Tommy Löfvenius Vvs AB should install a ventilationsystem in a house. Therefor he need to do some calculations.
To do this he use a special formula:
Roomvolume · 0,5 · ∆T · 0,31 · 1,163 = WRoomvolume = m3
Put the values you got in roomvolumescalculations in the formula and calculate how much W you need to change air in these rooms. Answer in integer.