I just ate it for $7,200.00 for an entire new system last month. What a difference! My old system was 13 years old and was never quite large enough. Plus it was a cheap builder grade system that was poorly designed. The plenum created a dead spot, and air just never seemed to move in enough volume. The air coming out of the vents was cold, but there just never seemed to be enough of it.
Now it blows like hell, and the cooling effect is much more profound and evenly distributed. The system is larger and much more energy efficient. They also installed a complete new gas fired furnace. I can't complain about the install. Everything went into the attic. At first they told me they would have to cut open the attic access opening. Something I was not looking forward to fixing. They then told me they could disassemble the unit, then reassemble it in the attic. They worked 12 hours start to finish and they didn't have to cut into anything. They even came back the next day to re engineer my cold air return because he didn't like the way it was done. The new unit is also all but silent compared to the old one that roared. The heating system is also much more even in the way it spreads the warm air. I went from a SEER 10 to a SEER 16, so I should see some savings this Summer. Bill T.