[BLDG-SIM] why is energy simulation better?

[mohammed samier]

hi
i am a user of energy plus
someone asked me a question which was, "what makes energy simulation(in general) better than other calculation programs ?"...frankly i couldnt find a good answer for it .. i just know it is better that is all !! but could anyone tell me why it is better?....what is the mean difference between these two programs? 
thanks for helping me
mohammed s. khaylani
msc student
U.O.T /ARCH. Dep.
baghdad
iraq

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