Install a Winegard HD7696P antenna with a Antennas Direct CPA-19 preamp , in the attic aimed at about 360 degree magnetic compass direction.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
For one Tv connected use No splitter.
For 2 Tv's connected use a HFS-2D , 2 way splitter.
For 3 Tv's connected use a HFS-3D , 3 way splitter.
For 4 Tv' connected use a HFS-4D , 4 way splitter.
Buy the HFS splitters at ,
http://www.hollandelectronics.com ,
http://www.solidsignal.com..
Here are some places to buy antennas and etc. ,
http://www.solidsignal.com ,
http://www.winegarddirect.com ,
http://www.amazon.com