8 Jan 2010
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United Kingdom

We recently taken over a commercial building that has a 180kw gas boiler located in the basement. We had a thermostat replaced and the engineer noted that we have insufficient ventilation.

He has provided me with the required amounts (654/1308cm2) but I was wondering whether these amounts are for direct ventilation to the outside? Currently, the boiler room is ventilated into the basement corridor (through a pair of high and low level intumescent vents) which has an ajoining external door with louvred high and low level vents in it.

If both doors had the required 654/1308 would that be sufficient or do I need more to take into account the indirect nature of the ventilation?

Any advice much appreciated!

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Thanks for the reply.

Double the ventilation would basically mean the entire door being a vent - I'm guessing that would mean a steel louvred door?

Do we need intumescent vents in the boiler room or is that just an additional safety feature?



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