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re: emergency hot water
17 sep 2004
daestrom wrote:
>"bead runner" wrote:
>> ...if i
>> 1. turn off the cold water supply to the water heater.
>> 2. open the drain to the water heater.
>> 3. plumb from the drain to the hot water outlet.
>> 4. use propane or other heat source(wood ?) and
>> heat #3 above will it thermo siphon the water in the water heater ?
>> 5 after filling the water heater with warm water we will turn the cold
>> supply back on and use the hot water.
>
>if you're in fl (as i suspect from your message), then i further *assume*
>that your hw heater is on the ground floor. so you would have very little
>difference in height between the hw heater drain and the heat source. so
>no, thermo siphon won't work very well with this. the heat source needs to
>be several feet *below* the tank to get any good circulation.
bead might put a washtub full of water on the floor with 2 50' soft copper
coils in it, one connecting the drain to the water heater outlet and the
other connecting the generator exhaust to the outdoors...
>if you're not careful you can heat the water past boiling. normally, the
>tp safety valve on a hot water heater provides protection from this. but
>if heating outside of the tank.... boom!
not if the washtub water boils first.
nick
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