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NC-2009 IEQp1:Minimum IAQ Performance

Fresh air supply using Cooling pad in Production area

Dear all Our project is single storied sewing factory in production area we have large size Exhaust fans in one side and opposite side of exhaust fan have cooling pad Now the issue is we can't provide any fresh air fans to production area but fresh air is mandatory for IEQp1 credit But fresh air is continuously coming to room via cooling pads due to continuous exhaust in opposite side as per rule the amount of exhaust we take from room is automatically comes due to pressure variance in space so can we assume the exhaust air quantity is equal to fresh outdoor air quantity enter from other openings and cooling pads and count the same in VRP calculation for production area where no fresh air supplied mechanically but have the cooling pad with exhaust fan in opposite side is it acceptable manner if it is not accepted means why? kindly assist us to solve this issue (is these space need mechanical fans to supply fresh air )

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Mon, 03/14/2016 - 13:11

If you are drawing fresh air in from a known intake using exhaust fans, then you are mechanically ventilating the space. You need to decide which of the following you fall into: Makeup supply drawn in near to the exhaust and/or return location. (Ez value of 0.5) Makeup supply drawn in on the opposite side of the room from the exhaust and/or return. (Ez value of 0.8) Also, I assume that when you say cooling pad, you are referring to evaporative cooling pads. If that is the case, keep the following requirement in mind: 5.9 Particulate Matter Removal. Particulate matter filters or air cleaners having a minimum efficiency reporting value (MERV) of not less than 6 when rated in accordance with ANSI/ASHRAE Standard 52.2 shall be provided upstream of all cooling coils or other devices with wetted surfaces through which air is supplied to an occupiable space.

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