2007-04-15 03:30:03 · 6 answers · asked by booklvrg77 1 in Home & Garden ➔ Maintenance & Repairs
Generally galvinized steel.
2007-04-15 03:32:51 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Originally, galvanized steel. Of late, I have seen it made of rigid fiberglass in a plastic covering. It is usually round and has a wire coil on the outside of the fiberglass and under the plastic to hold it's shape. The materials may change as the ducts get further from the Heating/AC source.
2007-04-15 10:41:47 · answer #2 · answered by sensible_man 7 · 0⤊ 0⤋
Galvanized sheet metal is the most common material used. Aluminum is sometimes used too. Insulated flex-duct is sometimes used for individual runs (6")... it's easier for one person to install. Duct board is also used (fiberous insulation board covered with foil on one or both sides).
2007-04-15 10:43:42 · answer #3 · answered by weatherization guy 5 · 0⤊ 0⤋
There are several materials used in the construction of ductwork, thin sheet steel is the most common because of its strenght, rigidity and low cost. Aluminum is another and there are several kinds of flexible pipe available with and without insulation and some have quict connects on each end. Application is where the choices start.
2007-04-15 10:39:11 · answer #4 · answered by MT C 6 · 0⤊ 0⤋
having worked in Sheetmetal for over 30yrs, I have made duct work out of galvanized, aluminum, stainless steel, plastic, flex duct, fiberglass duct, etc....any material that is leakproof and conduct air can be used for a/c-heat....good luck....any other questions about air conditioning you can Email me...I will be glad to answer you.....good luck....
2007-04-15 10:44:05 · answer #5 · answered by The Emperor of Ecstasy 5 · 0⤊ 0⤋
Usually galvinized metal. To prevent rust fom moisture!
2007-04-15 10:57:05 · answer #6 · answered by chris j 7 · 0⤊ 0⤋