I am new to all-grain and am about to brew up my first batch within the next week or two. I have been doing a ton of research on forums, books and other reading materials and am pretty excited to start my first batch.
My question is about maintaining a mash temp if I am brewing outside in 40º weather.
I plan on doing a single infusion mash in my homemade 10G rubbermaid mash tun. I am also going to warm up the cooler first, with very hot water for 10-20 minutes before adding my strike water and grain.
How many degrees should I plan on losing per hour while mashing in the cold weather? Is there anything you guys would recommend I do to maintain a consistent temp?