Ducts, or ducts, are passages or tubes that are typically part of a ventilation system and are used to transport air throughout a building. An example of a simple primary duct is a chimney, which is used to expel smoke outside. Ducts are also used in heating, ventilation, and air conditioning (HVAC) systems to supply and remove air. The necessary air flows include, for example, supply air, return air and exhaust air.
Ducts usually also provide ventilation air as part of the supply air. As such, air ducts are a method for ensuring acceptable indoor air quality as well as thermal comfort. Low-profile PVC ducting has been developed as a cost-effective alternative to low-profile steel ducting. At the bottom of the battery, a cover allows you to move from a large ordinary round or rectangular duct to a thin wall-mounted duct.
A thorough cleaning of the ducts performed by a professional duct cleaner will remove dust, cobwebs, dirt, pet hair, rodent hair and excrement, paper clips, calcium deposits, children's toys, and anything else that may accumulate inside. Expiration dates vary: metal ducts tend to last longer than flexible ducts because the metal is stiffer and its surface allows air to slide, unlike the coil that surrounds flexible ducts. Good HVAC contractors calculate airflow, determine the types of ductwork they must use to meet house requirements, and outline the air distribution system to properly position equipment and size ducts. Fabric ducts tend to weigh less than other conventional ducts and, therefore, put less pressure on the building structure. A more common type of duct sealant is a water-based paste that is brushed off or sometimes sprayed onto joints when the duct is built.
The Environmental Protection Agency (EPA) states that if no one in your household has allergies or unexplained symptoms or illnesses and if, after a visual inspection of the inside of the ducts, you don't see any sign that your air ducts are contaminated with large deposits of dust or mold (no musty smell or visible mold growth), you probably don't need to clean your air ducts. Before sealing the ducts, it is imperative to ensure the total external static pressure of the ducts and to check whether the equipment meets the equipment manufacturer's specifications. The duct plate can then be folded along the slot to create 90° folds, so that the duct has the rectangular shape of the size desired by the manufacturer. Fabric ducts, which are usually made of polyester, can provide a more uniform distribution and mix of air conditioning in a given space than a conventional duct system. Some flexible duct markets prefer to avoid the use of flexible ducting in the air return parts of HVAC systems; however, flexible ducts can tolerate moderate negative pressures.
A probe connected to the engine is installed in the duct and detects smoke, either in the air that has been extracted from or supplied to a room, or at any other point in the duct. To use flexible ducting in a system, be sure to tighten the duct well to obtain the entire internal diameter. A good HVAC specialist will avoid unnecessary bending when installing the HVAC duct system and, whenever possible, will opt for smaller, tree-branch-like ducts. Nowadays, a sheet metal fabrication workshop usually makes the duct out of galvanized steel and insulates it with an envelope before installation.
