The long side size of the air duct(round air duct diameter), and the air duct work pressure depands: Low pressure systems: P 500 pa or less medium voltage system: In 500 pa1500pa middle and low pressure,take thickness of the galvanized iron air duct as example: Long side size of air duct b ≤320 mm: 0.5 mm320
Glass wool air duct's size (450 * 500 pix) glass wool board is packaged with external aluminum foil surface, and polymer coating on the inner surface;second, inner surface is coining aluminum foil fabrics, which is corrosion and rust resistance, the first paper base aluminium foil air duct has poor protective strength, unstable quality, high humidity, external surface is easy for deliquescing, fiber structure, glass fiber will fall down, inner coated with antibacterial layer, which is easy for invaliding, and it's easy for breeding bacteria and is harmful to human's body.
Generally specifications of glass wool as airconditioner air duct include: 48 k - 30 mm single folder tendons aluminum foil, cost depends on the brand you use, i recommend three good brands to you: Owens Corning/ isover/Shanghai Huali. price is about 400-500 yuan/cubic.
