Whether facing down the cold of winter or the extreme heat of summer, your furnace and/or air conditioning system needs to be performing in peak mode. The problem is that many homeowners are confused by this issue: should you repair or undergo a complete replacement. HVAC experts understand when a system is on its last legs. They know what to look for, how to assess the efficiency of a furnace or AC, and they can make recommendations that will benefit homeowners in the long run; that is if you are working with the right HVAC team!