I have a few questions about setting the temp on the OWB. The first two years I've lived in my current home and used my OWB my temp was always set at 180 using the factory thermos disc. last year after I reinsulated it and hooked up the ranco I ran at 170 with a differential of 7. Burned great all year(80% oak and maple). This year I added some insulation used on nuclear power plants thinking it will be even better. They claim 2000 degrees on one side and u can touch the insulation with your hand and not feel any heat. Anyway, this year I set my aqua stat at 190 with a differential of 5(mix of cherry, beach, soft maple, not really seasoned 100%). I don't really see much a difference running 190. May I add I also swapped from a gundfos 15-58 running on medium to a 26-99 running on medium. This year has been very mild and it seems like I'm during more wood. I don't believe its the insulation because I still using the same insulation as last year just added to it. So my question is, is it because I'm running 190 and the differential is only at 5 or am I circulating water to fast? I am around 50 feet away so a total of 100 feet loop. Sorry for the long winded stuff but you guys are great on here and thought id give as much info as I could. Thanks.