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Old 11-03-2011, 10:23 PM   #1
iceman1407
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Default mash tun too big?

Is there a such thing as too big of a mash tun? I have been using a 5 gal igloo and was looking to upgrade. I looked at a 70 quart cooler. Is that too big to use for higher 5 gal batches and 10 gal batches? If so, is there a rule of thumb for such things???

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Old 11-03-2011, 10:27 PM   #2
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I don't think so u should be fine I don't see a problem with that. You may have a different temp lose is all

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Old 11-03-2011, 10:30 PM   #3
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Quote:
Originally Posted by metalbrewer
I don't think so u should be fine I don't see a problem with that. You may have a different temp lose is all
Well it is one of those 5 day coolers, which is why I thought to get it.
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Old 11-03-2011, 10:34 PM   #4
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I'd be worried about 2 things: temp loss and grain-bed depth.

A 70 quart cooler will hold about a 45 pound mash full, so use that as your barometer for space used vs head space in the tun. Maybe someone smarter than me can chime in with the science behind heat dissipation to air in a closed vessel.

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Old 11-03-2011, 10:35 PM   #5
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Bigger ones just feel better. Ask your SWMBO if you dont believe me.

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Old 11-03-2011, 10:36 PM   #6
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Quote:
Originally Posted by JefeTheVol
Bigger ones just feel better. Ask your SWMBO if you dont believe me.
Hahahahahaha
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Old 11-03-2011, 10:37 PM   #7
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Quote:
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Bigger ones just feel better. Ask your SWMBO if you dont believe me.
I thought the old adage goes "it's not the size that matters but how you use it"?
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Old 11-03-2011, 10:37 PM   #8
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Quote:
Originally Posted by dcHokie
I'd be worried about 2 things: temp loss and grain-bed depth.

A 70 quart cooler will hold about a 45 pound mash full, so use that as your barometer for space used vs head space in the tun. Maybe someone smarter than me can chime in with the science behind heat dissipation to air in a closed vessel.
Yea the grain bed and extra space is what rose a concern to me too
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Old 11-03-2011, 10:46 PM   #9
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I remember reading somewhere that you want to have at least a 4" deep grain bed. Don't know if that's mostly for fly sparging or just in general. Keep in mind I'm just a beginner myself.

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Old 11-03-2011, 10:54 PM   #10
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if your batch sparging grain bed depth is not that critical. I use a 70 qt cooler for my huge 5 gal and for 10 gal batches it works just fine. you my lose a degree or two over an hour but my extreme holds temps well. For most of my 5 gal batches I prefer useing a 48qt cooler for better heat retention.

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