Housing HVACHVAC (heating, ventilation, and air conditioning) is a combination of services dedicated to providing comfort indoors by improving the quality of air in homes or other residential spaces. It includes controlling temperatures, humidity levels, air circulation, and air purification. HVAC systems make use of ductwork and vents to circulate air, as well as temperature and humidity control devices such as thermostats. HVAC is an important element of home design in order to create comfortable living conditions while conserving energy and promoting cost savings. With efficient HVAC systems, homeowners can reduce their carbon footprint while also enjoying healthier indoor air quality.