I would also consider the SEER (efficiency rating). There are three technologies used. Single stage. Most TV homes have these, they are on or off. They are inexpensive.
It usually gets your home cold so quickly that it doesn't get the air very dry.
Which leads us to the higher SEER units.
The first is a two stage it is off, low or high. It might run on low longer but lower your humidity so much that you are comfortable at a higher temp with drier air.
The third model is high tech variable speed but so high tech they are prone to breakdowns.
The SEER ratings are along the lines of 14, 17, or 20 respectfully. I would get a two stage unit.
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