We have been working with Preferred Mechanical Services for over 25 years. Preferred has been our exclusive contractor for both maintenance of our existing HVAC systems and installation of new replacement systems. Recent installs include new cooling tower, new heating system, and many new heat pumps. We have remained a Preferred customer because they do quality work, provide immediate service, and help us plan for the future with a structured maintenance program allowing us to budget for new equipment well in advance for when it will be ultimately required. Preferred is wonderful to work with, and saved us many times from heating and cooling emergencies. With 75 offices in one building alone, we need  Preferred to keep us running smoothly.