When people think of air pollution they immediately think of outdoor air pollution.
Studies have revealed that the air inside our homes and offices may be considerably more polluted than the outside air.
Heating, ventilation, and air conditioning (HVAC) systems collect an astonishing array of contaminants that have the potential to affect your health. These include mold, fungi, bacteria, and very small particles of dust. Removing these contaminants from the HVAC system is an part of the overall process of improving your home's indoor air quality.
Hence the importance of furnace and duct cleaning.