Just an update. Flame King removed the 5000 BTU-10000 BTU line from the product listing from both their website and Amazon. There's no switch for low to high, just a dial for the thermostat. It's now listed as 10000 BTU only. I'm sending it back. It throws out a lot of heat but it's going to gobble propane. Also, last night I lit it and had it going for a while then dialed the thermostat back. It shut down to the pilot light but it didn't relight itself properly on a lower setting. It tried to light but the flame was just flickering over the ceramic panel and never turned it red