I recommend get a compass. When using a compass it is best to be outside because inside of buildings can effect a compass reading , the metal and wood and concrete structure effect the compass reading.
I do not recommend a antenna in a Small attic space with the metal of the HAVC heating and cooling units in there because the metal , reflects , reduces, blocks , Tv reception.
If you look at the tvfool Current Plus Pending Applications Included Tvfool radar report and channel list , you will see that the main groups of Tv stations are to the north east.
If your unit that you live in has a window or windows to the , north , north east , east , put the HDTVi at/in the window.
A , north east , window will be the best because the main group of Tv transmitters is to the , north east.
Put a Terk HDTVi antenna at/in a , north , north east , east , facing window.
Aim the HDTVi at about 50 degree magnetic compass direction.
Here is how to aim indoor and outdoor antennas ,
http://www.kyes.com/antenna/pointing.html.
I recommend do a Double Rescan , Digital Tuners can develop - Digital Glitches - that are not cleared out with a simple channel scan.
http://www.dtv.gov/rescan.html.
Yes it is Ok to try the HDTVi in the small attic space.
Postion the HDTVi so that any metal and ducting in the attic is not blocking reception to the , north east.
Also keep the HDTVi antenna away from metal in the attic as much as possible.
Higher is usually better.
Also if the attic has metal backed insulation the reception will be reduced or blocked.