On 11/30/2020 8:36 AM, trader_4 wrote:

I don't understand the scoring. The combo ones are all way higher than the smoke only.
Does that mean that the scores for the dual units were a number for smoke plus a number
for CO so those numbers don't directly compare? Did they have some explanation or
reasoning as to why the dual units were not as good?


The dual sensor units are Ionization & Photoelectric in one. No CO sensor.
I always kept a CO detector separate from Smoke detectors.
I have a First Alert CO detector w/digital readout that plugs into the
wall and has a battery backup.