intake are fans that draw air into your case from outside , exhaust are fans that blow air from inside your case to outside
according to your case specs this is what you have
FRONT, 1 X 140mm
REAR, 1 X 120mm (included)
SIDE, 2 x 120mm, 1 x 200/230 (2 x 120mm included)
TOP, 2 X 200mm (1 x LED 200mm included)
the rear 120mm will be exhaust
the top 200mm will be exhaust
the side can have either 2x120mm fans which is what i thought you were talking about replacing or 1x200mm fan or 1x230mm fan this should be intake
the front has 1x140mm fan which should be intake
you have positive air pressure so that will reduce dust intake
intake or exhaust is determined by which way the fan is facing , either sucking in air ( intake ) or Blowing out air ( exhaust )