AI Visibility Index · Cell report

Measured

AI Visibility Index: Heat Exchangers in Illinois

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

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

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The headline numbers

Never named by AI

78 of 90

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.

12 named at least once
78 never named

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Cell average: 0.5of 15
Across all 90 tracked companies.
Top ten average: 4.8of 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 Illinois

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

Top 10 most AI-visible Heat Exchangers companies in Illinois, measured September 30, 2026
Rank	Company	Location	AI visibility
1	Mason Manufacturing, LLC 60 employeesDecatur, Illinois 2 name variants Mason Manufacturingmost common11 Mason Manufacturing LLC2	Decatur, Illinois	13 of 15 answers
2	PETRO-CHEM INDUSTRIES 12 employeesChicago, Illinois	Chicago, Illinois	6 of 15 answers
3	Thermal Processing Solutions 15 employeesSouth Elgin, Illinois 3 name variants Thermal Processing Solutions (TPS)most common3 Thermal Processing Solutions, Inc.2 Thermal Processing Solutions, Inc. (TPS)1	South Elgin, Illinois	6 of 15 answers
4	Mills-Winfield Engineering Sales 16 employeesItasca, Illinois 3 name variants Mills‑Winfield Engineering Sales Inc.most common2 Mills‑Winfield2 Mills‑Winfield Corporation1	Itasca, Illinois	5 of 15 answers
5	Standard Refrigeration Illinois	Illinois	4 of 15 answers
6	Ability Engineering Technology Inc. 30 employeesSouth Holland, Illinois 2 name variants Ability Engineering Technology (AET)most common2 Ability Engineering Technology1	South Holland, Illinois	3 of 15 answers
7	Catalytic Products International 26 employeesLake Zurich, Illinois	Lake Zurich, Illinois	3 of 15 answers
8	Peters Machine, LLC 25 employeesDecatur, Illinois 2 name variants Peter’s Machinemost common2 Peters Machine1	Decatur, Illinois	3 of 15 answers
9	Cast Aluminum Solutions Illinois	Illinois	3 of 15 answers
10	Howe Corporation 37 employeesChicago, Illinois	Chicago, Illinois	2 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 Illinois. They belong to that state's ranking, not this one.

Company	State	Mentions
Tranter, Inc.	Texas	3 of 15
CompRex	Washington	2 of 15
Apache Stainless Equipment	Wisconsin	1 of 15
Berg Chilling Systems Inc. – U.S. office	Ontario	1 of 15
Brask, Inc.	Louisiana	1 of 15

Named, but placed in another state

The AI answers themselves put these companies in a different state, so they were not counted for Illinois. Whether MacRAE'S lists them elsewhere is not yet known.

Company	State	Mentions
KAM Thermal	Pennsylvania	2 of 15

One of these yours?

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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 Illinois”
2“Who supplies custom shell-and-tube heat exchangers in Illinois”
3“I need a Illinois heat exchanger partner for a high-pressure chemical processing line, who should I talk to”
4“Top heat exchanger suppliers in Illinois for process engineering buyers”
5“Which Illinois heat exchanger manufacturers can handle ASME-coded stainless steel units for corrosive media”
6“List 20 heat exchanger companies in Illinois 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
11 companies
petrochemind.com
3 companies
mills-winfield.com
3 companies
tpshome.com
3 companies
masonmfg.com
2 companies
kamthermal.com
2 companies
comprex-llc.com
2 companies
petersmachine.com
2 companies
pmtnuclear.com
2 companies
andersonprocess.com
1 company
abilityengineering.com
1 company
apachestainless.com
1 company

44 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.

Illinois in context

Illinois ranks 3rd 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%.

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

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