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Nighthawk KN-COSM-B Detector

Just wanted to vent a little bit.  Since we're selling our house in Maple Shade on April 30th, we have to have a "Certificate of Occupancy" issued to us by the township prior to settlement.  Part of this process involves someone coming out to inspect your fire extinguisher(s) and smoke/carbon monoxide detectors.  So I went to the house last weekend to make sure all of the batteries are new and that the detectors were all working properly.  Well, one of them was beeping every 30 seconds, even with brand new Energizer batteries! It's a KIDDE / NightHawk KN-COSM-B combination smoke and carbon monoxide detector (these ain't cheap either). 

After doing some research online, I've come to find out that these detectors "self expire" after 7 years, regardless of whether or not they are still actually functional.  So this one detector is basically trash even though it would probably work fine if not for this "feature."  We'll have to see what the inspector says when he comes out.  I'll just have to purchase new ones if needed, I guess.

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