Many people seem to overlook the fact that the “V” in “HVAC” stands for ventilation. Lack of maintenance and the incorrect usage of your HVAC system will result in poor indoor air quality, which can lead to problems such as inadequate humidity and the spread of allergens and bacteria. In this blog, your local HVAC contractor Amber Air Conditioning Inc. shares the signs that your building’s HVAC system as affecting indoor air quality.