Systems for heating, ventilation, and air conditioning are included in the design tools for indoor air quality in schools. The main goals of an HVAC system are to provide thermal comfort and contribute to the maintenance of acceptable indoor air quality (IAQ) through adequate ventilation and filtration. Systems for heating, ventilation, and air conditioning are included in the design tools for indoor air quality in schools. The main goals of an HVAC system are to provide thermal comfort and contribute to the maintenance of acceptable indoor air quality (IAQ) through adequate ventilation and filtration. Air Cool provides the Best HVAC service.