Hot water system brands in Australia:Which are most popular?

Name: Hot water system brands in Australia: Which are searched most?
Creator: Brandwave
License: https://creativecommons.org/licenses/by/4.0/

In September 2026, Rheem was the most searched hot water system brand in Australia, accounting for 22.3% of all searches among the ten brands we track. When we checked with ChatGPT and Google AI Overviews, Rheem and iStore were mentioned most often, in four of the five answers. iStore was recommended most often, coming first in three out of five responses.

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Top hot water system brands in ChatGPT and Google AI Overviews

In Brandwave's three ChatGPT questions and two Google AI Overviews, Rheem and iStore were mentioned most often, in four of the five answers. iStore was recommended most often, coming first in three out of five answers. Rheem was second, and Reclaim Energy was third. Aquamax, which ranked fifth in searches, was not mentioned at all.

Most recommended by AI

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

Mentioned by AI

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

How many AI answers named each brand
Brand	ChatGPT	Google	Answers that named it
Rheem	Named in 3 of 3 ChatGPT answers	Named in 1 of 2 Google AI Overviews	4 of 5
iStore	Named in 3 of 3 ChatGPT answers	Named in 1 of 2 Google AI Overviews	4 of 5
Reclaim Energy	Named in 2 of 3 ChatGPT answers	Named in 0 of 2 Google AI Overviews	2 of 5
Rinnai	Named in 1 of 3 ChatGPT answers	Named in 1 of 2 Google AI Overviews	2 of 5
Dux	Named in 0 of 3 ChatGPT answers	Named in 1 of 2 Google AI Overviews	1 of 5
Stiebel Eltron	Named in 0 of 3 ChatGPT answers	Named in 1 of 2 Google AI Overviews	1 of 5
Aquamax	Named in 0 of 3 ChatGPT answers	Named in 0 of 2 Google AI Overviews	0 of 5
SandenTherm	Named in 0 of 3 ChatGPT answers	Named in 0 of 2 Google AI Overviews	0 of 5
Thermann	Named in 0 of 3 ChatGPT answers	Named in 0 of 2 Google AI Overviews	0 of 5
Apricus	Named in 0 of 3 ChatGPT answers	Named in 0 of 2 Google AI Overviews	0 of 5

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

Asked ChatGPT
“What's the best hot water system in Australia?”
1. 1iStore
2. 2Reclaim Energy
3. 3Rheem
Asked ChatGPT
“Which heat pump hot water system should I buy?”
1. 1Reclaim Energy
2. 2iStore
3. 3Rheem
Asked ChatGPT
“Is gas or electric hot water better, and which brand?”
1. 1iStore
2. 2Rheem
3. 3Rinnai
Searched Google, AI Overview
“hot water system”
1. 1Dux
2. 2Rheem
3. 3Rinnai
Searched Google, AI Overview
“heat pump hot water”
1. 1iStore
2. 2Stiebel Eltron

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 do people search for most?

This chart shows how often people search Google for each hot water system brand 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.

Share of searches among hot water system brands in Australia, by month

Month	Rheem	Dux	iStore	Reclaim Energy	Aquamax	Stiebel Eltron	Rinnai	SandenTherm	Thermann	Apricus
Oct 2025	20.9%	19.2%	12.1%	10.4%	1.1%	7.9%	10%	3.7%	2.5%	12.1%
Nov 2025	21.5%	19.8%	10.3%	10.7%	0.91%	8.2%	10.3%	3.1%	2.5%	12.5%
Dec 2025	17.3%	31.8%	8.1%	7.2%	0.89%	6.8%	8.1%	2.5%	2%	15.3%
Jan 2026	18.9%	18.1%	8.8%	10.1%	1.5%	7.4%	8.8%	3.3%	2.7%	20.4%
Feb 2026	20.5%	18.5%	11.7%	10.7%	1.6%	7.8%	9.3%	3.5%	2.3%	14.2%
Mar 2026	22.5%	15.3%	13.1%	11.2%	1.8%	8.6%	8.6%	3.2%	2.7%	13.1%
Apr 2026	23.4%	15.9%	13.6%	11.1%	1.5%	7.5%	8.9%	4.1%	2.8%	11.2%
May 2026	28.8%	18.4%	11.3%	11.7%	1.5%	9%	9%	4.1%	2.8%	3.4%
Jun 2026	27.3%	16.9%	12.9%	13.3%	1.7%	10.7%	8.5%	3.9%	2.6%	2.1%
Jul 2026	26.3%	16.8%	14.9%	12.8%	2%	9.8%	8.2%	3.7%	3%	2.5%
Aug 2026	24.5%	18.1%	17.2%	14.3%	1.9%	9.1%	6.2%	3.4%	2.8%	2.3%
Sep 2026	22.3%	20.7%	12.7%	11%	10.1%	10.1%	5.3%	3.1%	2.5%	2.1%

Rank	Brand	Share of searches	Estimated monthly branded searches	vs prior month	Share change
1, held 1st	Rheem	22.3%	4.2K	-18.2%	-2.3 points
2, held 2nd	Dux	20.7%	3.9K	+3.2%	+2.6 points
3, held 3rd	iStore	12.7%	2.4K	-33.3%	-4.5 points
4, held 4th	Reclaim Energy	11%	2.1K	-30.4%	-3.3 points
5, moved from 10th to 5th	Aquamax	10.1%	1.9K	+387.2%	+8.2 pointsmoved from 10th to 5th
6, moved from 5th to 6th	Stiebel Eltron	10.1%	1.9K	0%	+1 pointsmoved from 5th to 6th
7, moved from 6th to 7th	Rinnai	5.3%	1K	-23.1%	-0.9 pointsmoved from 6th to 7th
8, moved from 7th to 8th	SandenTherm	3.1%	590	-18.1%	-0.3 pointsmoved from 7th to 8th
9, moved from 8th to 9th	Thermann	2.5%	480	-18.6%	-0.3 pointsmoved from 8th to 9th
10, moved from 9th to 10th	Apricus	2.1%	390	-18.8%	-0.2 pointsmoved from 9th to 10th

1.Rheem
22.3%
Held 1st. 4.2K estimated branded searches, -18.2% vs prior month. Share -2.3 points.
2.Dux
20.7%
Held 2nd. 3.9K estimated branded searches, +3.2% vs prior month. Share +2.6 points.
3.iStore
12.7%
Held 3rd. 2.4K estimated branded searches, -33.3% vs prior month. Share -4.5 points.
4.Reclaim Energy
11%
Held 4th. 2.1K estimated branded searches, -30.4% vs prior month. Share -3.3 points.
5.Aquamax
10.1%
Moved from 10th to 5th. 1.9K estimated branded searches, +387.2% vs prior month. Share +8.2 points.
6.Stiebel Eltron
10.1%
Moved from 5th to 6th. 1.9K estimated branded searches, 0% vs prior month. Share +1 points.
7.Rinnai
5.3%
Moved from 6th to 7th. 1K estimated branded searches, -23.1% vs prior month. Share -0.9 points.
8.SandenTherm
3.1%
Moved from 7th to 8th. 590 estimated branded searches, -18.1% vs prior month. Share -0.3 points.
9.Thermann
2.5%
Moved from 8th to 9th. 480 estimated branded searches, -18.6% vs prior month. Share -0.3 points.
10.Apricus
2.1%
Moved from 9th to 10th. 390 estimated branded searches, -18.8% vs prior month. Share -0.2 points.

Which brand is most popular in search among hot water system brands in Australia?

10 brands

In September 2026, Rheem was the most searched among hot water system brands in Australia, with an estimated 4.2K branded searches, 22.3% of all searches for the ten we track. Dux is in 2nd place, 1.5 percentage points behind at 20.7%.

Australia hot water system brands, last 12 months ending September 2026
Brand	Share of searches	Peak	Low	Rank
Rheem	20.9% → 22.3%	28.8%May 2026	17.3%Dec 2025	1st
Dux	19.2% → 20.7%	31.8%Dec 2025	15.3%Mar 2026	2nd
iStore	12.1% → 12.7%	17.2%Aug 2026	8.1%Dec 2025	4th → 3rd
Reclaim Energy	10.4% → 11%	14.3%Aug 2026	7.2%Dec 2025	5th → 4th
Aquamax	1.1% → 10.1%	10.1%Sep 2026	0.89%Dec 2025	10th → 5th
Stiebel Eltron	7.9% → 10.1%	10.7%Jun 2026	6.8%Dec 2025	7th → 6th
Rinnai	10% → 5.3%	10.3%Nov 2025	5.3%Sep 2026	6th → 7th
SandenTherm	3.7% → 3.1%	4.1%May 2026	2.5%Dec 2025	8th
Thermann	2.5%	3%Jul 2026	2%Dec 2025	9th
Apricus	12.1% → 2.1%	20.4%Jan 2026	2.1%Sep 2026	3rd → 10th

Each finding as a sentence

Across the 12 months ending September 2026, Rheem’s share of searches among hot water system brands in Australia increased from 20.9% to 22.3%.
Across the 12 months ending September 2026, Dux’s share of searches among hot water system brands in Australia increased from 19.2% to 20.7%.
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, Reclaim Energy’s share of searches among hot water system brands in Australia increased from 10.4% to 11%.
Across the 12 months ending September 2026, Aquamax’s share of searches among hot water system brands in Australia increased from 1.1% to 10.1%.
Across the 12 months ending September 2026, Stiebel Eltron’s share of searches among hot water system brands in Australia increased from 7.9% to 10.1%.
Across the 12 months ending September 2026, Rinnai’s share of searches among hot water system brands in Australia decreased from 10% to 5.3%.
Across the 12 months ending September 2026, SandenTherm’s share of searches among hot water system brands in Australia decreased from 3.7% to 3.1%.
Across the 12 months ending September 2026, Apricus’ share of searches among hot water system brands in Australia decreased from 12.1% to 2.1%.
Across the 12 months ending September 2026, Rheem’s share of searches among hot water system brands in Australia peaked at 28.8% in May 2026 and was lowest at 17.3% in December 2025.
Across the 12 months ending September 2026, Dux’s share of searches among hot water system brands in Australia peaked at 31.8% in December 2025 and was lowest at 15.3% in March 2026.
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, Reclaim Energy’s share of searches among hot water system brands in Australia peaked at 14.3% in August 2026 and was lowest at 7.2% in December 2025.
Across the 12 months ending September 2026, Aquamax’s share of searches among hot water system brands in Australia peaked at 10.1% in September 2026 and was lowest at 0.89% in December 2025.
Across the 12 months ending September 2026, Stiebel Eltron’s share of searches among hot water system brands in Australia peaked at 10.7% in June 2026 and was lowest at 6.8% in December 2025.
Across the 12 months ending September 2026, Rinnai’s share of searches among hot water system brands in Australia peaked at 10.3% in November 2025 and was lowest at 5.3% in September 2026.
Across the 12 months ending September 2026, SandenTherm’s share of searches among hot water system brands in Australia peaked at 4.1% in May 2026 and was lowest at 2.5% in December 2025.
Across the 12 months ending September 2026, Apricus’ share of searches among hot water system brands in Australia peaked at 20.4% in January 2026 and was lowest at 2.1% in September 2026.
Across the 12 months ending September 2026, iStore rose from 4th to 3rd among hot water system brands in Australia.
Across the 12 months ending September 2026, Reclaim Energy rose from 5th to 4th among hot water system brands in Australia.
Across the 12 months ending September 2026, Aquamax rose from 10th to 5th among hot water system brands in Australia.
Across the 12 months ending September 2026, Stiebel Eltron rose from 7th to 6th among hot water system brands in Australia.
Across the 12 months ending September 2026, Rinnai fell from 6th to 7th among hot water system brands in Australia.
Across the 12 months ending September 2026, Apricus fell from 3rd to 10th among hot water system brands in Australia.
Across the 12 months ending September 2026, Thermann held steady: its share of searches among hot water system brands in Australia moved less than 0.5 percentage points.

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

8 changes

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.
In September 2026, Dux gained share of searches among hot water system brands in Australia, from 18.1% to 20.7%.
In September 2026, Stiebel Eltron gained share of searches among hot water system brands in Australia, from 9.1% to 10.1%.
In September 2026, iStore lost share of searches among hot water system brands in Australia, from 17.2% to 12.7%.
In September 2026, Reclaim Energy lost share of searches among hot water system brands in Australia, from 14.3% to 11%.
In September 2026, Rheem lost share of searches among hot water system brands in Australia, from 24.5% to 22.3%.
In September 2026, Rinnai lost share of searches among hot water system brands in Australia, from 6.2% to 5.3%.
SandenTherm’s share of searches among hot water system brands in Australia has lost ground for 3 months in a row, from 3.9% to 3.1% in September 2026.

How are branded searches counted for hot water system brands?

13 search terms

Each brand's share of searches among hot water system brands comes from the terms listed under its name. When people mostly search for a brand because of something else it sells, only the searches that name this product count here.