On the Internet, inverter convectors are advertised with might and main, allegedly saving up to 70% of electricity.
Maybe I don’t understand something, but it seems to me the laws of physics say that this is impossible.
In the inverter convector, in fact, there is no inverter, but there is simply a five-stage power control of the heating element (most likely this is a conventional triac power regulator) and a processor that automatically switches power modes depending on the external temperature.
As far as I understand, the way to control the heating element cannot save electricity: in order to raise the temperature in the room, for example, by 10 degrees, you need a certain amount energy and how not to control the heater (at least turn it on and off at maximum power, at least change the power smoothly), the number of kilowatt-hours spent on heating should not change.
It's the same with maintaining the temperature. The number of kilowatt-hours spent on this depends on the thermal insulation, or rather on the heat loss at home and hardly depends on the way the heater is controlled.
I do not mind the smooth electronic control of the heater. This is good and useful (and the load on the network is less when operating at reduced power, rather than turning on and off at full power, and the room temperature can be held more accurately, and probably the convector body can heat up less), but in my opinion there is something wrong with the promises about saving electricity up to 70% then. Or not?
© 2021, Alexey Nadezhin
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