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A HVAC system is a type of air conditioning that draws air through ducts and heats it before pushing it out. In the winter, it also helps to cool a home. To do this, the HVAC system uses a refrigerant to cool a fluid, called refrigerant gas, and then sends it to evaporator coils inside a home. The evaporator coils absorb heat from the indoor air and push it outside.

The efficiency of HVAC systems can be improved in several ways. For example, in cold climates, some systems use economizer mode, which allows for a reduction in energy consumption. Essentially, an economizer opens the outside air damper and closes the return air damper, thus allowing fresh outside air to supply the HVAC system. The outdoor air can be cooler than the desired cool air, which enables the HVAC system to meet cooling demand without the mechanical supply of chilled water.

HVAC systems are an important part of homes, office buildings, and medium to large industrial facilities. They also play a vital role in cars, marine environments, and other places where fresh air is needed. Homeowners can do simple maintenance like changing filters, but most maintenance needs should be left to the professionals. For full installation and repairs, a licensed contractor should be hired. There are several different skills and special equipment required for HVAC work, so it is important to have someone who is qualified to complete the work.

In addition to providing fresh air, HVAC also helps regulate the indoor temperature of the home. It moves air throughout the house via a network of ducts or insulated mini-ducts. Some modern systems don’t even require ducts and can use inconspicuous vents to do so.

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