Gross.

Window shopping may never result in any actual purchase - although it is also possible to window shop, see something you like, and buy it, in which case you did not waste your time (assuming that your purchase is well chosen, and not some junk that you don't really need).

You can, but it will only waste power trying to heat all the hot air that's coming in through the window.

i would think so.... because all that heat is just going to go out the window

if u have the heater on...then its cold outside probably..why would u open the window if the heater or the A/C are on?

sunroofs are good because you don't waste energy on heat you can let the sun in through the window on the top