Company lists · Data refreshed September 2026
Top 25 Furnace filter manufacturers based in the United States
RevenueBase identified 285 furnace filter manufacturers headquartered in the United States as of September 2026 and tracks 5,870 professional contacts across them, including 1,688 with verified work emails. Louisville is the largest hub.
This list covers furnace filter 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.
The 25 largest furnace filter manufacturers based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 806 contacts → | ||||
Indirect evidence “AAF International clean air products and systems offer the most comprehensive clean air solutions available in the world.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 2 | 562 contacts → | ||||
Strong evidence “K&N Engineering is the world's leading manufacturer of washable performance air filters and air intake systems.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 3 | 261 contacts → | ||||
Partial evidence “Camfil is a leading supplier of HVAC air filters."The Camfil Group is a world leader in the development and production of air filters and clean air solutions." The Group…” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 4 | 254 contacts → | ||||
Partial evidence “At Champion Laboratories, Inc, we are committed to quality and service in light-duty and heavy-duty filter manufacturing.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 5 | 227 contacts → | ||||
Strong evidence “Flanders is a leading air filtration products manufacturer.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 6 | 213 contacts → | ||||
Indirect evidence “Columbus Industries is a global company that has grown steadily since its inception in 1965 to include over 900 associates in seven locations worldwide.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 7 | 183 contacts → | ||||
Partial evidence “Filterbuy is a direct to consumer replacement air filter brand, headquartered in the Southeast of the United States and serving homes and businesses across the country.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 8 | 125 contacts → | ||||
Indirect evidence “88 Years in Business 1936-2024.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 9 | 124 contacts → | ||||
Indirect evidence “Abatement Technologies, Inc.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 10 | 104 contacts → | ||||
Partial evidence “At Rensa Filtration, our mission is to help people breathe cleaner air.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 11 | 82 contacts → | ||||
Strong evidence “WHO WE ARE: Koch Filter is a leading manufacturer of indoor air filtration solutions that protect the quality of life for individuals while protecting processes and equipment in…” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 12 | 72 contacts → | ||||
Partial evidence “AJR Filtration, has been proudly manufacturing in the USA since 1997.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 13 | 58 contacts → | ||||
Indirect evidence “WE DELIVER UPTIME.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 14 | 46 contacts → | ||||
Partial evidence “Founded in 1953, Filter Sales & Service, Inc.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 15 | 37 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 16 | 36 contacts → | ||||
Partial evidence “Air-Nu has been in the filtration business for over 30 years.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 17 | 31 contacts → | ||||
Partial evidence “FSI is a regional leader that locally maintains inventory for your HVAC filtration products, supplies all Industrial Products, and provides the highest quality filter change-out…” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 18 | 29 contacts → | ||||
Indirect evidence “Dust Free® is a family owned and operated business headquartered in Royse City, TX, just 40 miles east of downtown Dallas.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 19 | 26 contacts → | ||||
Partial evidence “Filter King provides high quality HVAC air filters for homes and businesses across the United States.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 20 | 26 contacts → | ||||
Strong evidence “Standard Filter manufactures and supplies a complete line of aftermarket filters and cartridges for nearly every baghouse or dust collector in operation.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 21 | 26 contacts → | ||||
Partial evidence “Superior Fibers is the global innovation leader in glass filament filtration media.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 22 | 25 contacts → | ||||
Indirect evidence “For 53 years and counting, We Care About Your Air.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 23 | 25 contacts → | ||||
Partial evidence “Commercial and industrial filters, HVAC filters, Dust Collection, water filters, Electrostatic water treatment for cooling towers, belts, negative air machines, cottonwood filters.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 24 | 25 contacts → | ||||
Partial evidence “At Hyland Filter Service, our mission is to provide a more clean and more comfortable environment for our customer facilities and to help reduce energy related costs.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 25 | 24 contacts → | ||||
Partial evidence “Your SPECIALIZED AIR FILTER SUPPLY partner Delivering FULLY DE-RISKED filtration while saving LABOR, ENERGY and SPACE For COMPLEX AIR CONDITIONED ENVIROMENTS That need OPTIMUM AIR…” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
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: furnace filter 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 furnace filter manufacturers.
- Partial evidence
- Its own public description names part of furnace filter manufacturers, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name furnace filter 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 285 furnace filter manufacturers based in the United States
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Furnace filter manufacturers based in the United States at a glance
As of Sep 30, 2026Companies by employee count
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 285 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 furnace filter 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 “furnace filter 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 furnace filter 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 furnace filter 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, 1,688 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 furnace filter 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 furnace filter manufacturers are there based in the United States?
RevenueBase identified 285 furnace filter 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?
AAF International American AIR Filter, headquartered in Louisville, tops this list with the largest team on record.
Which city has the most furnace filter manufacturers?
Louisville leads with 7 headquartered companies, followed by Indianapolis (5) and Dallas (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 1,688 verified decision-maker contacts tracked across these 285 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.
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