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eeNation.com  >  Cities  > Texas  > Katy  >  Businesses of Katy  Duct Cleaning/Duct Repair/Duct Service
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Ducts are still most often made of galvanized steel. Various fittings allow transitioning between the various shapes and sizes. A "tee" connection, for example, is where the air flow can be divided into two or more downstream branches. Many factory-made shapes and sizes are available but galvanized steel can easily be cut and bent to form additional shapes when required. Steel ducts are commonly wrapped or lined with fiberglass thermal insulation, both to reduce heat loss or gain through the duct walls and water vapor from condensing on the exterior of the duct when the duct is carrying cooled air. Insulation, particularly duct liner, also reduces duct-borne noise. Both types of insulation reduce 'breakout' noise through the ducts' sidewalls.
 
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Also the fiberglass panels provide built-in thermal insulation and the interior surface absorbs sound, helping to provide quiet operation of the HVAC system. The duct board is formed by sliding a specially-designed knife along the board using a straightedge as a guide; the knife automatically trims out a "valley" with 45 sides; the valley does not quite penetrate the entire depth of the duct board, providing a thin section that acts as a hinge. The duct board can then be folded along the valleys to produce 90 folds, making the rectangular duct shape in the fabricator's desired size. The duct is then closed with staples and special aluminum or similar 'metal-backed' tape. Commonly available duct tape should not be used on air ducts, metal, fiberglass, or otherwise, that are intended for long-term use.
 
 
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Ducts are used in heating, ventilation, and air conditioning (HVAC) to deliver and remove air. These needed airflows include, for example, supply air, return air, and exhaust air. Ducts also deliver, most commonly as part of the supply air, ventilation air. As such, air ducts are one method of ensuring acceptable indoor air quality as well as thermal comfort.

A duct system is often called ductwork. Planning ('laying out'), sizing, optimizing, detailing, and finding the pressure losses through a duct system is called duct design.
Like modern steel food cans, at one time air ducts were often made of tin, like 'tin cans' were made for food. Tin is more corrosion resistant than plain steel, but is also more expensive. With improvements in mild steel production, and its galvanization to resist rust, steel 'sheet metal' has replaced tin in ducts as well as food cans. However, the term tin-knocker is still used in practice to describe sheet metal duct installers.
Businesses will compete to offer the best service at the best prices! Receive information and quotes from services in your area and compare prices today!...............................................................................FREE ESTIMATE
Businesses will compete to offer the best service at the best prices! Receive information and quotes from services in your area and compare prices today!...............................................................................FREE ESTIMATE
More Duct Services of Katy!  >  Click Here!
Duct Services wanted! - List your business for free!
Duct Services wanted! - List your business for free!
More Duct Services of Katy!  >  Click Here!