Company lists · Data refreshed September 2026

Top 25 Industrial furnace manufacturers based in the United States

Name: Industrial furnace manufacturers based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 30, 2026 248 companies tracked

RevenueBase identified 248 industrial furnace manufacturers headquartered in the United States as of September 2026 and tracks 6,311 professional contacts across them, including 2,402 with verified work emails. Houston is the largest hub.

This list covers industrial furnace manufacturers headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 30, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 30, 2026 86% judged on-target in blind review

248Companies

6,311Contacts tracked

2,402Verified emails

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The 25 largest industrial furnace manufacturers based in the United States

Ranked by team size

Top 25 of 248 industrial furnace manufacturers based in the United States, ranked by team size, largest first. Data refreshed Sep 30, 2026. RevenueBase Smart Search rates how each company's information relates to industrial furnace manufacturers: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Thermon	Partial evidence	Austin, TX, United StatesHQ checked Sep 30, 2026	1,001-5,000	901 contacts →
	Partial evidence “Industrial Process Heating Solutions Through its global network, Thermon provides safe, reliable and innovative mission critical industrial process heating solutions.” Source: RevenueBase Database · checked Sep 30, 2026
2	Inductotherm Group	Indirect evidence	Rancocas, NJ, United StatesHQ checked Sep 30, 2026	1,001-5,000	375 contacts →
	Indirect evidence “WE BRING HEAT TO METAL.” Source: RevenueBase Database · checked Sep 30, 2026
3	Fosbel INC	Partial evidence	Cleveland, OH, United StatesHQ checked Sep 30, 2026	501-1,000	300 contacts →
	Partial evidence “Fosbel is the world leader in coke oven battery and glass furnace refractory maintenance services, rebuilds and construction.” Source: RevenueBase Database · checked Sep 30, 2026
4	Eisenmann INC	Indirect evidence	Greenville, SC, United StatesHQ checked Sep 30, 2026	501-1,000	241 contacts →
	Indirect evidence “Eisenmann is a leading international technology provider for custom-designed surface finishing, material flow automation, environmental as well as process & high-temperature…” Source: RevenueBase Database · checked Sep 30, 2026
5	Ajaxtocco Magnethermic	Strong evidence	Warren, OH, United StatesHQ checked Sep 30, 2026	201-500	234 contacts →
	Strong evidence “Ajax TOCCO Magnethermic® designs and manufactures world class induction heating and melting equipment for various industries and applications throughout the world.” Source: RevenueBase Database · checked Sep 30, 2026
6	BTU International	Indirect evidence	Westford, MA, United StatesHQ checked Sep 30, 2026	201-500	218 contacts →
	Indirect evidence “BTU International, a wholly-owned subsidiary of Amtech Group (Nasdaq: ASYS), is a global supplier and technology leader of advanced thermal processing equipment solutions in the…” Source: RevenueBase Database · checked Sep 30, 2026
7	Petro-Chem Development Co., INC	Partial evidence	Houston, TX, United StatesHQ checked Sep 30, 2026	501-1,000	127 contacts →
	Partial evidence “Petro-Chem Development Co, Inc (PCD) was founded in 1939 and has been recognized as a leader in the design and production of fired heaters and furnaces.” Source: RevenueBase Database · checked Sep 30, 2026
8	Consarc Corporation	Indirect evidence	Rancocas, NJ, United StatesHQ checked Sep 30, 2026	51-200	114 contacts →
	Indirect evidence “We have considerable experience in supplying custom-built equipment to suit highly specialized or individual requirements, enabling us to provide a comprehensive service and…” Source: RevenueBase Database · checked Sep 30, 2026
9	Despatch - ITW EAE	Indirect evidence	Lakeville, MN, United StatesHQ checked Sep 30, 2026	51-200	109 contacts →
	Indirect evidence “Despatch is a member of ITW EAE, a division of Illinois Tools Works, Inc, and has specialized in thermal processing for over 100 years and is actively using this technical…” Source: RevenueBase Database · checked Sep 30, 2026
10	Thermal Product Solutions	Strong evidence	New Columbia, PA, United StatesHQ checked Sep 30, 2026	51-200	107 contacts →
	Strong evidence “Thermal Product Solutions (TPS) designs and manufactures industrial and laboratory ovens and furnaces, and environmental temperature cycling and stability test chambers.” Source: RevenueBase Database · checked Sep 30, 2026
11	Sinto America, INC	Indirect evidence	Grand Ledge, MI, United StatesHQ checked Sep 30, 2026	201-500	99 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 30, 2026
12	Retech A Seco Warwick Company	Partial evidence	Buffalo, NY, United StatesHQ checked Sep 30, 2026	51-200	98 contacts →
	Partial evidence “Since 1963, Retech has been a global leader in the supply of metallurgical processing equipment for demanding industries in ever-changing markets.” Source: RevenueBase Database · checked Sep 30, 2026
13	Afc-Holcroft	Partial evidence	Wixom, MI, United StatesHQ checked Sep 30, 2026	51-200	86 contacts →
	Partial evidence “Global supplier of industrial Heat Treating Equipment, serving a variety of markets worldwide.” Source: RevenueBase Database · checked Sep 30, 2026
14	Inductoheat	Indirect evidence	Madison Heights, MI, United StatesHQ checked Sep 30, 2026	201-500	84 contacts →
	Indirect evidence “We design, build and repair high-quality general purpose, turn-key, and fully automated induction heating equipment.” Source: RevenueBase Database · checked Sep 30, 2026
15	Harper International Corporation	Partial evidence	Buffalo, NY, United StatesHQ checked Sep 30, 2026	51-200	84 contacts →
	Partial evidence “Harper International is a global leader in complete thermal processing solutions and technical services for the production of advanced materials, including Furnaces, Kilns…” Source: RevenueBase Database · checked Sep 30, 2026
16	Inductotherm Corp	Partial evidence	Rancocas, NJ, United StatesHQ checked Sep 30, 2026	201-500	80 contacts →
	Partial evidence “We design and manufacture the most advanced induction melting, heating, holding and pouring systems for virtually all metal and material processing.” Source: RevenueBase Database · checked Sep 30, 2026
17	Sigma Thermal, INC	Indirect evidence	Marietta, GA, United StatesHQ checked Sep 30, 2026	51-200	75 contacts →
	Indirect evidence “Sigma Thermal designs, engineers, supplies, and services process heating systems for industry.” Source: RevenueBase Database · checked Sep 30, 2026
18	Consolidated Engineering Company	Indirect evidence	Kennesaw, GA, United StatesHQ checked Sep 30, 2026	51-200	75 contacts →
	Indirect evidence “Welcome to CEC!” Source: RevenueBase Database · checked Sep 30, 2026
19	Gillespie & Powers, INC	Strong evidence	St. Louis, MO, United StatesHQ checked Sep 30, 2026	51-200	68 contacts →
	Strong evidence “INDUSTRIAL FURNACES Aluminum Furnace Experts.” Source: RevenueBase Database · checked Sep 30, 2026
20	Heattek	Indirect evidence	Ixonia, WI, United StatesHQ checked Sep 30, 2026	51-200	66 contacts →
	Indirect evidence “In some of the brightest minds in the oven and heat-treating industry combined hundreds of years of experience to form HeatTek.” Source: RevenueBase Database · checked Sep 30, 2026
21	Thermatool	Indirect evidence	East Haven, CT, United StatesHQ checked Sep 30, 2026	51-200	63 contacts →
	Indirect evidence “Thermatool is part of 40 companies making up the Inductotherm Group.” Source: RevenueBase Database · checked Sep 30, 2026
22	Surface Combustion, INC	Partial evidence	Maumee, OH, United StatesHQ checked Sep 30, 2026	51-200	63 contacts →
	Partial evidence “Surface Combustion provides a single source for atmosphere and vacuum heat treatment furnaces for the global manufacturing company.” Source: RevenueBase Database · checked Sep 30, 2026
23	Wisconsin Oven	Indirect evidence	East Troy, WI, United StatesHQ checked Sep 30, 2026	51-200	62 contacts →
	Indirect evidence “Wisconsin Oven Corporation is located in East Troy, Wisconsin, southwest of Milwaukee and northwest of Chicago.” Source: RevenueBase Database · checked Sep 30, 2026
24	Pillar Induction	Indirect evidence	Brookfield, WI, United StatesHQ checked Sep 30, 2026	51-200	60 contacts →
	Indirect evidence “Pillar is a leading global supplier of induction heating and melting equipment.” Source: RevenueBase Database · checked Sep 30, 2026
25	Selas Heat Technology Company, LLC	Strong evidence	Streetsboro, OH, United StatesHQ checked Sep 30, 2026	51-200	57 contacts →
	Strong evidence “Selas is a leading industrial burner manufacturer serving the thermal processing industry with a comprehensive range of innovative and reliable gas burners, combustion systems and…” Source: RevenueBase Database · checked Sep 30, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: industrial furnace manufacturers. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names industrial furnace manufacturers.
Partial evidence: Its own public description names part of industrial furnace manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name industrial furnace manufacturers. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 248 industrial furnace manufacturers based in the United States

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Industrial furnace manufacturers based in the United States at a glance

As of Sep 30, 2026

38.1%Verified-email coverage

25.4Average contacts per company

11-50Median size (employees)

2.4%Largest-city concentration · Houston

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 248 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among industrial furnace manufacturers, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “industrial furnace manufacturers”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names industrial furnace manufacturers), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among industrial furnace manufacturers, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 2,402 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 30, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names industrial furnace manufacturers, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many industrial furnace manufacturers are there based in the United States?

RevenueBase identified 248 industrial furnace manufacturers headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Thermon, headquartered in Austin, tops this list with the largest team on record.

Which city has the most industrial furnace manufacturers?

Houston leads with 6 headquartered companies, followed by Cleveland (5) and Pico Rivera (4).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 2,402 verified decision-maker contacts tracked across these 248 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 30, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.