AEROSEAL DUCT SEALING • TORONTO & THE GTA
How the Aeroseal duct sealing process works.
Aeroseal is a measured duct-leakage sealing process. DAVESDUCTS first tests and inspects the duct system, manually repairs accessible major deficiencies, isolates connected HVAC equipment, then uses Aeroseal technology to seal qualifying leakage from inside the ductwork before performing a final leakage test and providing the results.
Professional duct-leakage testing and sealing.
Pre-seal and post-seal leakage results.
Accessible major deficiencies addressed before sealing.
Applicable Aeroseal sealing workmanship coverage.
THE PROCESS
Aeroseal starts with testing — not with sealant.
The goal is to understand the condition of the duct system, address defects Aeroseal cannot fix, and then measure how much qualifying leakage can be reduced.
INSPECT
Evaluate the duct system.
DAVESDUCTS reviews the accessible supply and return ductwork, including applicable attic or crawlspace areas, and looks for obvious disconnections, blockages, damaged sections and major leakage points that should be corrected before Aeroseal is used.
TEST
Measure the starting duct leakage.
The duct system is pressure-tested to establish a pre-seal leakage baseline. This gives us a measurable starting point rather than relying only on visual inspection.
REPAIR
Manually seal accessible major leaks.
Accessible duct joints, connections, registers and larger leakage points are manually sealed with appropriate materials such as mastic and metal tape where required. Disconnected or physically damaged ductwork must be repaired before the Aeroseal process can address the remaining qualifying leakage.
ISOLATE
Protect equipment and occupied spaces.
Connected HVAC equipment and components that should not be exposed to the sealing process are isolated. Registers and grilles are sealed so the duct system can be pressurized and the sealing material remains within the intended ductwork.
PRESSURIZE
Place the duct system under controlled pressure.
The Aeroseal equipment is connected to the duct system and the ducts are placed under controlled pressure so escaping air can carry the sealing particles toward leakage points.
SEAL
Seal qualifying leakage from inside the ductwork.
A fine Aeroseal sealing material is introduced into the pressurized duct system. As air escapes through small leaks, the particles accumulate at the edges of those openings and seal qualifying leakage from the inside.
MONITOR
Track leakage reduction during the seal.
The Aeroseal system monitors leakage during the process so the technician can see the duct system tightening in real time and determine when the sealing cycle is complete.
VERIFY
Perform the final leakage test.
Once the sealing process is complete, the duct system is tested again so the post-seal leakage can be compared directly with the original baseline.
DOCUMENT
Provide the leakage report and certificate.
DAVESDUCTS provides the applicable pre-seal and post-seal results so you can see the measured change in duct leakage instead of relying on a subjective claim that the ducts are “sealed.”
RESTORE
Return the HVAC system to service.
Temporary seals and protective measures are removed, isolated equipment is reconnected as applicable, and the system is returned to its normal operating configuration.
WHAT AEROSEAL CAN — AND CANNOT — DO
Aeroseal seals leakage. It does not rebuild defective ductwork.
Aeroseal is most effective when the duct system is physically intact but has distributed leakage at seams, joints and small gaps.
AEROSEAL CAN HELP WITH
Qualifying duct leakage.
- Small leaks at duct seams and joints
- Distributed leakage hidden behind finished surfaces
- Air loss from otherwise intact duct systems
- Leakage that is difficult to reach manually
AEROSEAL DOES NOT FIX
Physical duct defects.
- Disconnected duct sections
- Blocked or crushed ducts
- Major physical damage
- Large openings beyond Aeroseal’s sealing capability
- Equipment problems
- Improper duct sizing or system design
IMPORTANT LIMITATION
Gaps larger than approximately 5/8 inch require manual repair.
DAVESDUCTS inspects for major deficiencies before the sealing process because Aeroseal is not intended to bridge large openings, reconnect separated ductwork or correct blockages. Those conditions must be repaired physically.
WHY MANUAL REPAIRS COME FIRST
The best result is often a combination of physical repairs and Aeroseal.
Aeroseal should not be used as a substitute for repairing accessible duct defects. DAVESDUCTS addresses reachable deficiencies first, then uses Aeroseal for the leakage that remains within the intact duct system.
01
Accessible connections.
Registers, grilles, plenums and reachable duct joints can often be sealed directly with mastic, metal tape or appropriate repair methods.
02
Major deficiencies.
Disconnected, damaged or poorly supported ductwork should be physically repaired before the pressurized sealing process.
03
Hidden distributed leakage.
Aeroseal then addresses qualifying leakage that remains inside walls, ceilings and other areas that may be impractical to access manually.
MEASURED RESULTS
Before-and-after leakage testing is the proof.
Aeroseal is different from a visual-only duct sealing service because the system is pressure-tested before and after sealing.
PRE-SEAL TEST
Establish the baseline.
The initial pressure test measures how much leakage exists before repairs and Aeroseal sealing are completed.
POST-SEAL TEST
Measure the improvement.
The final pressure test measures the remaining leakage so the reduction can be documented and compared with the starting condition.
DOCUMENTATION
You receive measurable results — not just a claim.
The applicable Aeroseal documentation includes the pre-seal leakage result, post-seal leakage result and sealing certificate for the completed project.
WHAT HAPPENS TO THE HVAC EQUIPMENT?
The equipment is isolated from the Aeroseal process.
Aeroseal is a duct-sealing procedure. It is not intended to treat furnaces, air conditioners, heat pumps, coils, filters or other connected HVAC equipment.
Equipment Isolation
Applicable connected equipment is isolated so the sealing material is directed into the duct system rather than through mechanical components.
Register Sealing
Registers and grilles are temporarily sealed so the duct system can maintain the pressure needed for the process.
Protective Measures
Protective measures are used to keep the process controlled and to prevent unnecessary exposure outside the intended duct system.
AEROSEAL PRICING
Current residential Aeroseal package.
DAVESDUCTS currently publishes a residential Aeroseal package that includes testing, inspection, accessible manual repairs, Aeroseal sealing and post-seal documentation.
RESIDENTIAL PACKAGE
Includes up to 16 supply vents
Additional supply vents are currently $49 each. Larger homes, multiple-furnace systems, condos, no-driveway townhomes and commercial projects require custom pricing.
+ HST
10-YEAR LIMITED WARRANTY
DAVESDUCTS stands behind the Aeroseal sealing work.
The current residential Aeroseal package includes a 10-year limited warranty covering qualifying leakage resulting from ordinary use, ordinary wear and sealing-process workmanship, subject to the applicable warranty terms.
Ordinary Wear
Applicable sealing work is covered against leakage caused by ordinary wear and tear under the warranty terms.
Normal HVAC Use
Coverage applies to qualifying Aeroseal sealing under ordinary operation of the heating and cooling system.
Sealing Workmanship
The warranty addresses qualifying leakage caused by improper workmanship during the Aeroseal sealing process.
AEROSEAL PROCESS FAQ
Common questions about how Aeroseal works.
Does DAVESDUCTS test the duct system before Aeroseal?
Yes. The duct system is pressure-tested before sealing to establish a measurable leakage baseline.
Do you repair large leaks before Aeroseal?
Yes. Accessible major leaks, disconnected ducts and physical deficiencies should be manually repaired before the Aeroseal process. Aeroseal is intended for qualifying leakage in otherwise intact ductwork.
How does Aeroseal seal ducts from the inside?
The duct system is pressurized and a fine sealing material is introduced into the airflow. As air escapes through qualifying leaks, the particles accumulate at the edges of those openings and seal them.
Can Aeroseal fix disconnected ductwork?
No. Disconnected ductwork, blockages, crushed sections and major physical defects require manual repair.
Can Aeroseal seal large holes?
No. DAVESDUCTS currently identifies gaps larger than approximately 5/8 inch as requiring manual repair rather than Aeroseal sealing.
Does the Aeroseal material go through the furnace or air conditioner?
No. Applicable HVAC equipment is isolated from the process so the sealing material is directed into the duct system.
How do I know whether the sealing worked?
The duct system is tested again after sealing. The post-seal leakage result can then be compared with the pre-seal baseline and documented in the final report.
How much does residential Aeroseal cost?
The current DAVESDUCTS residential Aeroseal package is $2,399 + HST and includes up to 16 supply vents. Additional supply vents are currently $49 each. Custom pricing applies to larger or more complex systems.
AUTHORIZED AEROSEAL DEALER • TORONTO & THE GTA
Want to know how much your duct system is leaking?
DAVESDUCTS can inspect, test, manually repair and Aeroseal qualifying duct leakage — then provide measured before-and-after results.
