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Old 01-30-2014, 12:18 AM   #1
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Default Mash Temp Control

Howdy! I've got my first ever batch in bottles, and the second in the fermenter. Starting with 1 gal BIAB kits from the local homebrew shop. I am having trouble maintaining 150-155 degrees on my stovetop. It's a glass top stove. Any advice? Thanks in advance!

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Old 01-30-2014, 05:04 AM   #2
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For that size batch, use the oven.


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Old 01-30-2014, 02:03 PM   #3
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Here's what i do. .. the bigger pot on the bottom is full of water and the smaller mash pot is floating in it. Heat it with the mash pot floating in the water. When you mash in at correct temps, Put the lid on the mash pot and cover it with a blanket or 2. I've had pretty good luck doing this

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Old 01-30-2014, 02:35 PM   #4
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Another vote for the oven.

I've only done a couple 1-gallon BIAB batches, but so far, I've been nailing my temperatures dead-on. I heat my strike water up to temperature and dough-in, stirring well until the temperature is perfect. Meanwhile, I preheat my oven. My oven's lowest setting is 325° F, but it shows you the current temperature as it's heating up. Once it hits 170° F or so, I turn it off. Once my mash is at the right temperature, I put the lid on and move the whole thing into the (now off) oven. I figure the oven loses a few degrees opening and closing the door, so I turn it on again briefly to get it back up to 150° F.

An hour later, things have cooled down a bit, but my mash is still within 1°.

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Old 01-30-2014, 05:50 PM   #5
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I wrap my MT in my quilted winter hunting coat for the 1 hour mash. Even gains one degree with some 3-3.5 gallons of mash in my 5 gallon kettle.

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Old 01-30-2014, 05:59 PM   #6
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+3 for oven , that's what I do for my smalls

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Old 01-30-2014, 06:11 PM   #7
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+1 to wrapping in a coat or blanket. I did a 90 minute mash last night (5.5 gallon batch), wrapped it in a blanket and it only lost 1 degree. I use a stainless steel kettle for my tun.

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Old 01-30-2014, 06:25 PM   #8
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Whoa, 5.5 gals is a different discussion !
Bigger the volume , some insulation , I can hold a 2 degrees over 60 mins.
A 1 gallon batch is a different game, the oven won !

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