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hot stuff - oldbloke's mutterings
March 28th, 2011
02:56 pm
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hot stuff
So...
I'm going to make a waterbath for my fermenting vessels.
I calculate it'll have a maximum of about 45litres of water in it, less whenever there's more than 1 demijohn in there. Much less if I fill it with 4 of the things.
It'll be powered by an aquarium heater. The specs for them suggest that for >40 litres you need at least 50W.
BUT my waterbath will be insulated all over. Losses /should/ be minimal.
Tell me 25W will be OK.
Pretty please.

(8 comments | Leave a comment)

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From:jugglebug
Date:March 28th, 2011 02:17 pm (UTC)
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I will tell you anything you like but you cannot be assured I have a clue :-)
However I guess you will learn quite quickly if the 25w one isn't up to the job so as long as your design specs allow space for a 2nd one to be added in a suitable locations at a later date there is no harm in just proceeding as planned yes?
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From:oldbloke
Date:March 28th, 2011 02:50 pm (UTC)
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1x25W saves a couple of quid over 1x50W, but 2x25W loses about 4 quid over 1x50W. So, being stingy, I want to go 25 if poss but not if it might be a Mistake
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From:bellinghman
Date:March 28th, 2011 02:19 pm (UTC)
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Fully insulated, and the ferment itself will be producing a lot more heat than a few fish would do.
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From:vinaigrettegirl
Date:March 28th, 2011 03:40 pm (UTC)
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You don't want to make soup, just warm up the yeastiebeasties, so 25W should be fine.
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From:nalsa
Date:March 28th, 2011 05:14 pm (UTC)
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25W > 0W, so yes, it will have an effect.
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From:oldbloke
Date:March 28th, 2011 08:18 pm (UTC)
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Ah, but is 25W in the garage > 0W in the airing cupboard?
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From:hooloovoo_42
Date:March 28th, 2011 08:29 pm (UTC)
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Not in yer actual monetary terms. That's 25W of heat you're paying to generate.
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From:oldbloke
Date:March 28th, 2011 08:36 pm (UTC)
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If the insulation's good, it'll only switch on a few minutes a day (I hope). Pennies a week. The airing cupboard is inconsistent thanks to modern insulated hw tanks (and we'd quite like to put the towels back in there) so a nice controlled stable temp in a waterbath will sort the wine out much better with theoretical knock-on economies (not necessarily fiscal, though...)
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