In many areas of the country, duct sealing and tightness testing is now mandated at local and state levels. This has brought about renewed interest in sealing existing duct systems among HVAC professionals as awareness increases.
While a properly sealed duct system can lead to improved IAQ, comfort, and possibly a reduced risk of carbon monoxide poisoning, is it possible that too much is being assumed for tight ducts to really be right ducts? Is there a possibility that duct sealing could negatively affect an HVAC system?