On Wednesday, May 22, 2013 11:32:22 PM UTC+1, Lawrence13 wrote:

No the chap made a mistake and really meant CO Carbon Monoxide of which there is a big campaign at the moment, however I'm intrigued where are these device usually fitted? I could imagine submarines or where people are in enclosed say subterranean conditions with no ventilation and a build up of Co2 but in ordinary offices and domestic settings?



So please tell me more and are such devices niche products .



Thanks

Maybe it was a typo...............

On Thursday, May 23, 2013 8:06:16 AM UTC+1, Dennis wrote:
On Wed, 22 May 2013 23:05:06 +0100, Neil wrote:





Concentrations above about 900 - 1000ppm will make it difficulty for

people to concentrate so generally we start to open dampers or speed

fans up at levels of 800ppm, depending on the building use.





It's interesting how often Lawrence, CO², and difficulty in thinking

and grasping the tenets of basic English,

appear in the same post