When intensity means time

It's widely accepted that domestic appliances are the kings of everyday misunderstadings. From video recorders to washing machines, they all share a so broad range of diferent controllers that makes semantic hard to reuse.

We all have to learn them one by one, but one it's learnt we are supposed to know how to set the devices. But there is one concern that seems still to be resolved:

How can we remove the gap between selected intensity and time to reach the expected outpout?

Most small and major appliances (specially those related with temperature) run in a nominal power, leaving the control of the result to a matter of duration in time. Some of them express clearly the final state of the expected effect in numeric indicators, such as degrees for a central heating system, and others rely on a continuous scale of simulated power variations like electric cooktops.

Although cuantitative controllers are widely present, why is still so insanely frequent that people keeps misunderstanding these stuff that they use every single day?. Some examples:

Will my air conditioning machine works faster setting a lower temperature?. It won't, because its coefficient of performance is fixed. Will the cooktop heat more at higher values? It will heat water quicker but maximun heating power is limited. In most of them the selected value of intensity means an inverse rate of time pauses between heat activations.

The solution could be to make obvious that they work at a linear rate. A good solution for cooktop could be to avoid relative numeric controllers and to ask always for the desired temperature, showing through process the expected time for reaching the goal. An easy way to accept that intensity means time when power is fixed.

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