"Ted Jackson" wrote in message
...
I live in an area where it gets really hot on some days. Some people place
black film on their windows to keep out the sun. There is a local company
that is selling totally black window screens that cover the entire window.
Those screens look great but I have a question:

Are such screens a great idea for keeping out the heat or is it just a
scam to make lots of money replacing regular screens with new screens that
cover the entire window?? On some types of windows, it means the new
screens would be twice as large as the older screens now on the windows.

If you're talking about the screens that look like bug mesh but
block 90% of the light, then they work very well at reducing heat.
For serious sun and heat conditions they're not enough by themselves
and you might also want to add some closed-cell shades as well
for when the windows are getting direct sun.

--Neil