I built this last week when a friend gave me a window,I just had to put it to use.I will start tomatos and peppers in it,hopefully it will work..I ran a set of xmas lites in it for nite time temps and put a cpl two litres half full of water to heat up during the daytime and release heat at nite...I will take temp readings this week during nite and day and see what else I may have to do..the reading today was outside temp 38 inside 102 degrees..it heats up quickly..

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