Similar to the other posts, I also received a call offering free HVAC estimates. Coincidently, I have been looking for a new HVAC system (through what I thought were reputable companies) and am wondering if perhaps that's how my number was passed along to these people. I believe the caller identified himself as being from a company called "Clean Air".

Also got a call re free HVAC inspection and air ducks.  Did not sound at all professional.  I'd be very suspicious.

the call sounded very suspicious, asking for Mr......., and I told that person is not here now and just said: i will call another time. and hang up.didn't give any time to ask what was about, I tryed to call and nobody answers, and when answer they hang up inmediatly.   Sounds like a scam.

Called to sell a free inspection of HVAC and air ducts. Didn't sound very professional and there was a loud, annoying buzzing in the background. Or maybe that was the salesperson.

Also got calls from this number related to HVAC.  I'm pretty sure that the company that gave my number out to them is Cosmopolitan Mechanical Services.  After dealing with them I received a number of calls like this