ohstone,
I brew in the cold. 0F is nothing to brew in!
The thermal mass of the pot and water hold temperatures well. First, keep your grain warm. That way it won't drop the water temp when you add them. Store the crushed grain in a warm oven? Second, cover the mash with a lid of some type and cover the whole thing with a old blanket? The propane burner is hot and may scorch the blanked so use old blankets. Also, you can always add a little heat along the way to maintain temperatures. Just keep the bag off the bottom of the pot if you are blasting away because it may melt the bag?
Look at the video at the bottom of my page here.
http://www.stempski.com/biab.php
It shows how I brew in the fall or Winter season.
tap 1 Raspberry wine
tap 2 Bourbon Barrel Porter
tap 3 Czech Pilsner
tap 4 Triple IPA 11% ABV
Pipeline: Mulled Cider 10% ABV
http://cheesestradamus.com/ Brewers challenge!
