Wow sounds like a really nice set up i never thought about using solar panels for heating sounds very convenient but in my case i don\'t think i can cement any walls were i will be building his enclosure i have two 10\' x 12\' aluminum sheds i was planning on converting into one big shed and building the enclosure inside i may have to relocate the enclosure in a few years so i don\'t think cement would work out for me =-? ...