This is why I own a CO Monitor..

[rcontrera]

I never heard of the filter itself releasing stored CO. Very interesting, and scary that could happen with a one tank fill.

I'm with you, Don. I have been selling filters for a LONG time and this is the first time I have heard about storing CO. I know that many of the ones I provide have a chemical inside that changes deadly CO to relatively harmless CO2. I am not a chemist, but maybe we have something a little mixed up here? Maybe someone that IS a chemist can explain how/if that actually happens.

 

[SCUBA_Phil]

I'm with you, Don. I have been selling filters for a LONG time and this is the first time I have heard about storing CO. I know that many of the ones I provide have a chemical inside that changes deadly CO to relatively harmless CO2. I am not a chemist, but maybe we have something a little mixed up here? Maybe someone that IS a chemist can explain how/if that actually happens.

I was surprised too, so I contacted Nuvair (last year) and asked some questions and they confirmed what I observed. It is a small amount of contaminated gas, but is contaminated. Ray, you have access to many systems, next time you find one that has been shut down for ~2 weeks, sample the gas just after the filter before you start the system back up. Let us know what you find.