They just went off and it's good to know they work. With the warm weather that has come in I choked the stove and let the fire die this morning. FF to this afternoon and I go down to see that the fire is out and open the door, I assume that is when I let out all the CO-2 gasses out. I have four co-2 alarms, two hard wired one up and one downstairs by the stove and one each of the digital plug in's in the bedrooms. The hardwired alarms went off, presumably the one by the stove activated the alarm, and the digital ones in the bedrooms did not alarm but did show a reading off 37 PPM. I didn't read what the threshold for their alarms are, threw them out with the directions
. I think I want to get the digital type hardwired into the existing system, I don't like how the plug in's dangle out of the plug, there should be a screw that goes through the body and into the center screw of the outlet to hold in place securely.
Anyway make sure you have a good C0-2 alarm system in place BEFORE you fire up this year, mine works
edit to add; of course I cleared out the house before sitting down to type this.