Some of these molds or fungus are also found in many common medicines and foods. Some molds produce toxins to protect their environment. The toxins or fungus, when inhaled are a significant cause of common allergic reactions, altered immune function, asthmatic reactions, chronic sinusitis, depression, diarrhea, fatigue, headaches, irritability, liver damage, nose bleeds, respiratory dysfunction, or sore throat. One of the worst molds is called Stachybotrys chartarum, which causes cold or flu-like symptoms. One family suffering because of it tried selling their home resorted to burning it down instead.
Schools spend thousands replacing walls and ceilings because of molds.
A simple ozone generator would have been a lot less expensive. Source control, ventilation improvements and air cleaners are effective ways of improving indoor air quality. Air cleaners with carbon filters are a breeding ground for microorganisms. If these types are not changed or cleaned periodically, the situation will worsen. Ventilation improvements can get very involved and more costly than most alternatives.