COSMOS AIRCON MUMBAI # BEST AC DEALER # AC DEALER NEAR ME # AFFORDABLE SERVICES # SITC COSMOS AIRCON # AMC COSMOS AIRCON # HVAC, mechanical system used to control the temperature, humidity, and movement of air throughout a building or other indoor space. HVAC systems are used extensively in homes and businesses for comfort as well as safety from extreme weather or the effects of poor air circulation. They are also commonly used in industrial settings to protect sensitive products or equipment from damage caused by temperature or humidity. HVAC systems combine the related functions of heating, ventilation, and air-conditioning, the last of which includes both cooling air and controlling its humidity. Each of these functions can be approached in a variety of ways. Modern HVAC systems typically include a central air-conditioning unit to cool and dehumidify air, a humidifier to add humidity as needed, a furnace to warm air when desired, and ducts and fans to move fresh air into the space and vent old air and exhaust out of it. Some or all of these elements may be controlled by a thermostat, which measures the temperature in a space and relays commands to the HVAC system to cool or heat the air to reach the desired temperature.