Table of Contents
Is duct board safe to use?
Environmental Protection Agency (EPA) has classified it as an animal carcinogen. Numerous IAQ case studies have shown that fiberglass duct liner, combined with dust, dirt and moisture, is a very good medium for microbial growth (examples: mold, fungus, Legionella bacteria).
Can you use insulation board for ductwork?
Rigid foam board ducts can be installed during new home construction or a remodeling project. You can build ducts from rigid foam board to serve as the distribution system to circulate heated or cooled air in your house.
Is code for HVAC ducting?
IS 655: Specification for Air Ducts.
What is duct board?
Duct board is a semi-rigid fiberglass insulation material often used for residential or light commercial heating and cooling applications in lieu of metal duct.
Is duct board mold resistant?
If your home or building has fiberglass air ducts, also known duct board or fiberboard, Mold Resistant Duct Coating may be necessary after cleaning and decontamination of the air duct system. The fiberglass acts a sponge for dust, dirt and even mold. …
How do you make a Ductboard plenum?
Slit the foil vapor barrier extending beyond the edges of the duct board with a duct board knife. Fold the ends of the foil onto the outside of the duct board. Staple the foil to the duct board. Tape the flaps down with foil tape to complete the duct board plenum.
What is cool duct?
Premium Performance Pre–insulated Ductwork The Kingspan KoolDuct System is an advanced and innovative pre–insulated HVAC ductwork system which offers benefits such as reduced installation time, low weight, space savings through flush–to–ceiling installation, increased performance and energy efficiency.
Is 655 specification for air ducts?
This standard covers materials and constructional requirements of air ducts used for air conditioning and ventilation system (including gas exhausting system).
How long can you run flex duct?
5 feet
1 Length Limitation. Factory-made flexible air ducts and connectors shall be not more than 5 feet (1524 mm) in length and shall not be used in lieu of rigid elbows or fittings. That’s a pretty strong limitation.
Is duct board fire resistant?
Owens Corning QuietR™ Duct Board is a rigid, resin bonded fibrous glass board with a tough, damage-resistant, flame retardant, reinforced aluminum foil (FRK) facing.
Are there any amended sections for ducts in this chapter?
Heads up : There are no amended sections in this chapter. Duct systems used for the movement of air in air-conditioning, heating, ventilating and exhaust systems shall conform to the provisions of this chapter except as otherwise specified in Chapters 5 and 7.
What are the construction standards for single ductwork?
DUCT CONSTRUCTION MINIMUM SHEET METAL THICKNESS FOR SINGLE DWELLING UNITS a a. Ductwork that exceeds 20 inches by dimension or exceeds a pressure of 1 inch water gage shall be constructed in accordance with SMACNA HVAC Duct Construction Standards—Metal and Flexible. M1601.1.2Underground duct systems.
What is the maximum design temperature for HVAC ducts?
The maximum design temperature for systems utilizing plastic duct and fittings shall be 150°F (66°C). Metal ducts shall be protected from corrosion in an approved manner or shall be completely encased in concrete not less than 2 inches (51 mm) thick.
What is the minimum thickness of concrete for ductwork?
Metal ducts shall be protected from corrosion in an approved manner or shall be completely encased in concrete not less than 2 inches (51 mm) thick. Nonmetallic ducts shall be installed in accordance with the manufacturer’s instructions.