We've had cooling (summer) and heating (winter) problems on some rooms in the house ever since we moved to a 13 year old house a year ago and wanted to fix it permanently. We've had like 5 different contractors tell us there was no problem with our vents and that our furnace/AC was ok but I refused to believe them.
I saw this product in one of the Home Shows in Toronto a year ago and did a thorough research on it. I had Victor, from this company come and using some sophisticated tools he found out within a few minutes what the problem was. There was 52% leakage from our vents so only 48% of the air blown from our furnace was reaching our rooms. He carefully explained the process and the cost too.
Long story short, he came with his team at a later scheduled date, blew in this product into our vents and managed to seal the holes in the ventilation/return system. We got a 99.4% efficiency after and the temperature of all our rooms (including the basement) are now almost the same.
My suggestion to you guys who have this issue to give Victor a call before you call any AC/Furnace contractor as replacing your unit(s) may not solve your problem at all.
Thank you, Victor and team!