Bruce
TVWBB 2-Star Olympian
Only way to truly measure the temps is an IR gun or remote grate level thermometer. The lid thermometers are not made to be highly accurate and a lot has to do with where it is placed. And larry is correct about the size of the grill. Open a Q100 at 500 degrees and you get a heat wave. Open a Summit 670 at 500 degrees and you raise the temps in the neighborhood by .87 degrees.