rickman wrote:
So what makes you think you need to replace a smoke detector every 5
years? I had units in my house that lasted over 20 years.

Likely a dusty environment.

On the other hand, I have not seen a CO2 detector for near the price of
a smoke detector. Are they really so inexpensive?

You mean CO detector.

My detector rolled over yesterday; full of dust and crap.

In Lowes I found battery powered, stand alone CO and smoke detectors
starting out at about $20, battery powered, stand alone combo CO/smoke
detectors starting at about $50.

High end, network enabled models for a bit more, hardwired dumb models
a bit less.


--
Jim Pennino