, or fading.

  • rinnai
  • rinnai air conditioner
  • rinnai dehumidifier
  • rinnai gas fires
  • rinnai gas heater
  • rinnai heat pump
  • rinnai heater
  • rinnai hot water
  • rinnai infinity
  • rinnai infinity 24
  • rinnai infinity 26
  • rinnai panel heater
  • rinnai tankless boiler
  • rinnai water heater

Do you work for Rinnai? To request corrections or removal please contact us via our support page and we will be happy to assist.

How the Brand Demand Index is measured

Where does Rinnai compete?

Rinnai is ranked in four competitor sets. Each share is worked out among that set's brands, so it differs from set to set.
Competitor setRankShare of searchesRanking
Heater and dehumidifier brands3rd of 523.1%Show ranking
Heat pump brands1st of 827.8%Show ranking
Panel heater brands2nd of 634.8%Show ranking
Hot water system brands1st of 556.8%Shown above
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