Well we have been trying to figure out a way to beable to keep windows open when its hot out and rains and also to cut the sun for the hot summer days. We had alot of differant ideas on the drawing board but all in the end became to complicated or bulky or expensive. But then we had an epiphany and DH (sladue) and I found a great solution to our dilemma. Make an awning for the huge back window that our 96' SunValley has. If that can stay open when it rains and get shaded when its sunny it should make a HUGE difference in the temperture. Here's the breakdown: 10 elbows @ .25 4 "T's" @ .35 2 length's of pipe that I think dh said were $4 And the tarp we had which my mom sewed a channel for the pipe to set in. The bungee's were like $6. Total was around $15. No hardware to put on the pup just tension created from the bungees! Hope you all get the idea of how it works from the pics : ) Best part is it folds up super small and assembles easy.