Looking for a 250 - 500 thermostat for an older Breckwell Big E pellet stove. Breckwells web site says "For stoves manufactured in 2008 or older you will need to have a 250 or 500-millivolt thermostat. The 750 millivolt thermostats do not work well with these stoves. There are a few on the market that will work, but you will be much better off getting a 250 or 500 millivolt thermostat for these older pellet stoves." I have seen other posts that say any millivolt thermostat should work and the truth is they absolutely do not. I use a Honeywell CT30 on a Breckwell P22 and it works fine, but the same thermostat does not work on the Big E ---- has to be 250 to 500 mv.