An HVAC contractor’s focus is often on sealing the duct system. But would you say sealing the building envelop is just as important? Why? 

The practice of capping the ends of duct started more than 15 years ago. Over the past several years, there has been a substantial increase in the requirements for covering the ends of duct after fabrication and during transportation, storage and installation.

When Air Management Industries was hired to seal ductwork on a government-owned building in downtown Los Angeles, officials knew standard brush-on sealant wasn’t going to cut it.

It’s an important action that is now required by many building and construction codes. That’s what officials with Carlisle HVAC Products are reminding contractors as the company promotes two products designed to boost energy efficiency and keep air conditioners working well.