|
|
re: energy-sucking waterbeds
2 jul 1997
thomas patrick montoya wrote:
>if you have a waterbed, that will run you $10-20/month depending on size
>and electric rates...
that does seem like a lot. how warm are they, 95 f in a 70 f room? a 6'x8'
waterbed with no insulation underneath and a sheet on top might lose about
(95-70)6x8x2x1.5 = 3600 btu/h, over a kilowatt, something like $1,000 per year.
adding 2" of foam ($20) between the heater and floor and a 3" quilt ($500? :-)
on top might lower the power to about (95-70)6x8x2/r10 = 240 btu/h when not
in use, about 70 watts or $70/year at 10 cents/kwh.
turning off the heater and sleeping under the quilt for 8 hours per night
would make the bed temperature t, where 8hx300btu/h = 24h(t-70)6x8x2/r10, or
t = 80.4 f. this might also save ac power in summertime, without the quilt.
nick
|
|
