I am a first time home owner. I must say that I have no experience with duct cleaning or duct cleaners. I chose Europa because they were located down the street from me. They came in and did the job in the spring or summer of 06. The guys were nice enough, although they did install a wrong sized air filter. (too small) I really didn't notice any problems until the winter, when my 2nd floor tenants complained that no heat was coming from their ducts. I checked and confirmed this. I called Europa, got a machine and left a message with my concerns and contact info. After no return call, I called again and got a young lady. I explained my concerns and was told someone would call the next day. A couple of days later, I called again. I once again got the machine and left a message, again with my concerns and contact info. I never got a call back. Now certainly as a new owner I recognize that I'm as dumb as homemade shoes and don't know everything, but I think a short return call is not to much to ask. I would not use them again. very disappointed.