HVAC is an acronym that stands for "heating, ventilating and air conditioning." HVAC systems are used for climate control, particularly temperature and humidity levels. HVAC systems come in a broad range of sizes and complexity. The most commonly used types of HVAC systems are listed here.
Single zone HVAC systems serve only one area of a building. All of the rooms in this area must have similar cooling and heating vents that are regulated by a common thermostat.
Multiple zone HVAC systems provide more than one area of a building with cooling and heat. Each zone can have a different temperature regulated with separate thermostats.
Constant volume HVAC systems are designed to provide each zone with a constant volume of airflow. Temperatures are changed by switching the HVAC unit on or off.
Variable volume HVAC systems allow users to vary the amount of cooled or heated air delivered to each zone. This type of HVAC system tends to overcool or overheat areas.
Radiant HVAC systems typically run cold or hot water through metal pipes to cool or heat the air before it is released into the room. These systems are old-fashioned and mostly used in older homes and buildings.