15584, 15438, 15520, 14432, 14502, 14503, 14551, 14541, 14542, 16472: Should I place this Full HD Indoor Antenna horizontal or vertical?

The Flat Indoor Antenna has a very wide angle of 360 degrees, and therefore does not need very precise adjustment like with a loop antenna. Also the single patch type eliminates the need for vertical placement for vertical broadcasting.