Reply #16: I don't think it made much difference, unfortunately.

[Lisa0825]

My AC still couldn't keep up with the heat during July and August, and my bills stayed about the same. I was also trying putting up a sun shade (like a picnic tent) over the outdoor unit since it gets direct afternoon sun, but neither idea seemed to make a difference. Plus, even with the filter that comes with it, I started noticing white buildup on the exterior of the unit, and was afraid that would cause problems, so I took it off.

Wish I had better news!