I ordered this fan on August 31, 2014. Paid $93.30, no shipping fee. I received the fan after 10 days as it was shipped back to original shipper by UPS. When it did arrive, the box was destroyed but fan appeared to be ok. I installed it early this morning in an upstairs window in my studio. In order to install the unit, you have to mark the places on the sides where the fan will attach to your window frame. Then you must drill the four holes to put the screws into. Screws not included. After drilling, align the slots with the holes, put in screws and tighten screws. This is not difficult but you will have four holes in your inside window frame.  Took me about 20 minutes. Turned fan to exhaust hi; opened two windows; one on opposite wall about 6 feet away, the other at end of upstairs studio about 30 feet away. Let fan run for 2 hours on exhaust. NOTHING. stood in front of window furthest from unit; no air moving through window. Went to window nearest unit, no air moving through window. I turned the unit from exhaust to blow on high. You cannot even feel the air blowing 4 feet away. This is NOT A whole house fan.  very WEAK. Will never get the job done. I do not know when they changed this fan, but the reviewers on this page cannot be talking about this unit.
I ordered this fan on August 31, 2014. Paid $93. 30, no shipping fee. I received the fan after 10 days as it was shipped back to original shipper by UPS. When it did arrive, the box was destroyed but fan appeared to be ok. I installed it early this morning in an upstairs window in my studio. In order to install the unit, you have to mark the places on the sides where the fan will attach to your window frame. Then you must drill the four holes to put the screws into. Screws not included. After drilling, align the slots with the holes, put in screws and tighten screws. This is not difficult but you will have four holes in your inside window frame. Took me about 20 minutes. Turned fan to exhaust hi; opened two windows; one on opposite wall about 6 feet away, the other at end of upstairs studio about 30 feet away. Let fan run for 2 hours on exhaust. NOTHING. stood in front of window furthest from unit; no air moving through window. Went to window nearest unit, no air moving through window. I turned the unit from exhaust to blow on high. You cannot even feel the air blowing 4 feet away. This is NOT A whole house fan. very WEAK. Will never get the job done. I do not know when they changed this fan, but the reviewers on this page cannot be talking about this unit.