ROCKVILLE, Md. — The Mechanical Service Contractors of America has announced four new “Star” contractors, bringing the total to 24 with the distinction.

The newest Star members are: Cal-Air Inc. in San Jose, Calif.; Coleman-Spohn Corp. in Cleveland; Commonwealth Air Conditioning and Heating Co. Inc. in Boston; and T.H. Eifert Inc. in Lansing, Mich.

According to MSCA, contractors designated as Stars employ certified technicians, maintain a superior safety record, offer outstanding customer service, and focus on continuing education and training for all employees.