OK, we all know to change batteries on smoke detectors but they do have an effective life span of 10 years. Even though they may test ok, they still may not be effective for particle detection. We just had interior and exterior painted and as painter was up on ladder in vaulted ceiling, I asked him to toss down the detector to change backup battery. Flipped it over and OOPS! It was expired! They do have a life span that is based upon ionization particle capability so over time that degrades. I went to Lowes and replaced everyone of them in house. Luckily they are same ones so easy just plug and go. Just a share since it is so easy to overlook replacing them even though they are not chirping.
Attached is a safety sheet for them from NFPA that reminds you to change them out every 10 years.
Attached is a safety sheet for them from NFPA that reminds you to change them out every 10 years.
