Clean Air Services

TELEPHONE CALL [why isn't that one of your choices for means of contact?] 9-22-15 from 240-573-7981 in Upper Marlboro, MD. Caller identified company as Clean Air Services and says they have a report that my ac/heating system is due for an annual inspection. Told the caller this is a scam and I would report it. Have never had any prior contact with such a company, but have received 3 calls recently. I am reporting to Fairfax County Consumer office and to Maryland consumer department.