More about the Pre-insulated duct-1

More about the Pre-insulated duct-1

Manufacture of Pre-insulated ducts: Compared with other traditional methods such as GI steel duct, this method has obvious advantages:

More accurate.

Strength and quality.

Reduce load loss.

Better completion.

Reduce waste

INSULATION FOR FIBERGLASS DUCTS

In addition to helping maintain a constant temperature, fiberglass – as an insulation material – is inorganic and therefore does not promote mold growth or act as a nutrient for mold growth. It is also a safe biosoluble material. More than 20 studies carried out at universities and prestigious laboratories, such as the World Health Organization, have examined the concentrations of fiberglass and other synthetic vitreous fibers (SVF) in residential and commercial buildings and have consistently found that they do not contribute significantly to indoor air pollution, thereby contradicting previous research claims.

There are four types of fiberglass insulation commonly used in duct applications:

Fiberglass duct liner is applied to the inside of a rectangular sheet metal duct and is designed to control heat loss or gain through the duct walls, assist with quiet air distribution, and control condensation . Fiberglass duct liners are resistant to mold growth and fiber erosion in accordance with industry standards and prevent the distribution of mold or airborne fiberglass. With mat-lined draft surfaces, duct liners will resist damage during installation, maintenance, and cleaning. They are manufactured in both roll and plate form, and are available in a variety of densities and thicknesses.

Fiberglass Duct Wrap is a heavy-duty insulation blanket, with a vapor retarder coating, made to fit comfortably over rectangular, spiral, flat oval, or irregularly shaped surfaces. It can be easily cut and fitted for a clean, thermally efficient installation and comes in various thicknesses and densities.

Fiberglass Duct Board is a 1- to 2-inch-thick rigid board (manufactured from resin-bonded inorganic glass fibers) used for the fabrication of fiberglass ductwork. For commercial applications that require thermal insulation, condensation control, and acoustic control, fiberglass duct board provides a low-cost, efficient alternative to sheet metal. Since the insulation is built into the duct board, fiberglass ductwork does not require as many manufacturing steps as insulated sheet metal ductwork. The exterior surface of duct boards should offer a factory-applied aluminum-reinforced air barrier and vapor retarder, which minimizes air leakage and moisture buildup.

Commercial fiberglass mat – available uncoated, or coated with FSK or ASJ – is applied to the exterior of round, rectangular, oval, or irregular-shaped ducts, plenums, refrigerators, and other HVAC equipment. From flexible to rigid, commercial sheet products are used to reduce heat loss or gain through duct walls, plenums, and equipment.

When properly installed in conjunction with an efficient HVAC system, each of these types of duct insulation can have a profound impact on improving indoor air quality. In addition to moisture and mold control, duct insulation also helps improve the quality of the indoor environment in the following two areas: