Chimney Balloon Large, Chimney Balloon offers the original and best inflatable fireplace flue blocker. Make your home more energy efficient The nifty device sits inside a chimney to stop warm air from escaping up a chimney and cold air from Explore chimney balloons designed to reduce draughts and heat loss. com. 67 Free international postage Chimney Balloons are the Best product available for blocking Chimneys when not in use. Simple to use, inflate to install then deflate to remove. Amazon. It will help stop debris, soot and bird mess. Block cold air, reduce energy costs, and eliminate odors effectively. The Chimney Balloon comes with a complimentary mouth inflation tube. This large Chimney Balloon is suitable for flues 12 – 14 inches deep and 25 – 38 inches wide. vqz, wpux1gst, gnul, 4kpu7, skp, tn2p, 0snmqi2, wzwr, in, d39,