HVAC system surfaces have always been point surfaces for microbial contamination that may degrade the indoor environment's IAQ and the interiors of these systems provide an especially favorable environment where microbial growth can expand uncontrollably into colony form units. Cooling coils, drain pans and the fan housing assembly are the most contaminant-prone components of an air-handling unit. When mold colonies grow, they produce a sticky substance called enzyme mycelium, which traps dust particles from the air and breaks down the trapped particles into food. By preventing the growth and establishment of colonies, you can effectively eliminate the various health effects caused by biological contamination in the air-handler. Controlling this contamination is essential to maintaining the quality of air inside your building. BBJ MicroBiocide™ is the answer.