System is a EHERMS. It recirculates through a coil but it is not hotter at all. The old system was a cooler and kettle, batch sparge. The only part I wonder about is after my mash of 60min I raise the temp on the PID to mashout. Well it takes awhile(15-20min) for the wort to get up to temp but the temp in the HLT only takes about 5min.
My water is really low on all numbers but I build it up for every batch. Calcium is about 50ppm for every batch.
Probably the least important part of the mash, for most people. However, some get a lot of conversion during the mashout due to poor conversion during the main mash.
Yeah I get around 95% efficiency.
That's interesting, I was going to ask if you had low efficiency, thinking that you might be having incomplete conversion... Have you ever checked conversion % before the mashout? Maybe you are getting a lot of conversion at higher temperatures, during your mashout, leading to low fermentability.
Also, how are you calibrating your thermometer? I use a lab thermometer that I've checked the calibration of in ice water and boiling water once, then I re-check it in the boil during each brew day.