Every single storey should be ventilated by lasting openings at Every single car parking amount. The openings is usually at ceiling amount. The aggregate cost-free vent region must be no less than 1/40 of that stage's ground region, not less than half of which must be delivered equally by two https://gregorykaqes.theblogfairy.com/28570667/not-known-facts-about-cibse-cpd