Aeroseal duct sealing · Calgary
Seal the leaks inside your ducts.
Aeroseal closes the gaps in your ductwork from the inside, without opening walls, and prints the leakage before and after. Start with an airflow calculation.
- 326 homes. 357 duct systems sealed with Aeroseal since 2020.
- Leakage measured before and after, on a printed certificate
- Leaks behind walls and ceilings sealed without cutting in
- Most homes done in a few hours
Call (587) 792-1456 or request service online any time
Assessment, no obligation The price you approve is the price you pay Calgary & surrounding areas
What a leaking duct actually is
Just like a leaking garden hose, leaking ductwork fails to deliver conditioned air to where it is meant to go. It escapes inside the walls and between the floor joists instead, and you pay to heat or cool it either way.
The metal joints in ductwork are not airtight. Unless they are sealed, air leaks out of them on the way from the furnace to the room it was headed for. In most older homes those joints were never sealed at all.
Every unsealed joint leaks, even where you cannot see it or feel a breeze against your hand. An infrared camera shows it plainly.
326 homes. 357 duct systems. Measured, not guessed.
22 measured systems: 83% less duct leakage, about 8.8 sq ft of holes sealed, roughly a 3-ft square. Results vary by home.
326 homes
Aeroseal duct sealing completed since 2020
357 duct systems
Sealed from the inside
27 communities
Across Calgary and southern Alberta
85 jobs in 2024
Our busiest Aeroseal year so far
Leakage figures come from the 22 measured systems with before-and-after Aeroseal reports on file. Results vary by home; your own before-and-after report shows yours.
Book an airflow calculation
We come out, measure what your ducts are losing, and tell you what sealing them would involve. There is no obligation to go ahead.
- A written price before any work begins
- A two-hour arrival window, confirmed before the visit
- An Alberta Indoor Comfort employee, not a subcontractor
Call (587) 792-1456 or request service online any time.
Signs your ducts are leaking
One room never keeps up
A room stays cold or hot no matter where you set the thermostat.
Dust comes back quickly
Dust returns soon after you clean.
Bills higher than expected
Utility bills are higher than you would expect for the house and the way you live in it.
Long run times
The furnace or air conditioner runs for long stretches without catching up.
None of these prove a duct leak on their own. The airflow measurement is what settles it, and that is what the assessment is for.
How the work is done
We measure first. Every supply and return vent is covered, and a computer-controlled blower pressurises the ducts and reads the leakage in cubic feet per minute. That reading is your starting point.
We inject the sealant. Aeroseal is fed into the pressurised ducts as a fine airborne mist, and the particles collect at the edges of every gap and joint until the openings close.
We measure again. The same test runs at the end, and the equipment prints a certificate with both readings. Most homes are done within a few hours, with the ducts back in use the same day.
What sealing the ducts changes
Air reaches the rooms it was meant to
Sealed ductwork delivers conditioned air to the grilles it was designed for, so a room that never kept up with the rest of the house gets a fair chance to.
Less dust drawn in from wall cavities
Air rushing past an open joint pulls in whatever is sitting in the wall cavity or joist space. With the joints closed, the air your filter cleaned is the air that arrives.
The equipment works less
Air that does not escape is air the furnace or air conditioner does not have to produce a second time. Less running time means less wear on the system.
You stop paying for air you never get
Heated and cooled air that escapes into a wall cavity was paid for and never used. Sealing the joints is how that stops.
The result is on paper
The certificate records the leakage before and after in cubic feet per minute, at a standard test pressure of 25 Pa. You can read what your own ducts did.
Nothing gets torn open
Because the sealing happens from inside the ducts, leaks behind walls and ceilings are reached without cutting into them.
What the Alberta Building Code says
Alberta Building Code 9-206 Division B, Sentence 9.32.3.11 states that all ductwork joints must be sealed with mastic, metal foil duct tape, or manufacturers’ specified sealants.
That took effect for new construction starting in 2006. Houses built before then are more likely to have ducts whose joints were never sealed in the first place.
Completion certificates from local jobs
Want to read or watch first?
Results differ from house to house, depending on how the ducts were built and what condition they are in. These cover the process in more detail.
Find out what your ducts are losing
An airflow calculation measures the leakage in your ducts and tells you what sealing them would involve. No obligation, and a written price before any work begins.