The unfortunate reality of leaking ducts is that they are often hard to detect due to their subtlety. Even small leaks can lead to significant losses in efficiency and, ultimately, cost you a lot of money. Regular duct cleaning can help you identify leaks quickly and take action. The best time to use a duct sealant is as soon as you (or your HVAC technician) spot a leak.
Duct leaks are one of the most overlooked aspects of an HVAC system, yet the average home wastes 20 to 30 percent of its airflow due to these leaks. The sealant is atomized and applied to the ducts at a speed that allows it to fill any gaps. A “spongy” sealant can cause thin areas to form where the bristles of the brush rush into the metal. If you're looking for ways to make your HVAC system more efficient, using a duct sealant is one of the best options.
It's important to understand how to use it properly in order to get the most out of it. New spray-applied sealant technology can eliminate the “bridge effect” of brushed sealants. In colder climates, it may be necessary to seal the ducts with a solvent-based sealant during winter. Sealant manufacturers often have premium sealants with a high polymer content (rubber for greater flexibility and glue for adhesion) and general purpose sealants.
When using a water-based sealant, it's important to know how long it takes for it to dry. Generally, it takes 24 hours for water-based sealants to dry completely. However, this time may vary depending on factors such as temperature and humidity. It's essential to wait until the sealant is completely dry before turning on your HVAC system.
Using a duct sealant is an effective way to increase your HVAC system's efficiency and save money in the long run. It's important to understand how to use it properly and how long it takes for it to dry in order to get the most out of it.