I have been considering installing a couple of 8" duct booster fans in my attic attached to vents at the top of my screen porch ceiling to blow some of this much cooler air into the attic. This section of the attic is in an addition (about 16' x 25'), that is blocked off from the main attic of the house by a sheet of OSB. It has ridge vent and soffit vents but is still hot as hell. It just happens to be my wife's dressing room and parlor (yikes).
Are there any potential problems with this application? It would create a positive pressure in the space theoretically assisting the removal of existing hot air, and the air being brought in is much cooler than the air in the space. There is are two long duct runs that terminate in this room as well so the decrease in temp will help out in heat transfer to the ductwork as well as the room below. Any thoughts?