[bucknmusky]

Not to get too far off the original question, but it has been answered well here already but here is a sugestion for "windows"...hang a flat panel LCD monitor on the inside of your wall and a video camera on the outside, leaving the wall in between intact. Build some Faux windows on the outside. yes it sounds crazy but here, a very good well insulated window in 36"x48" can cost upwards of $500 to nearly $1000 and be a giant "thermal hole" with an R-value of about 4 vs your wall at R-20 to 30. The energy lost through the window panes and weatherseal etc. is roughly equivilent to the power required to run the monitor, and the monitor is only on when you want it, as opposed to 24 hours a day 365. Lifetime costs ~20 years you are far better off with the monitors and you can change the "view" to your liking