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Bio: Mark D. Tyrol is a Professional Engineer specializing in cause and origin of construction defects. He developed several residential energy conservation products including an attic stair cover and an attic access door. Battic Door is the US distributor of the fireplace plug. To learn more visit www.batticdoor.com

batticdoor's Website: www.batticdoor.com

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1. How To Stop Drafts and Save On Energy Bills (267 views)