Hello, I recall seeing some thermometer-related discussions, but I can't quite find them. My understanding is that you can use your fireplace much more efficiently with it. So, I think that I want to install a thermometer on our QF-7100. But I'm wondering: (1) how do you utilize the reading to control the operation? In other words -- how do you use the device? (2) what kind is recommended, and where do I get it? (3) how/where do I install it on the fireplace? Thanks in advance, Zevi.