AI Visibility Index: Industrial Boilers in California

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

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

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The headline numbers

Never named by AI

178 of 186

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.

8 named at least once
178 never named

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Cell average: 0.16of 15
Across all 186 tracked companies.
Top ten average: 6of 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 Industrial Boilers companies in California, measured September 30, 2026
Rank	Company	Location	AI visibility
1	R.F. MacDonald Co. 45 employeesHayward, California	Hayward, California	12 of 15 answers
2	California Boiler California 2 name variants California Boilermost common6 California Boiler, Inc.5	California	11 of 15 answers
3	Kendrick Boiler Works Inc 8 employeesNewcastle, California 2 name variants Kendrick Boiler Worksmost common6 Kendrick Boiler Works, Inc.1	Newcastle, California	7 of 15 answers
4	Nationwide Boiler Inc 35 employeesFremont, California	Fremont, California	6 of 15 answers
5	Powerhouse Combustion & Mechanical Corp. California 3 name variants Powerhouse Combustion & Mechanical Corp.most common3 Powerhouse Combustion & Mechanical Corporation2 Powerhouse Combustion & Mechanical1	California	6 of 15 answers
6	Bay City Boiler California	California	5 of 15 answers
7	One Source Engineering California	California	4 of 15 answers
8	Coastal Boiler Works California	California	3 of 15 answers
9	DB Sales & Service California	California	3 of 15 answers
10	McKenna Boiler Works, Inc. California 2 name variants McKenna Boiler Works, Inc.most common2 McKenna Boiler Works1	California	3 of 15 answers

25 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
Boiler Dynamics Inc. (BDI)	Illinois	2 of 15
Boiler Equipment Company (BEC)	Tennessee	2 of 15
Servco (Holbrook Servco)	New York	2 of 15
Canseco Boilers (CBS)	New York	1 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 suppliers of industrial boilers in California”
2“Who supplies high-pressure packaged fire-tube industrial boilers in California”
3“I need a California industrial boiler partner for a new food processing plant installation, who should I talk to”
4“Top industrial boiler suppliers in California for facilities and maintenance buyers”
5“Which California industrial boiler companies can handle turnkey installation and commissioning of 100,000 lb per hour steam systems”
6“List 20 industrial boiler 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
6 companies
powerhouse-combustion.com
3 companies
globalspec.comDirectory
3 companies
baycityboiler.com
2 companies
californiaboiler.com
2 companies
cansecoboilers.com
2 companies
cdn.thomasnet.com
2 companies
kendrickboiler.com
2 companies
nationwideboiler.com
2 companies
boilerbasics.com
2 companies
coopermi.com
2 companies
holbrookservco.com
2 companies

51 sources were cited across this cell's answers from 35 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 16th of 18 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 6%.

California (this report)Other measured statesCategory average (6%)

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