grow tents and carbon monoxide?

[MrBungle]

could there have been a running vehicle or something like that running outside by your intake for an extended period of time?

 

[EastCoast710]

could there have been a running vehicle or something like that running outside by your intake for an extended period of time?

nah..

not even close lol..

 

[queequeg152]

did you ever determine if they were networked or stand alone?

if they are networked... just one bad alarm sets them all off.

what did your friends meter read btw?

 

[EastCoast710]

stand alone.