I got a very very small attic space. I got practically a flat roof, a 1 and 12 pitch with venting placed in the soffits. The square access register to the attic is in the back part of the house that is closed off during Florida summer months because its to costly to cool that part of the house. Anyway, a box fan will fit in that register perfectly and I'm wondering which way I should vent. Should I pull air out of the attic into the back part of the house OR push air from the back part of the house up into the attic and out through the soffits? Will keeping that attic space give me that much savings on my cooling bill? thankyou