The caller was calling from an Indian call center.  I could hear the boiler room noise in the background.  Caller was talking with a very heavy Indian accent  He said he was calling on behalf of Clear Air Solution(s).  I pressed him for more contact details, like the company's website.  He said the website was clearairsolutions.com.  I asked him for a contractor's licence number and he got stuck.  He was clearly reading from a script and he could not handle difficult questions.  He said a contractor would visit me and give me the necessary details.  I put the phone down on him when I did not get the contact details that I asked for.

I did a search on this website for Clear Air Solutions and there are several entries.

Please note, I got a call from another Indian telemarketer several minutes before this one, one of those Windows Tech Support calls, so they are all working together.