I installed one in the shop I worked in when we installed an unvented LP
radiant heater. The level would stay at zero even with the diesel powered
torpedo heater going. BUT start a push mower for 2 minutes and that would
drive that thing wild! If you want to test one, just take it to the garage
and start a small engine.

--
Steve Barker

wrote in message
oups.com...
I had a old computer power supply overheat, and set off the CO
detector not long ago. At least that APPEARED to cause the alarm....

Any burning action can cause elevated levels