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• Vent pipe connections vibrating loose from clothes dryers, furnaces or water heaters. • Obstructions in or unconventional vent pipe designs which can amplify the above situations. 2. Extended operation of unvented fuel-burning devices (ranges, ovens, fireplaces). 3. Temperature inversions which can trap exhaust close to the ground. 4. A car idling in an open or closed attached garage or near a home. Page 9 HOW CAN I PROTECT MY FAMILY FROM CO POISONING? This alarm is an excellent means of prote