Central air conditioning provides several benefits for modern homes and buildings. Central air conditioning allows for consistent, controlled cooling throughout an entire structure. With ductwork running through walls, ceilings, and floors, central air can cool multiple rooms simultaneously for uniform temperatures regardless of outdoor conditions. Central systems also filter out dust, pollen, and other allergens from circulating air. Modern central air units offer programmable thermostats for customized cooling based on time of day and occupancy schedules.