Which means you will probably need to turn on the heating unit in your house soon.
Which means you will probably need to get your heating unit cleaned.
So by now, you probably have already had the aroma of burnt dust emanate throughout your house or business. This is because the dust that you smell burning up has been building up inside your air ducts throughout the spring, summer, and autumn months, and is just now leaving your air ducts the hard way. Now, if all that dust has been accumulating in your air ducts, think of what else could be lurking in there. Spider webs, mold, dead insects, and all other sorts of unsavory things could be in your air ducts as we speak.
Well, the one thing you have to take into consideration is that air ducts, depending on the volume of people and animals occupying the building, should be cleaned anytime from every one to every five years. Vacuuming around the edges and just inside the vents will not get it done, either; a thorough and deep cleaning of all ducts and vents must be done to get the full effect. Not only will cleaning your air ducts cut back on the health hazards lurking in your air ducts, but it also reduces the risk of a fire due to the burning dust, and it also helps make your heating unit more efficient, saving you money on energy and natural gas costs.