@Linda67221591 @deedragall0 @dgurdasani1 @Parents_Utd @PeterHotez @trishgreenhalgh @globalhlthtwit @Meir_Rubin @OneVoice_Group @Daltmann10 @Zubhaque @SGriffin_Lab Ventilation is driven by pressure differences and they are created by temperature differences (hot air rises) and wind. So for the same size gap you get more flow when there is a bigger temp difference between indoor and outdoor or there's a higher wind speed.
@Linda67221591 @deedragall0 @dgurdasani1 @Parents_Utd @PeterHotez @trishgreenhalgh @globalhlthtwit @Meir_Rubin @OneVoice_Group @Daltmann10 @Zubhaque @SGriffin_Lab So a fairly small gap in winter can give you as much ventilation as fully open window in summer. It is hardest to ventilate when its a warm still summer day with no difference in temperature and no wind.
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