How can dust aid in the maintenance of heat ducts?

Dust can serve as a valuable indicator of leaks in heat ducts. When there are leaks present in the duct system, air can escape or enter, moving dust along with it. If dust accumulates at certain points within or around the ducts, it often signifies that there are gaps or holes where air is flowing improperly. This accumulation can help technicians identify areas needing repair or maintenance, ensuring the ducts operate efficiently.

In contrast, while airflow improvement, insulation, and thermal conductivity are important factors related to duct efficiency, they do not have the same direct diagnostic value in terms of leak detection as the observation of dust patterns does. Thus, the presence of dust effectively highlights areas that require attention and maintenance within the ductwork.