Manufacturer: Edwin L. Wiegand Company (Chromalox brand) Headquarters: Pittsburgh, Pennsylvania Founded: 1917 Documented Asbestos Use: Through approximately the early 1980s (consistent with the industry-wide phase-out) Product Categories: Electric heaters, resistance heating elements, and heater assemblies Legal Status: Tier 2 — Named in asbestos litigation; no dedicated bankruptcy trust identified
Company History
The Edwin L. Wiegand Company was founded in 1917 in Pittsburgh, Pennsylvania, by Edwin L. Wiegand, a self-taught engineer who had patented a resistance-heating element embedded in an insulating refractory and enclosed in a metal sheath. The company’s early products included strip heaters used in household appliances, and its heating elements were marketed under the enduring “Chromalox” brand name. Over the following decades the Wiegand Company grew into a major manufacturer of electric heating equipment, producing strip heaters, immersion heaters, duct and space heaters, hot plates, thermostats, and industrial heating systems.
During the mid-twentieth century — roughly the 1930s through the early 1980s — asbestos was widely used as an electrical and thermal insulator in heating equipment across the industry. Because asbestos combined heat resistance with electrical-insulating properties, manufacturers of electric heaters, heating elements, and heater assemblies routinely incorporated asbestos-containing insulation, wiring insulation, gaskets, or refractory materials. According to asbestos litigation records, workers who installed, operated, or maintained electric heating equipment of this era were potentially exposed to asbestos-containing components associated with such products.
The Chromalox line and the Wiegand name have continued in the electric-heating industry through subsequent corporate ownership. This corporate history is relevant to individuals researching exposure history, because successor relationships can affect which legal entities may be named in asbestos-related claims.
Asbestos-Containing Products
The Edwin L. Wiegand Company did not manufacture asbestos as a raw material. According to asbestos litigation records, however, electric heating equipment of the mid-twentieth century commonly incorporated asbestos-containing components, and plaintiffs have alleged that heaters and heating elements of this type contained or were constructed with such materials.
Electrical and thermal insulation was the component most frequently associated with electric heating equipment in litigation. Asbestos was valued as an insulator because it resisted both heat and electrical current. Plaintiffs have alleged that heater assemblies, terminal blocks, and wiring in equipment of this era used asbestos-containing insulation, and that asbestos millboard, cloth, or paper was used to insulate heater housings and adjacent surfaces.
Gaskets and refractory sealing materials used in heater assemblies and enclosures were also identified in court filings involving comparable equipment. According to court filings, the hazard associated with these components was not limited to initial installation: replacement and repair of heating elements and insulation over the working life of the equipment could disturb asbestos-containing materials, and cutting, scraping, or handling deteriorated insulation could generate airborne asbestos fibers.
Documented Naval Service
According to U.S. Navy machinery and equipment records, electric heaters manufactured by the Edwin L. Wiegand Company under the Chromalox brand — including electric heaters used in shipboard ventilation systems — were documented aboard United States Navy vessels, including the aircraft carriers USS Nimitz (CVN-68) and USS Forrestal (CVA-59). This documentation identifies the Wiegand Company as an original-equipment manufacturer (OEM) of shipboard electric heating equipment. Naval electric heaters of this era commonly incorporated asbestos-containing electrical and thermal insulation, and — according to asbestos litigation records — electricians, ventilation and machinery personnel, and shipyard workers who installed, operated, or repaired this equipment may have encountered asbestos-containing components during service and maintenance.
Occupational Exposure
According to asbestos litigation records, exposure to asbestos-containing components associated with electric heating equipment of this type occurred across a range of industrial and maritime occupations. The following worker categories appear with regularity in asbestos claims involving comparable equipment:
Electricians and Electrical Workers who installed, wired, and maintained electric heaters and heating elements frequently handled asbestos-containing insulation, wiring, and terminal materials as part of routine work.
Navy Electricians, Ventilation Personnel, and Shipyard Workers who installed or serviced shipboard electric heaters — including heaters used in ventilation ducting and machinery spaces — are documented in asbestos litigation records involving marine electrical equipment.
Industrial Maintenance and HVAC Workers who repaired or replaced heating elements, duct heaters, and space heaters in commercial and industrial facilities may have encountered asbestos-containing insulation during element replacement and repair.
Bystander and Secondary Exposure — Workers in proximity to those cutting or replacing asbestos-containing heater insulation could also be exposed, as fibers released during such work can travel through a work area.
The period of heaviest documented exposure corresponds approximately to the 1930s through the early 1980s, consistent with the broader industrial use of asbestos before regulatory action by OSHA and the EPA prompted a significant reduction in asbestos use. Use of asbestos-containing insulation in electric heating equipment of this class is understood to have been phased out industry-wide by approximately the early 1980s.
It should be noted that the latency period for asbestos-related diseases — including mesothelioma, asbestosis, and asbestos-related lung cancer — is typically between 20 and 50 years following initial exposure.
Trust Fund and Legal Status
The Edwin L. Wiegand Company (Chromalox) is classified as a Tier 2 manufacturer for purposes of this reference site. This designation means the company has been named in asbestos-related personal injury litigation, but no dedicated asbestos bankruptcy trust fund has been identified for it. Accordingly, claims involving Wiegand or Chromalox heating equipment would be pursued through direct civil litigation rather than a trust claims process.
Plaintiffs have alleged in asbestos cases that electric heating equipment of this type incorporated asbestos-containing insulation and sealing components. Whether and to what degree the company or its successors have faced adverse judgments, settlements, or other litigation outcomes varies by case; this article does not represent any specific outcome as established legal fact.
Because the Wiegand name and Chromalox brand have passed through corporate ownership changes, individuals pursuing legal claims may need to account for corporate succession when identifying appropriate defendants. For individuals also exposed to asbestos-containing products from other manufacturers — a common circumstance in industrial and shipboard environments — separate trust fund claims may be available through those manufacturers’ established asbestos trusts.
Summary: Legal Options for Affected Workers and Families
If you or a family member worked with or around Edwin L. Wiegand or Chromalox electric heaters and heating elements during the 1930s through the early 1980s and has since been diagnosed with mesothelioma, asbestosis, or asbestos-related lung cancer, legal options may be available.
Key points to understand:
- The Wiegand Company (Chromalox) has been named in asbestos litigation but does not appear to operate a dedicated asbestos bankruptcy trust fund. Claims would be pursued through direct civil litigation.
- Corporate succession involving the Chromalox brand may be relevant to identifying proper defendants.
- Workers exposed to multiple asbestos-containing products — as was common aboard Navy ships, in shipyards, and in industrial plants — may be eligible to file claims against multiple responsible parties, including manufacturers with established trust funds.
- The long latency period for asbestos-related disease means that exposure from decades ago can give rise to claims today.
- Documentation of your work history — including employers, ships or job sites, job titles, and any product names you can recall — is valuable when consulting with an attorney and should be preserved.
An attorney specializing in asbestos litigation can review your work history, identify relevant products and manufacturers, and advise on available legal remedies.
This reference article is provided for informational purposes to workers, families, and legal professionals researching asbestos exposure history. It does not constitute legal advice. Product identification and litigation history are drawn from publicly available records and reflect allegations, not findings of liability, which is determined case by case.