Aside from the replacement of the unit itself, we will inspect other areas and determine if they also need to be replaces or supplied, including, evaporator coils, chimney liners, slabs, filters, driers, registers, drain pans, flue pipes, your thermostat, ductwork, and insulation, plus other features as they apply to your home and the type of system you are replacing. When we install a new unit as a replacement for an old one, the old system and all of its components will have to be removed before the new system is installed. If a system is being added for the first time to a home, we will have to examine the areas mentioned above and determine if those fixtures need to be installed also.