My mash tun is a picnic cooler.
I thought it was well insulated.
I have mashed with it a few times.
I have lost a lot of heat out of it.
The mash temp may be 152 degrees when I close the top.
When I open it, it’s much lower…15 degrees lower.
Just my opinion, but I am not sure picnic coolers were made to maintain high temperatures for a hour or so. On thing Mike pointed out about picnic coolers is that their covers are not well insulated. Where does heat go? It rises…and it rises right out of my mash tun.
One thing I am going to try next time to maintain my mash temperature is to put a heating pad around it and put a thick blanket on top of it to try to keep the heat from escaping.
Do you have any techniques that you would like to share about maintaining mash temperatures?