Sprinklers never should be put in on the opposite storeys unless These are required for other explanations. The general facts indicated very little practical distinction between homes constructed for MVHR and those for all-natural ventilation – with the two sets hovering within the air tightness figure of 5m3.m-two.h-one @ 50Pa. https://franciscowlzob.ampedpages.com/how-much-you-need-to-expect-you-ll-pay-for-a-good-cibse-57365262