"terry" wrote in message
...
Discussion recently someone claimed to have used a 40 US gallon
electric hot water tank to heat a small living space by piping its
output to a couple of radiators or hydro baseboards. It was AIUI a
converted single bedroom cabin?

Presumably the hot water heater (tank) would have two 3000 watt
elements. So 6000 watts would provide approx. 18,000 BTU or so of hot
water per hour.

I "can" work, but is certainly not the best method. If you are using that
much electricity, why not just use electric baseboard and remove the need
for circulating water?