"terry" wrote in message
...
Our very conventional old style tumble dryer timer runs for some 45
minutes per load.

With heater cutting in and out (estimating it's on say 80%?).

Heater elements are either 3000 watts or maybe 4500, haven't had this
one apart yet, since I got it in exchange for a dozen beer!

Our domestic electricity costs a little over 10 cents per k.watt hr.

So one load of clothes 45/60 x 0.8 a cost of electricity = 0.75 x 0.8
x 0.12 = 7 cents per load.


I think your math is wrong.
I'll split the difference on the heating element
wattage and call it 3750 watts.
If you ran it 1 hr that would be 3.75kwh.
But, you only run it 45 minutes. so 45/60 x 3.75 = 2.8125kwh
And, it's only on 80% of the 45 minutes.
So, .8 x 2.8125khw = 2.25kwh
Then 10 cents x 2.25 kwh = 22.5 cents
Mike