FURNACE / DUCT INSULATION
Choose from the categories below to see examples and information about these forms of Asbestos.

FURNACE / DUCT INSULATION
Here are some samples of how asbestos-containing materials (ACM) were used to insulate furnaces and ducts. Typically the material used was an asbestos-containing paper. The paper came on an 18″ roll for large areas, and also on a 2″ roll, like a roll of tape. Either the material was sprayed with water and then applied, or an adhesive was applied to the duct or furnace first, and then the paper or tape was applied over the adhesive. In some cases, only the seams of the ducts had the “tape” applied. In other cases, only the seams of the “return” ducts were taped and the entire “supply” duct was totally wrapped with this asbestos-containing material.
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These ducts usually are fed from a forced air “octopus” furnace. These furnaces were very popular and at the time, very cutting-edge. The furnace is usually only insulated on the upper portion (the “head”) where the fan “forces” the air through the duct work.
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ACM "TAPE" ON SEAMS

ACM "TAPE" ON SEAMS

ACM PAPER ON PORTIONS OF DUCT

"OCTOPUS" FURNACE WITH ACM PAPER ON DUCTS

ACM PAPER ON DUCT "FEED" TO UPSTAIRS (BEFORE)

ACM PAPER ON DUCT "FEED" TO UPSTAIRS (AFTER)

ACM PAPER ON DUCT

ACM PAPER ON DUCT REMOVED

DUCT HIDDEN ABOVE PLASTER CEILING

ACM "TAPE" ON SEAMS

ACM "TAPE" ON SEAMS (SURROUNDED BY FIBERGLASS)

ACM PAPER FALLING OFF OF DUCT

ACM PAPER ON 12 IN. DUCT

ACM PAPER INSIDE RETURN AIR PLENUM

ACM "TAPE" ON SEAMS, PAINTED OVER

ACM MATERIAL ON TOP OF FIBERGLASS

ACM PAPER ON DUCT (FRONT) AND SEAMS ONLY (BACK)

ACM PAPER ON DUCT "FEED" TO UPSTAIRS

ACM PAPER TOTALLY COVERING EXTERIOR OF PLENUM (BEFORE)

ACM HIDDEN BETWEEN FIBERGLASS AND CLOTH COVERING

ACM PAPER TOTALLY COVERING EXTERIOR OF PLENUM (AFTER)

ACM HIDDEN BETWEEN FIBERGLASS AND CLOTH COVERING

ACM "OCTOPUS" FURNACE WITH "HEAD" AND DUCT

"OCTOPUS" DUCTS COMPLETELY WRAPPED IN ACM PAPER

ACM "OCTOPUS" FURNACE WITH "HEAD" AND DUCT

"OCTOPUS" DUCTS COMPLETELY WRAPPED IN ACM PAPER


ACM "OCTOPUS" FURNACE WITH "HEAD" AND DUCT
ACM "OCTOPUS" FURNACE WITH "HEAD" AND DUCT

ROLL OF ACM INSULATING PAPER
