What Keller Lufttechnik AG does

Keller Lufttechnik AG is the Swiss subsidiary of the German family-owned industrial air-extraction group Keller Lufttechnik GmbH + Co. KG, headquartered in Kirchheim unter Teck, Germany and founded in 1903. The company engineers individual extraction solutions for industrial manufacturing environments, combining application-specific capture elements (suction arms, tables, hoods, hoses) with a broad separation technology portfolio spanning dry separators (VARIO, JET-SET, PT-Filter, L-CUT, PCF-1, TR-1), wet separators (HydronPlus, VDN Venturi), coolant-mist and oil-mist separators (ENA, AERO, eLine), and ambient filtration units (AmbiTower, AmbiWall, FlexiCube). Its proprietary Pro-series of ATEX 114-certified safety components — ProFlapIII back-pressure flaps, ProSens ignition-source monitoring, ProVent and the patented ProPipePlus flameless pressure relief, and ProFlow air-flow monitoring — together with an in-house dust-explosion testing laboratory, position the firm as a specialist in explosion-protected extraction for combustible dusts, including aluminum.

The business model is a hybrid of capital-equipment sales and recurring aftermarket revenue. One-time system sales (custom-configured dry/wet/electrostatic separators plus ancillary equipment) address metalworking, plastics processing, woodworking, chemical, pharmaceutical, ceramics, and surface-finishing customers. Recurring revenue derives from proprietary KLR high-performance filter consumables, scheduled inspections, duct cleaning, and the PREMOS digital predictive-monitoring service; fee-for-service dust analysis (KSt value, pmax, ignition parameters) supports ATEX 137 documentation work. Distribution is purely enterprise field sales with no e-commerce self-serve channel: a direct German field force and wholly-owned subsidiaries in Switzerland, the USA, and China are complemented by regional distribution partners across 20+ countries. Pricing is opaque and project-based, with German customers able to access BAFA subsidies of up to 40% on qualifying systems, which materially affects deal economics.

Keller Lufttechnik operates as a privately held GmbH + Co. KG under family ownership managed by co-Managing Directors Frank Keller and Ann-Cathrin Keller, with no disclosed outside equity, no funding history, and no public revenue reporting. The group carries ISO 9001, ISO 14001, ISO 50001, and DIN EN ISO 3834-2 certifications and holds IFA certification for its KLR-bran filter elements. Customer references include Festo, Aurora, Emil-Arnold, Haas, and Sandvik Tooling Supply across multiple process applications.

Name

Keller Lufttechnik AG

Legal name

Keller Lufttechnik GmbH + Co. KG

Website

https://keller-lufttechnik.de

Company type

Private

Founded year

1903

Operating status

Operating

Headcount range

251–500 employees

Short description

Keller Lufttechnik AG is the Swiss subsidiary of a 1903-founded, family-owned German manufacturer of custom industrial air extraction, filtration, and ATEX-certified explosion protection systems for manufacturing customers in metalworking, plastics, woodworking, chemicals, and pharmaceuticals across 20+ countries.

Ownership category

akta.pro rank

Product category

Industrial Air Extraction and Filtration Systems

NAICS

Industrial and Commercial Fan and Blower and Air Purification Equipment Manufacturing (333413)

SIC

Industrial & Commercial Fans & Blowers & Air Purifing Equip (3564)

akta.pro primary industry

Dust Collection & Air Filtration Equipment (Industrial) (IMAHALAF)

akta.pro secondary industries

Emission Control & Scrubbing Equipment (Scrubbers, Dust Collectors, Catalytic Systems) (IMAHAEAK), Air Quality & Filtration Equipment (IAQ) (IMAHAKAI), Special Hazard Fire Suppression Systems (Clean Agent/Foam/CO2/Kitchen Hood) (IMAIAJAE)

Keywords

• Industrial air extraction
• Dust and fume filtration
• Explosion protection systems
• Process air cleaning
• ATEX-compliant separators

Headquarters

HQ city

Saint Gallen

HQ country

Switzerland

HQ region

Europe

Offices9 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Extraction System Equipment Sales: One-time capital equipment sales of complete extraction and filtration systems (dry separators, wet separators, mist separators, ambient filtration units) along with individual components (suction arms, tables, hoods, hoses, fans). Customers are industrial manufacturing operations requiring process air extraction and emission control. Systems are tailored to specific applications (welding, grinding, painting, metalworking, plastics processing).
2. Spare Parts, Filters and Consumables: Replacement filters (KLR-Filter high-performance filter elements) and accessories for installed extraction systems. Recurring revenue from filter replacements and wearing parts.
3. After-Sales Services: Scheduled equipment inspections, predictive monitoring service (PREMOS), duct cleaning, and field fan balancing. Services ensure operational continuity and longevity of installed extraction systems.
4. Dust Analysis / Explosion Parameter Testing: Fee-based dust analysis services to determine explosion technical parameters (KSt value, pmax, minimum ignition temperature, minimum ignition energy) required for ATEX-compliant explosion protection documentation. Four service packages from clarification to full design of protective measures.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels7 records

Core offering

Keller Lufttechnik designs, manufactures and supplies industrial air extraction and filtration systems that capture airborne contaminants (dust, fumes, oil mist, vapours) at source and separate them using dry, wet, electrostatic and coolant-mist separator technology. The offering bundles proprietary ATEX-certified explosion protection components (ProFlap III, ProSens, ProVent, ProPipePlus, ProFlow) with custom-engineered systems, complemented by KLR filter consumables, in-house dust analysis/explosion testing services, and the PREMOS predictive monitoring after-sales service.

Product overview

Keller Lufttechnik offers a comprehensive portfolio of industrial extraction and air filtration systems designed for clean air in production environments. The core product line includes multiple dry separators (VARIO, JET-SET, PT-Filter, L-CUT, PCF-1), wet separators (HydronPlus, VDN Venturi), mist separators (AERO, ENA, eLine), and mobile/workstation solutions (AmbiTower, AmbiWall, FlexiCube, Work booths). The portfolio integrates complementary safety components for ATEX-compliant explosion protection including ProFlap III back pressure flaps, ProSens ignition monitoring, ProVent and ProPipePlus flameless pressure relief systems, and ProFlow air flow monitoring. Add-on modules like ProTERM Evo for heat recovery and ProFix volume flow regulators enhance energy efficiency. The company also provides supporting services including dust analysis for explosion parameter determination, the PREMOS predictive monitoring service, and comprehensive filter element consumables (KLR-Filter). Specialized application systems address specific processes such as CLEACOM for compounding and RECLAIM for wet painting.

Differentiator

Problem solved

Functional benefit

Products and services

• VARIO dry separator Dry separator for highly effective, energy-efficient dry separation of fine, free-flowing industrial dust, for industrial manufacturing operations.
• JET-SET Dry separator for the separation of heavy-volume fine dust particles in industrial applications.
• PT-Filter units Dry separator units for separation of fine dust particles in industrial process air.
• L-CUT Filtration and separation system for combustible dusts from thermal processes, designed for hazard-free operation.
• TR-1 single separator Single separator for explosive dusts from dry processes or MQL, extracted directly at the machine and safely separated; available with ProSens ignition source monitoring.
• HydronPlus Compact wet separator for separation and cleaning of process exhaust air generated during brushing, blasting and grinding processes.
• VDN Venturi wet scrubber Wet scrubber for combustible, explosive, humid and adhesive dusts.
• ENA coolant mist separator Coolant mist separator for reliable extraction and filtering of coolant aerosols.
• AERO oil mist separator Oil mist separator for reliable separation and filtering of emissions from metal processing operations.
• eLine electrostatic separator Electrostatic separator for efficient separation of adhesive, highly viscous aerosols from process exhaust air.
• PCF-1 dry separator Dry separator for containment applications handling highly reactive, explosive dusts and hybrid gas-dust-air mixtures with maximum safety.
• AmbiTower ambient filtration unit Indirect collection and removal of fine dry dust and welding fumes to protect the workplace environment and adhere to limit values.
• AmbiWall ambient filtration unit Portable and flexible standalone add-on solution to an existing filtration system for workplace air cleaning.
• FlexiCube Compact filtration unit with intuitive operation for versatile use at individual workstations with low dust and fume loads.
• Keller work booths Workstations for grinding, shot blasting, welding and similar processes that create dust during manual and mechanical treatment.
• Pre-separators Pre-separators for capturing and discharging coarse and combustible particles, protecting downstream dust collectors and extending service life.
• ProTERM Evo heat recovery system Heat recovery add-on for extraction systems, exploiting heat energy from process exhaust air to save heating costs.
• ProFix volume flow regulator Volume flow regulator add-on for energy savings during cutting processes.
• ProFlap III back pressure flap ATEX 114-certified back pressure flap for explosion decoupling inside connected ductwork, protecting separators from explosion pressure and flame transfer. Approved for organic and inorganic dust explosions.
• ProSens ignition source monitoring Spark detection and ignition source monitoring system for suction air ducts, suitable for organic and metal dusts including aluminium processing with MQL. Triggers PLC to prevent pending filter cleaning cycles.
• ProVent flameless pressure relief Flameless explosion pressure relief system for organic dusts, enabling indoor installation of dust separators without a designated protective zone.
• ProPipePlus flameless pressure relief for metal dusts Patented flameless explosion pressure relief system for metal dusts (including aluminium) with a patented flame trap and dust retention mechanism in stainless steel, allowing indoor installation without a safety distance.
• ProFlow air flow monitoring Volumetric air flow monitoring system for individual machines, triggering an alarm when nominal volume flow is not achieved to prevent explosive atmospheres and caked deposits.
• PREMOS predictive monitoring service Digital monitoring service for extraction systems that automatically warns operators before faults become critical, eliminating manual inspection rounds and enabling digital upgrade of existing plants.
• KLR-Filter high-performance filter elements High-performance replacement filter elements for separating a variety of process emissions; IFA-certified KLR-bran variants available for hazardous workplace air quality applications.
• Staubuntersuchung dust analysis service Fee-based service packages for explosion risk assessment, including determination of KSt value, pmax, minimum ignition temperature and minimum ignition energy, design of constructive explosion protection measures, and mixing ratios for inertisation. Based on ATEX 137 requirements with standard 10 working day turnaround.
• CLEACOM application system Established 24/7 separation technology for dust and fume generated during plastics compounding processes.
• RECLAIM application system Fully automated filtration technology for wet painting processes, separating overspray and contaminants.
• Q-Box explosion protection component Component used with VARIO dry separators for explosion protection applications.

Quantifiable outcome

• BAFA subsidies of up to 40% available for qualifying air extraction systems in Germany
• +1 more outcomes

Named customers6 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

13 partnerships are on record, tiered core and minor.

• Microsoft CorporationcoreTechnology or IntegrationKeller Lufttechnik uses Microsoft Teams for video conferencing, online meetings, and web conferences between employees and with customers, prospects, and third parties. Data processing is governed by Keller Lufttechnik as the responsible entity; Microsoft Ireland acts as data processor. EU data storage is maintained, though data routing through servers outside the EU may occur for participants in third countries.
• Facebook Ireland Ltd. / Meta PlatformsminorGTM or Marketing PartnerKeller Lufttechnik operates a Facebook fan page (facebook.com/KellerLufttechnik) for customer communication and engagement. Meta Pixel is implemented on the website for conversion measurement and audience tracking. Joint controller arrangement exists for Insights data under EU GDPR Art. 26, with a controller addendum in place. Data transfers to the USA are based on standard contractual clauses.
• Google Ireland LimitedminorGTM or Marketing PartnerGoogle Ads is used for online advertising with keyword targeting and audience-based ad delivery. Google Conversion Tracking measures ad effectiveness. Google Ads data transfers to the USA are covered by standard contractual clauses. Google Analytics equivalent functionality is provided by Matomo (self-hosted).
• Eberspächer Environmental Solutions GmbHcoreChannel Partner/ Reseller/ DistributorEberspächer Environmental Solutions GmbH (Kirchheim unter Teck, Germany) serves as the primary sales representative for Austria (excluding Vorarlberg) for Keller Lufttechnik products. Contact: Mario Eberspächer.
• LUKSAL Ltd.coreChannel Partner/ Reseller/ DistributorLUKSAL Ltd. (Northampton, UK) is the sales and distribution partner for Keller Lufttechnik in Great Britain. Handles local customer engagement and product distribution in the UK market.
• Lybover AIR (Keller Benelux C.V.)coreChannel Partner/ Reseller/ DistributorLybover AIR / Keller Benelux C.V. (Waregem, Belgium) serves as the sales partner for Belgium, Netherlands, and Luxembourg. Also represents Keller France Sarl for the French market.
• DAIICHI JITSUGYO CO.,LTD.coreChannel Partner/ Reseller/ DistributorDAIICHI JITSUGYO CO.,LTD. (Tokyo, Japan) is the distribution partner for Keller Lufttechnik in Japan. Contact: Ryohei Morinaga.
• Innovent Engineering Group Pty Ltd.coreChannel Partner/ Reseller/ DistributorInnovent Engineering Group Pty Ltd. (Forrestfield, Western Australia) is the distribution partner for Keller Lufttechnik in Australia. Contact: Brian Hooker.
• VIKING (1978) Ltd.coreChannel Partner/ Reseller/ DistributorVIKING (1978) Ltd. (Edmonton, Te Atatū South, Auckland, New Zealand) is the distribution partner for Keller Lufttechnik in New Zealand. Contact: Lester.
• Kolář K+K s.r.o.coreChannel Partner/ Reseller/ DistributorKolář K+K s.r.o. (Prague, Czech Republic) is the sales representative for Keller Lufttechnik in the Czech Republic. Contact: Boris.
• FILTER 2000 SLcoreChannel Partner/ Reseller/ DistributorFILTER 2000 SL (Boadilla del Monte, Madrid, Spain) is the sales partner for Keller Lufttechnik in Spain.
• E.B.E. Pty Ltd.coreChannel Partner/ Reseller/ DistributorE.B.E. Pty Ltd. (Cape Town, South Africa) is the sales representative for Keller Lufttechnik in South Africa. Contact: Rainer Kloos.
• A.E.R. S.a.r.l.coreChannel Partner/ Reseller/ DistributorA.E.R. S.a.r.l. (Cugnaux, France) is a sales partner for Keller Lufttechnik in France, in addition to Keller France Sarl / Lybover AIR.

Scale indicators2 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• RoboVent: US-based manufacturer of industrial air filtration and dust collection systems for metalworking, welding, and manufacturing. Comparable product mix focused on dust/fume extraction for industrial operators.
• Camfil: Swedish-founded global manufacturer of clean air solutions including industrial dust/mist collectors and air filters. Closely matches Keller's product scope in air purification and filtration for industrial environments.
• Imperial Systems: US manufacturer specializing in industrial dust collection and air filtration systems for metalworking, welding, and process industries. Comparable niche product offering and customer overlap with Keller Lufttechnik.
• Plymovent: Netherlands-based specialist in industrial fume and dust extraction, particularly for welding and metalworking applications. Directly comparable niche focus on process air capture at industrial workstations.
• Nederman Holding: Swedish-based global leader in industrial air filtration, fume extraction, and dust collection. Directly comparable product categories (fume/dust extraction, mist collection, filters and consumables) and enterprise manufacturing customer base overlap heavily with Keller's.
• AAF Flanders (American Air Filter): Major industrial air filtration manufacturer with dust collectors, mist collectors, and HEPA filtration lines serving metalworking, manufacturing, and process industries — a directly overlapping offering to Keller Lufttechnik.

Broad incumbents

• Freudenberg Filtration Technologies: Division of Freudenberg Group manufacturing industrial air and liquid filtration products including dust collection elements and air purification systems. Comparable industrial customer base with broader portfolio.
• Mann+Hummel: German-headquartered global filtration specialist with industrial air filtration product lines serving manufacturing customers. Adjacent competitor at much larger scale with overlapping metalworking and process industry exposure.
• Donaldson Company: US-listed global filtration giant with industrial dust collection (Torit brand) and gas filtration lines directly overlapping Keller's portfolio. Operates at much larger scale across many geographies, serving overlapping industrial manufacturing customers.

Emerging players

• Eclipse Automation / Absaugwerk: Smaller German and European regional specialists in industrial extraction and air filtration. Operate in adjacent or overlapping niches to Keller with more limited geographic and product breadth.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks7 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/KellerLufttechnik
• LinkedInlinkedin.com/company/keller-lufttechnik-gmbh

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Subsidiaries3 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Keller Lufttechnik AG