AI Visibility Index: Heat Exchangers in California

When a buyer asks an AI assistant for a heat exchangers supplier in California, these are the companies that get named. This is what we found when the cell was last measured.

137 companies tracked
Last measured September 30, 2026
Next measurement October 30, 2026

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The headline numbers

Never named by AI

121 of 137

companies never appeared in a single buying question

They were asked the same 5 buying questions as everyone else in this cell and were not named once.

16 named at least once
121 never named

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Cell average: 0.19of 15
Across all 137 tracked companies.
Top ten average: 3of 15
The ten most visible companies in the cell.

A company's score is how many of the 15 measured answers named it.

The top ten in California

These are the companies AI assistants named most often when California buyers went looking for a supplier in this category.

Top 10 most AI-visible Heat Exchangers companies in California, measured September 30, 2026
Rank	Company	Location	AI visibility
1	SDG International California	California	6 of 15 answers
2	TITAN Metal Fabricators 20 employeesCamarillo, California	Camarillo, California	4 of 15 answers
3	Vacuum Process Engineering 30 employeesSacramento, California	Sacramento, California	4 of 15 answers
4	Komax Systems, Inc 12 employeesHuntington Beach, California 2 name variants Komax Systemsmost common2 Komax Systems, Inc.1	Huntington Beach, California	3 of 15 answers
5	Chillermen California	California	3 of 15 answers
6	Calpacific Equipment Company 10 employeesRichmond, California	Richmond, California	2 of 15 answers
7	South Gate Engineering LLC 115 employeesChino, California 2 name variants South Gate Engineeringmost common1 Southgate Engineering1	Chino, California	2 of 15 answers
8	Cooltube, Inc. California	California	2 of 15 answers
9	Cust-O-Fab California	California	2 of 15 answers
10	Exact Exchanger Inc. California	California	2 of 15 answers

37 more companies were named at least once. Companies outside the top ten are counted in the averages but not named here.

Also named, based in another state

AI assistants named these companies too, but MacRAE'S lists them in a different state, not California. They belong to that state's ranking, not this one.

Company	State	Mentions
Howard’s Engineering	Connecticut	3 of 15
Enerquip Thermal Solutions	Wisconsin	2 of 15
Harris Thermal Transfer Products	Oregon	2 of 15
Metalforms	Texas	2 of 15
Perry Products	New Jersey	2 of 15
PPV Corp	Oregon	2 of 15

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The five questions we asked

Every company in this cell is measured on the same questions, written the way a buyer would type them. That is what makes the ranking a comparison rather than a collection of anecdotes.

1“Best heat exchanger companies in California”
2“Who supplies custom shell-and-tube heat exchangers in California”
3“I need a California heat exchanger partner for a high-pressure chemical processing line, who should I talk to”
4“Top heat exchanger suppliers in California for process engineering buyers”
5“Which California heat exchanger manufacturers can handle ASME-coded stainless steel units for corrosive media”
6“List 20 heat exchanger companies in California with their specialties.”the roster question

Each question is asked more than once, which is why a company's score is out of 15 answers rather than out of the number of questions.

Where AI drew its answers from

These are the sources the answers in this cell leaned on most, ranked by how many of the named companies each one stands behind.

thomasnet.comDirectory
13 companies
johansing.com
3 companies
apiheattransfer.com
2 companies
iqsdirectory.comDirectory
2 companies
perryproducts.com
2 companies
thermaltransfer.com
2 companies
transtechfabrication.com
2 companies
komax.com
2 companies
southgateengineering.com
2 companies
harristhermal.com
1 company
aero-classics.com
1 company
aimheatexchangers.com
1 company

62 sources were cited across this cell's answers from 52 domains. A directory page often stands behind several companies at once; a company's own site usually stands behind one.

California in context

California ranks 5th of 9 measured states in this category. Each bar is the share of that state's tracked companies that AI assistants named at least once; across every measured state in this category the share is 12%.

Michigan16%
Pennsylvania15%
Illinois13%
New Jersey13%
California12%
New York12%
Ohio11%
Texas10%
Florida9%

California (this report)Other measured statesCategory average (12%)

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