Steve,
I don't have a huge air conditioning uint as my house is small, but I change the filter on the air mover about every two weeks. Some times it is pretty dirty and others it isn't, but they are cheap. Where the heat pump unit sits out back, I have a big white tarp that used to be the cover for my car port that collapsed in the snow a few years ago. As the sun shines right on the unit from the minute it clears the mountains in the East until it goes behind them in the West, I was wetting it down and trying to figure a way to shade it some. I finally thought about that big tarp and got some tall fence posts that I could set in the ground back from it a ways and hung the tarp around them. I left plenty of room for the air flow and it seems to have helped quite a bit. I am thinking about trying to get some tubing that I can put over the top and spread the tarp across that and leave the sides open for about 3 feet up from the ground as that would stop all the sun from hitting it. Does this sound like a feasable plan to you?
Ron
