Hello! We have a 1920's bungalow that is two stories without an attic. The second floor has dormers and gets quite hot in the summer. We are interested in installing a whole house fan but I'm not sure it's possible without an attic? We have a flat ceiling in the very center of the second floor that has a venting skylight and then available ceiling space beside it. Is it possible to install a whole house fan directely venting out the ceiling to the roof? We are in Boston, MA. Thanks in advance!