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Re: [compost_tea] Re: Copper heating element



Hi Jason   You and others might do better to start with an efficient 80 gallon hot water heater that puts and holds all the heat in the water rather than in the surroundings.  Then fill your tank 80 gallons short of full with typical 52 F well water.  Add 80 gallons of 160 degree hot water and you are going to be at  70 degrees right away and ready to start the brew.  No 2 day wait for the water to heat while the brewer tank loses about half the heat you are adding.   A gas fueled HWH would be economical. compared to electric if you can use gas. 
 
Heat loss in the 24 hour brew will be partly offset by microbic heating.  An air driven  brewer will cool some.  good in summer.  Can be offset in winter with in-tank heater.  External heaters are gong to put some heat in the tank and some into the surroundings.  Not very effective.  Defroster cable used to de-ice roof edges can be used by closing the thermostat.
 
It won't take much heat to keep the system warm.   Bob.      

Jason Austin <jason.austin@shaw.ca> wrote:
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