Industrial & Commercial Chillers — Asbestos Exposure Crosswalk
What This Equipment Is
A chiller produces chilled water for distribution to building cooling coils or process equipment. Industrial / commercial chillers come in several design categories:
- Centrifugal chillers — turbo-compressors driven by electric motors or steam turbines; widely used in large commercial / institutional cooling plants
- Absorption chillers — driven by heat (steam or hot water) rather than mechanical compression; popular in hospital and large institutional applications where waste steam is available
- Reciprocating chillers — smaller-tonnage piston-compressor designs
- Screw chillers — medium-tonnage rotary-screw designs
Chillers operate at chilled-water temperatures (40–45°F) and reject heat through condenser water (typically going to a cooling tower — see Cooling Towers). The evaporator and condenser are shell-and-tube heat exchangers (see Heat Exchangers); the chiller shell is insulated; the connected piping is insulated.
Asbestos Products Historically Used Around Chillers
| Product Category | Where on the Chiller | Notes |
|---|---|---|
| Cold-side insulation | Chiller shell, chilled-water piping | Specialty cold-line insulation |
| Block insulation | Evaporator and condenser shells | Calcium silicate, magnesia |
| Pipe covering | Chilled water, condenser water, refrigerant piping | Magnesia, calcium silicate |
| Tube-bundle head gaskets | Evaporator and condenser flanged heads | Asbestos sheet gasket material |
| Motor-winding components | Electric drive motors on centrifugal chillers | Asbestos paper / millboard — see Motor Windings |
| Steam-valve packing | Steam-supply valves on absorption chillers | Braided asbestos rope packing |
| Gaskets | All flanged piping connections | Asbestos sheet gasket material |
Why Chiller Work Was an Asbestos Exposure Pathway
Chiller maintenance is recurring. Tube-bundle cleaning during summer-off seasonal shutdowns, motor rebuilds on centrifugal-chiller drive motors (see Motor Windings), absorption-chiller tube-bundle work, and chiller-modernization projects all disturb asbestos-bearing components in the chiller and surrounding piping.
Major chiller-modernization projects — replacing 1960s–1980s vintage equipment with high-efficiency modern chillers — generate concentrated disturbance of legacy asbestos insulation and gasket components.
Manufacturers Named in Chiller-Related Litigation
- Carrier Corporation — chiller OEM named in installation/maintenance claims
- Trane Company — chiller OEM
- York International — chiller OEM
- McQuay — chiller OEM
- Worthington / Westinghouse / GE — large-tonnage centrifugal chiller OEMs
- Johns-Manville — pipe covering, block insulation
- Owens-Corning / Fibreboard — insulation
- Armstrong World Industries — calcium silicate insulation
- Garlock Sealing Technologies — gaskets
- A.W. Chesterton — packing
Documented Product References
Images sourced from publicly available product-identification reference materials. Inclusion does not constitute a finding of liability against any company.
Trust Funds That May Apply
- Manville Personal Injury Settlement Trust
- Owens-Corning / Fibreboard Asbestos PI Trust
- Armstrong World Industries Asbestos PI Settlement Trust
- Garlock Sealing Technologies LLC Asbestos PI Trust
Trades Most Exposed at Chiller Work
Refrigeration mechanics (commercial / institutional HVAC specialty), industrial-plant mechanics, building engineers, contract chiller-rebuild and modernization crews, electricians performing motor work on centrifugal chillers.
Jobsites in the Network
- Central cooling plants at every Missouri hospital, commercial high-rise, and large institutional building with pre-1990 chiller installations
- See companion pages: Cooling Towers, Brine Chillers, Ammonia Compressors, Heat Exchangers, Motor Windings
Compiled from publicly filed asbestos litigation, EPA / OSHA records on commercial HVAC abatement, and industry-publication histories. Product and company references reflect what has been alleged or documented in publicly filed litigation. This page does not constitute a finding of liability against any company. Not legal advice; consult a licensed attorney about your specific situation.