Air conditioning systems are devices that help cool and dehumidify indoor spaces, making them more comfortable during hot weather. They work by removing heat and moisture from the air, using a refrigerant that absorbs heat and then releases it outside. Common types of air conditioning systems include central air conditioning, window units, and portable air conditioners. These systems not only provide relief from heat but also improve indoor air quality by filtering out dust and allergens. Regular maintenance, such as changing filters and cleaning coils, is essential to keep air conditioning systems running efficiently and prolong their lifespan.