You will want to use at least one winter and one summer design days.
This answer should be of interest: https://unmethours.com/question/16698/which-cooling-design-day-is-most-common-for-sizing-rooftop-units/
I might add that ashrae appendix G specifies 3 design days that you must use (90.1-2010 says from memory something like 99.6% condns DB (winter), and for summer the .4% DB=>MWB and .4% WB=>MDB)
, don’t quite me on this and double check).
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Sent from a mobile device, please excuse the brevity.Julien Marrec, EBCP, BPI MFBA
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Le 20 févr. 2018 à 22:19, my_sunny_night@xxxxxxxxx [EnergyPlus_Support] <EnergyPlus_Support@xxxxxxxxxxxxxxx> a écrit :
Hello All,
I want to use design day for HVAC sizing calculation; But I am not sure which design day I should use from the .ddy weather file.
Any help would be appreciated.
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Posted by: Julien Marrec <julien.marrec@xxxxxxxxx>
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