Originally Posted by

**peach49** Hi,

Im after a little assistance in re-arranging what i understand to be quite a basic equation used in ventilation engineering shown below:

Q = CdA √2ΔP/ρ

Im trying to re-arrange this equation in order to find the value of 'CdA'. I had presumed this to be simply 'CdA = Q / √2ΔP/ρ' - however my results dont seem to compare with those achieved in notes.

Can anyone re-arrange this equation to find 'CdA' and if possible please attempt to explain how this is done.

Many thanks in advance,

James