The short answer to this is, “yes.” Yes, you can add an air conditioner to a forced-air heating system. It is, however, a complex process and we never recommend it be attempted by a homeowner. Of course, we’ll say this about any air conditioning or heating installation. There are many factors that go into matching the right system to the right home—take sizing for instance.
Many homeowners believe “the bigger the better” when it comes to their HVAC installation. But actually, just as too small of a system won’t be powerful enough for your home, too large of a system will be too powerful and will go through a process called “short-cycling,” which is damaging to the system. But we digress.