There can be both good and bad impacts on your furnace after getting duct sealing done. However, the effects are determined on a case by case basis. As a homeowner, you should be aware of the potential side effects that can come along with duct sealing.
Sealing the leaky parts of a duct system can increase the static pressure. You can think of static pressure like blood pressure. Too high of static pressure means your furnace and air conditioner fan must work overtime to push the air. Depending on the type of fan and how your ductwork is designed this increase in static pressure can result in less air flowing past your heat exchanger. When duct sealing takes place on poorly designed duct systems, the airflow can be impacted and, in many instances, decreased. This can cause problems as there is a minimum acceptable level that most HVAC systems require in order to efficiently operate. If these levels are below or above what’s expected, this can cause problems and potentially decrease the life of your heating and cooling system.