Ductless systems have been found to be more efficient than a conventional system.  However, removing an old conventional system and replacing it with ductless could prove to not be financially worth it.  Ductless systems can be ideal options for older houses without ductwork, for new additions, or for smaller rooms that can’t have ductwork, like sun rooms or retrofitting.

Ductless systems don’t work much differently than the conventional HVAC process except that the central access point is outdoors.  Ductless systems have a small unit in each room that needs heating and cooling mounted in a variety of ways: ceiling cassette, ceiling suspended, floor mount, wall mount or ceiling recessed (which looks like a conventional register).  Each of these have a refrigerant line that runs to the outside unit.

The outdoor unit contains:

  • Condensing coil
  • Variable speed compressor
  • Expansion valve
  • Fan

The indoor unit contains:

  • Evaporator
  • Quiet oscillating fan

The compressor is the heart of any air conditioning unit.  It is responsible for condensing low-pressure gas into high-pressure gas.  The condensing coil, with it’s lattice-like structure, converts the high-pressure gas into a high pressure liquid.  The fan then pulls that high-pressure liquid through the condensing coils and dissipates the heat build-up outdoors.

The refrigerant lines then pull this high-pressure liquid to the indoor unit which is distributed into the room that requires cooling by the quiet oscillating fan.  The indoor units also contain evaporators that can regulate the humidity of a room.  This can help reduce the need to use your unit.  Lower humidity can make the room feel cooler.

For an idea on how the setup would look, view the video below.  These explanations are not for the pros, it is just to help the average homeowner/tenant (or anyone shopping around for an HVAC system) to have a better understanding of what is going on behind the scenes.  Stay tuned for more explanations, get real-time updates by following us on Twitter and liking our page on Facebook.