Since I am replacing my heating and cooling system, all the interior air handling units need to be replace, along with the exterior compressors. My current system is made up of 3 big old air handlers....
These units have heat exchangers in them fed by a boiler and outdoor air-conditioning units. The Boiler feeds 5 units all together, these three green ones in the basement and two newer units in the attic. The Boiler was built the year I was born and probably is only about 70% efficient if that.
The part my wife really likes is that all the outdoor compressor units go away. With that goes the related noise. These units are stacked in the back end of the house out of the way a bit from everything, but just below our bedroom window.
The green colored air handlers, boiler and out door compressor units are all being replace with the white unit shown in the picture (Note its size vs one of the old green colored air handlers).
The air handlers in the attic are modern variable speed units, so we are keeping them. They also use the new 410A refrigerant systems, so we can install what is called a split system. Essentially, the big white thing includes a compressor, ground loop water pump, and an air handler. With a spit system, it deletes the air handler - passing hot and cold refrigerant to the air handlers in the attic. We wanted to save space in the basement so we mounted them in a rack (I stole this idea from President Bush's ranch where he did the same thing for his Geothermal system).
