Depends on if your mash tun is inside or outside(cold). I go about 5-7 degrees hotter than what the software calls for, pour in the water at say 168 deg and put the lid on for ten minutes. The cold mash tun should absorb about 5 degrees or so. Once the tun absorbs all the heat it can you should be near 162 or so, then add grains and it will drop another 5-10 degrees to your mash temp. If its too high stir or add ice. Too low and you have a problem, unless you can heat your mash tun. Good luck, experience will tell you what works for your system.
EZ BREWING CO. - No Stress -- Just Do Your Best !
Chuck Norris is the only person to ever beat Andre the Giant in a drinking contest. And he did it by a two case margin.