Return air grilles connect to ducts in heating and cooling systems, covered by adjustable grilles that prevent large objects from entering and filter smaller particulate materials. They are available through catalogs, hardware stores, and duct system manufacturers. It is important to periodically clean the extract air grille and filter for safety and system efficiency.
A return air grille is a connection to ducts that allows air to return to a heating and cooling system. The return air openings are usually covered by a grille which performs a number of different functions. A variety of companies make covers for these openings that people can use to replace existing covers or install them with a brand new system. These products are available through catalogs, hardware and contractor stores, as well as duct system manufacturers.
In a heating and cooling system, the central furnace or air conditioner pushes the air through a system of ducts into the rooms of a structure to control the temperature. It also draws air through the return ducts. The air drawn into the system is heated or cooled as needed and redistributed. Essentially, the system acts like a pump, circulating ambient air through a heating or cooling chamber to create a stable, constant temperature in the facility.
The extract air grille covers a register which allows air to flow into the heating and cooling system. Most grills are adjustable, allowing people to close off a room so the oven can’t extract air. The amount of air allowed through the air grate can also be moderated, for example if people want more cold air pulled from downstairs rooms in the winter and less warm air upstairs pulled through the heater.
The return air grilles also cover the ducts so people don’t have to look at them, and prevent large objects from entering the ducts, where they could get lost and damage the heating and cooling system. A return air grille is often equipped with a filter to trap smaller particulate materials before they have a chance to enter the ducts. This limits the amount of cleaning needed and keeps the system running smoothly, reducing the risk of blockages caused by dust, pet hair and other materials.
A return vent can be placed in the wall or in the floor, depending on the system. It is important to ensure that the extract vents are covered for safety and that the extract air grille is periodically lifted and cleaned, together with the filter, to prevent dirt from entering the heating and cooling system. People who aren’t sure how to do this can consult a heating and cooling professional for advice on maintaining their ductwork to extend the life of their air conditioning system.
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