Put your camera down the duct and take a picture. Look at some of the registers or grills around your home or work area. Check for particles of black dirt or dust on them especially on the return air grills. Check for dust and dirt around your home/work area and on top of tables, cabinets and desks. If you notice more than trace amounts, your ventilation system is passing bad air and probably needs a thorough cleaning to provide healthy air. The indoor air quality of a home or business may be so poor that health problems such as allergies, asthma and other breathing disorders can be magnified. Not only can this be a health concern, but it also leads to lost time and productivity in the work place. Many people have allergic reactions to pollen, bacteria, dust mites and mold. These particles, along with other invisible pollutants, settle in the air ducts and are re-circulated every time the furnace blower is operating. A clean HVAC system not only eliminates most contaminants but also can improve the efficiency of your air conditioner and furnace by improving air flow.
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