I'm defining cooling energy use with ideal loads in OpenStudio - EnergyPlus. First i defined a design day by the ASHRAE recommendation, so my design temperature is 32 for my location but i didn't use "design specification outdoor air". Then i put "design specification outdoor air" with a library data... and is quite bigger the energy use. I don't find yet a formula to understand the relation between "design specification outdoor air" and "design day" in ideal loads calculation. Should i always to use both input for more real cooling use definition? Anyone can recommend me some material or explanation to understand this?
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