The biggest difference between MacFarlane Energy and our competitors is the outstanding performance of our service department. It is easy to take heating and cooling technicians for granted, but there are differences from company to company that affect your bottom line. For example, new heating and cooling equipment must be installed with precision to deliver maximum comfort and perform at peak efficiency. In fact, the U.S. ENERGY STAR program reports that an imperfect installation can diminish equipment efficiency by 30 percent.