MSCA honors members earning the MSCA Start Certification.

ROCKVILLE, Md. - The Mechanical Service Contractors of America has awarded its "Star" status to Adrian Mechanical Services Co. in Adrian, Mich.; Air-Ex Air Conditioning Inc. in Pomona, Calif.; Cal-Air Inc. in Whittier, Calif.; Cal-Air Inc. in Sacramento, Calif.; Commercial Refrigeration Service Corp./Commercial Mechanical Services in Rockford, Ill.; D.P. Wolff Inc. in Hawthorne, N.Y.; Entec Services Inc. in Peoria, Ill.; John E. Green Co. Inc. in Lansing, Mich.; Mechanical Inc. in Freeport, Ill.; Thermalair Inc. in Anaheim, Calif.; Thermodyne Mechanical Services in Northbrook, Ill.; and W.E. Bowers & Associates Inc. in Beltsville, Md.

Contractors that earn the MSCA Star certification uphold a code of business ethics and employ trained and qualified workers, according to association officials.