I bought the 12,000 btu unit last year when my central HVAC went out. Looking forward to another sweltering summer in South Carolina, I purchased the 14,000 but unit this year. I've tested it to make sure it's in working order, which it is. The one remarkable difference between this and the 12,000 btu is the size. The 14,000 unit is huge. Ironically, it is quieter tha the 12,000 btu unit. My only complaint is that the window panel was way too wide for the window. I swapped it with the window panel for the 12,000 btu unit, and the panel for the larger unit fit that window fine. However, the even smaller window panel for the 12,000 btu is still too small for the window for the other unit. There will be some 'surgery' going on. A lot of people complain about the hose assembly on these units. This is how I beat it: I connected the hose to the unit and held it while i pushed it up against the wall; I put the window panel with the hose attachment in place, then pushed the hose into place. I then pushed the window down and the hose hasn't budged in a year. I only wish Keystone made higher btu units because my living room/dining area are one huge space. However, the two bedrooms in use will be icy, and that's what I need the most.
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