In a ~25sq.m. ventilation room there are 5 separate vertical penetrations not enclosed by walls. Only steel rectangular ducts (1x1m) go through them and there are enough space for walking in this room for maintenance, etc.
Q: How shall I measure these vertical penetrations? To the surface of metall ducts and deduct them as MVPs? The floor area of the ventilation room will be rentable in this case.
Otherwise it looks reduculous to consider the whole room enclosed by brick walls a big MVP only because of these shafts. Please, advise.