airflow

hello all .i need some advice about airflow my growroom is next to the chimley breast i was thinking of drilling 2 holes in it and installing 2 fans .i really like the idea ,but not sure of what height 2 have the extractor fan thou .any feed bk on this would be great ty all

intake fan should be low and exhaust should be at top,,oh good mornin and welcome

Keep on Growin

HoLE

so i gotta put it at top of the room its 2.4 metres by 3 metres by 4 metres . ty 4 advice hole
ill try it at thetop