Don't use this company, their equipment looks old and insufficient. You would think you could trust people to do their job when paying alot money for this procedure. Not so! So, they have this mobile brush snake machine which is about 20 feet long to clean each individual vent. Well, good thing I checked up on the guy. He had the main mechanical machine that powers the snake in the hallway at least 10 feet from the vent. Now take in fact that I have 8 foot ceilings, how much of the vent really got cleaned. Two feet at best. At that point I should have sent him packing, but made him redo the vent watched him on all the rest. Plus, I was finishing up a remodel, so half the the vent covers were already off but needed to be cleaned and reinstalled and he tried to get out of doing that. Big rip off. They don't deserve even one star.