Homemade Cardboard Solar Window Heater Nov 5, 2012 14:56:26 GMT -5 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by PrisonerOfHope on Nov 5, 2012 14:56:26 GMT -5 Step-by-step instructions at link; cheap and effective! www.peterpop.com/solar-homemade.html