MaxSeal LLC

Dedicated staff and crew! My home had over 45% of duct leakage and the team has managed to reduce the leakage by 82%! They even discovered a duct that wasn’t terminated correctly in my crawlspace. I was basically heating up my crawlspace. Its truly amazing to find a business that go above and beyond to fix an issue! Attached before & after pictures Thanks Alex & crew!

I am very happy opting for Maxseal for the internal duct leakage test. Alex is an amazing person, who had a great strategy in place to test right from the get go and he was incredibly transparent throughout the entire process. Even though the test confirmed there were no leaks, I loved that every step was well-explained and quantified with clear data. It’s rare to find that level of professionalism and technical detail, giving me total peace of mind. I highly recommend his service to everyone.

It was a wonderful experience working with Alex and his teammates, Daniel and Marco. Alex was honest and upfront about expectations, clearly explaining which improvements were essential versus simply nice to have. The team was professional, finished on time, and left the site clean and tidy. They were knowledgeable and patient, and they addressed all of my questions thoroughly. The work feels like great value for money, especially since I’ve seen a noticeable improvement in my HVAC runtime. I also have a guest room that used to feel a bit colder in winter and hotter in summer, and after the MaxSeal team’s work, I could quickly tell it no longer feels colder this winter. Great work, guys!

If you live in San Jose and are looking to improve the airflow and air quality from your HVAC system, MaxSeal is absolutely the company to call. Alex and his crew were fantastic from start to finish—excellent communication, always on time, spotless work areas, and an impressive level of thoroughness throughout the whole process. Alex originally promised a certain level of improvement, and while the first visit got me most of the way there, it wasn’t quite what he had aimed for. He promptly scheduled a follow-up visit and came back out at no additional cost to make sure everything was dialed in perfectly. That kind of integrity and commitment to results is rare these days, and it’s exactly why I’m recommending MaxSeal. Before MaxSeal, I had to sleep in a parka just to stay warm. Now I sleep

Alex and his crew did a wonderful job of explaining why my system was so leaky and how MaxSeal works. They completed the project in a timely manner and we're friendly and helpful during the whole process. And it does work! After treatment, including duct cleaning, much of the sneezing/coughing has been eliminated and we have a much more evenly heated environment. I highly recommend Alex and MaxSeal!