Thanks for the replies
I was asked to find the exact figures that have been stated in any standard/guideline like ASHRAE, CIBSE.etc to meet the requirement for positive pressure .
Its often said that positive pressure shall be maintained but there shall be different requirements for each...
I would like to know what the minimum air velocity should be to maintain positive pressure at the entrance of a typical retail shop in a big shopping mall
I know positive pressure would occur as long as the supply air rate is larger than the return air. However, is there any standard/ guideline...
