Originally Posted by n4yqt
Trial and error. If you are not having any problems right now, leave it alone. Otherwise, install the antenna as high as you can.
Problems are hard to define when you're in a fringe location.
There is actually only one channel that makes me think there is a problem. At my old house, with this same rig, I was able to get our nearest CBS affiliate WTAJ (40 mi) rock solid through major foliage and the wrong side of the hill. At the new house there is a lot less in the way and we're on the right side of the hill, and the channel is difficult to tune. We're talking a two degree range on the rotator to get it stable.
While the transmitter is not perfect, all of the antenna tools (TV Fool, AntennaWeb, etc.) say I should have no trouble with this channel.
I am planning at some point to get a wall mount kit and go higher with the antenna. Right now it is just sitting on top of the back porch. Considering this is western Pennsylvania (hills, trees, more hills, more trees), and some of my signals are 60 mi away, it actually performs incredibly well.