Duct sealing is a process used to seal leaks and gaps in the ductwork of your HVAC system. It is an important aspect of HVAC maintenance and energy efficiency. Here’s an overview:
Importance of Duct Sealing:
Energy Efficiency: Leaky ducts can result in significant energy loss as conditioned or heated
air escapes before reaching its intended destination. Sealing ducts can help to ensure that
heated or cooled air remains within the duct system, reducing energy waste.
Improved Comfort: Properly sealed ducts ensure that rooms receive the full benefit of
conditioned air, leading to more consistent temperatures and more comfort throughout your
home or office space.
Indoor Air Quality: Leaky ducts can draw in dust, dirt, and other contaminants and allergens
from attics, crawl spaces, or basements, impacting your indoor air quality. Sealing ducts can
help to prevent these pollutants from entering your home or office.
Moisture Control: Sealing ducts can help prevent moisture from entering your ductwork, which
can lead to mold growth and structural damage. During the summer months, your attic air
temperature can reach up near 130 degrees. The hot air enters your duct work through leaks
that have not been sealed. The primary job of an AC evaporator coil is to pull this heat out of the
air; however, your AC evaporator coil is unable to remove that much heat out of the air. This will
result in humidity and moisture downstream creating an environment for moisture.
Methods of Duct Sealing:
Mastic Sealant: Mastic is a thick adhesive substance that is brushed onto duct joints and
seams to create an airtight seal. It is durable and effective for sealing small to moderate leaks.
Metal Tape (Foil Tape): Aluminum foil tape is another commonly used material for sealing
ducts. It is applied over joints and seams to provide a tight seal. However, it may not be as
durable as mastic and may degrade over time.
Aerosol Sealant: Aerosol sealants are liquid sealants that are sprayed into the ductwork. They
are typically used for sealing inaccessible or hard-to-reach areas. The sealant expands and
dries to create an airtight seal.
Duct Insulation: In addition to sealing leaks, insulating ducts can also improve energy
efficiency by reducing heat loss or gain through the duct walls. Insulation materials such as
fiberglass or foam board can be wrapped around the ducts to provide thermal insulation.
Duct Sealing Process:
Assessment: A thorough inspection of the ductwork is conducted to identify leaks, gaps, and
other areas needing attention.
Preparation: Before sealing, the duct surfaces should be cleaned and free of debris to ensure
proper adhesion of the sealant.
Sealing: Depending on the method chosen, sealant is applied to joints, seams, and other leak-
prone areas using appropriate techniques and materials.
Testing: After sealing, the ductwork will be pressurized and tested to ensure that leaks have
been effectively sealed.
Professional vs. DIY
While some duct sealing tasks can be performed by homeowners or maintenance staff as a do-it-yourself project, there is no way to reach on top of ducts, up walls, in sheet rock areas etc.
That is why it is recommended to hire a professional for more comprehensive sealing jobs. Here at Advanced Air Duct Cleaning, we have the expertise, tools, and equipment necessary to properly assess and seal ductwork, ensuring optimal performance and energy savings.
In conclusion, Aeroseal duct sealing is an essential maintenance task that can improve energy efficiency, indoor air quality, and comfort in residential and commercial buildings. By sealing leaks and gaps in the ductwork, property owners can enjoy lower energy bills, better comfort, and a healthier indoor environment. Reach out today to get started with a free quote.