Information required on regulations on Ventilation in windows/walls

Hi

For my newbuild, I am considering putting in window-only ventilation i.e. my standard concrete built house will not contain any wall vents.

Each of my windows will allow 4000p.a. (Pascale) of ventilation.

Could anyone direct me to a website where I can calculate the ventilation requirements in Pascale terms per room size e.g. for a bedroom 5mx5mx2.6m the P.A. should be 12000 p.a.

Thanks for your help. Pudzer

http://www.environ.ie/en/Publications/DevelopmentandHousing/BuildingStandards/FileDownLoad,1647,en.pdf

This is the relevant building regulation....

Habitable Rooms​

1.5​

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of the floor area of the room.

pascal is a unit of pressure, im not sure how this can translate to ventilation measurments.... but the window manufacturer must ensure it complies or you wont get it 'signed off'....