Group aims to help members increase productivity and keep customers.

Innovative Service Solutions, R&S Mechanical and Straus Systems are the newest members of the Unified Group, an alliance of HVAC independent contractors.

Innovative Services Solutions in Orlando, Fla., specializes in HVAC service and installation, refrigeration and ice machine service. Cayce, S.C.-based R&S Mechanical specializes in commercial HVAC, electrical service and controls, and covers all of South Carolina.

Straus Systems of Stafford, Texas, specializes in HVAC service and controls, sheet metal installation and fabrication, piping and engineering. Straus operates primarily in Houston and its surrounding areas.

Formed in 1998, the Unified Group is an association of 45 HVAC commercial contractors. The group works to help its members increase productivity, profitability and customer retention through training and information.