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Movable Insulation
by William K Langdon
ISBN:402 pages 5.5x8.5 inches [size]
With easy construction plans for easy insulated curtains, a huge variety of panels that you can put inside your windows, outside, and fold up/down and much more. From an extraordinarily talented author, this 379 page book is an absolute must have for any homeowner that wants to stop heat loss now!