9. Carbon Monoxide Alarms
Ends in: 5 to 7 years
Cost on average: $10–$600*
You must have carbon monoxide detectors in your house. In the event that the air quality in your home rises too high, they notify you. Untreated elevated CO levels have the potential to be fatal, and every year, there are a few horrifying news reports about people who died or had severe injuries as a result of exposure to too much CO.
Carbon Monoxide Alarms ©Shutterstock/Alexander Raths
Even if you routinely replace the batteries in your carbon monoxide alarm (which you should), the alarm will not last forever. The lifespan of the alarms is five to seven years, but you should confirm with your user manual. Replace the complete alarm after five to seven years, or as the instruction specifies.
zi ang