On 6/10/2014 9:02 AM, trader_4 wrote:
On Monday, June 9, 2014 9:52:44 AM UTC-4, bob haller wrote:


how much electric would it take to keep the water hot in a vacuumn bottle.???



amost none. so insulation might help a lot, saving most of the energy you want to save by turning one water heater off, while still having the capacity

Another way of looking at it, compare it to an attic. In winter, the
attic could be 20F, while the heated air below is 70F. That's a 50F
temp delta and the sound science says having 12" of insulation makes a
substantial difference versus 4" of insulation. With a WH set at 130F,
sitting in a basement that's 55F, you have an 75F temp delta, 50% higher
than the attic example.


I'm thinking he should replace the 50 gallon water heater with a series
of vacuum bottles wrapped in 4" of insulation.