[4RE KLR]

Yes, but remember that most a/c units need to breath from the top. The air comes in the side and circulates out the top. So be sure and leave adiquite space for the hot air to get out.

Shade is the best thing you can do for your units. That and keeping them clean. If you wash the condensor (the outside unit) and make sure it is clean and the air will circulate well you can go in the house a notice the difference the same day. Set a sprinkler on top of it. I know that sounds stupid but believe me it will make a difference. I am not telling you to spend 800.00 a month in water bills. Just keep it cool and clean as possible. What ever it takes.

Remember, most a/c units are designed to only cool down your home 20* below the outside temp. The newer ones will literally put a frost in the air but that is by design as well. If your unit is more than ten years old I recommend that you consider replaceing it. It will not be as efficient as it should be and it cannot perform the way the new ones do. I would wait and do it in the winter if you can because they have year end sales and winter sales just like everyone else does. You will be surprised at how much you can save by doing it in the winter.

I reccommend Trane 19i unitsthey replced the 1800 series about two years ago and they are wonderfull. They are @ 18 seer varible speed units, that are worth their weight in cold air.
The second units I would reccomd is American Standard. These are made in the same plant by the same people as the Trane units buit they are less expensive. You should look for variable speed unitsand anything above 16 SEER. (SEER= Seasonal Energy Effiency Rating)