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  • DavidH222 commented on cheft's instructable Greenhouse From Old Windows6 months ago
    Greenhouse From Old Windows

    some treated wood is carcinogenic

    in cold areas, heat in the colder seasons would be very expensive. so an insulated unit would be needed if you start bedding plants in febuary. I saw clear bubble wrap at lowes that was two feet wide, which might make a cheap insulating material. also if you can put the unit three feet in the ground and then concentrate on a slanted roof like older heat boxes that people used. any type of heavy plastc with a small fan blowing air could insulate if it was sealed right.

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