Every time the blower fan comes on, a cloud of dirty particle-laden dust blows back into the indoor spaces of your home, completing the dusty cycle.
Some studies have found the air we’re breathing inside our homes and offices is far more contaminated than the air outdoors.
More and more evidence links childhood asthma with indoor air pollution.
However, that’s not the only problem.
The blanket of dirt also affects the operation of the furnace system.