Wouldn't it still be relative? It would have the same efficiency on the motor and insulation. Both together would work less at a warmer tempeture.Stux said:And I think the maths goes completely out the window if you're going to run a temperature controller
In my younger years when I done my trade, I was a Sheet metal worker who specialised in air conditioning. There was 1 rule I remember my boss saying. That for every degree of coolness you require from ambient is a factor of power. I've found a freezer normally set at -18, being set at 4 using a stc-1000 will use approx 1/2 the power. So in the above example the $31 power cost difference becomes $15.50. We can relate that power usage back to the difference against ambient temperature rule. Say ambient is 25c, and fridge at 4c. So it needs to cool 21c difference. With ambient at 25c and fridge at -18 (typical freezer temp) we have a difference in temperature of 43, which is basically double the 21c difference at fridge temps, and that corresponds to my findings with the power meter.