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And I meant to reply to you about the heating/cooling design. I think it is great! I don't think the distance between our locations makes it practical for me to attempt anything for you though. I recommend looking online at some DIY videos of window mounted solar ovens! The concept is very similar to what you are talking about and you might get some good ideas to improve on the design with.

Oh, I wasn't attempting to get someone to do it for me. I was hoping someone could make use of it, get the bugs worked out and put it out in a format anyone could use to make it for themselves. I am vision impaired and since my husband passed, I just cannot use power tools anymore. It is an idea needing someone to make it into a full plan.

Oh haha sorry for the misunderstanding! I got you now. It really is a brilliant idea! Let's see what I can do :)