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Vermiculite insulation that comes from a particular mine before 1990 is likely to contain asbestos. This is particularly true in the U.S. However, not all types of vermiculite insulation contain asbestos. Since you can't detect the presence of asbestos without special equipment, it's best to assume that the insulation contains the dangerous mineral and to either leave it alone or hire a professional to handle it.

Typical methods for asbestos removal include encapsulation, enclosure, and complete removal.

According to the Environmental Protection Agency (EPA), you should contact the following officials to report a case of asbestos exposure:

• Asbestos subject matter experts in your state 

• EPA regional office

• Toxic Substances Control Act (TSCA) Assistance Information Service Hotline via mail, email, or phone

• EPA’s Asbestos Ombudsman via phone or fax 

No, but it’s common that they do. Gravity furnaces weren’t terribly efficient so wrapping either the ductwork in asbestos, the furnace itself, or both, was something done regularly. This allowed the system to retain more heat. At the time, this greatly enhanced the efficiency of the furnaces but it wasn’t until later that we became aware of just how carcinogenic and dangerous asbestos could be.