Hi David - the short answer is yes, the building reg specs identify the required air exchange rate - you can use this to do the calls if you want more of an insight. Be aware that confined spaces such as service inlet cupboards and lift shafts will still need to be addressed separately
Regards, Sarah
> On 1 Jun 2017, at 09:56, David E Jackson <[log in to unmask]> wrote:
>
> Dear List,
> Q. Can an active vehicle exhaust venting system provide adequate ground-gas protection (CS2) for an under-croft car park? BS8485 allows '4 points' for such a system (Building Regs 2000 compliant), but does not provide and design specs!
>
> Does it matter what sensors are used? (particulates or CH4/CO2) or where they are placed? (in rafters or on floor) I assume particulate/heat sensors have different trigger conditions from those used to monitor ground-gases?
>
> Cheers David E Jackson.
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