unused chimney ventilation

5 Mar 2008
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United Kingdom

I have an unused chimney stack in my houes. It goes from my living room and up through bedroom.

The fireplace has been plasterboarded closed. Now I know that unused chimney stack should be ventilated but was wandering wha the best way to go about this is.

Should I just cut away some of the plasterboard away on the top of the boarded in fireplace and cover with a grill vent or should i actully drill into the chimney stack and vent in the living room and then also in the bedroom.

I will be renting a core drill in a few weeks to vent my kitchen extractor so it should be to hard to drill some more holes in the chinmey stack at various levels in the house.

If I kep it simple and just vent the fireplace I assume this will work as passive stack ventilation, which is a good thing..right?? If I vent the actual stack at various levels will i loose this passive stack effect and are there any benefits to venting at various levels.

Thanks for any advice

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definatly go for the board but at the bottom to reduce the amount off stagnent air

you also need to check for ventilation above the roof level to allow through ventilation
Thanks, by above roof level do you mean the chimney pots? They aren't blocked up, so that should be enough.

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