The actuators and controllers will still consume power. But you can do without that, right?
Ah, I wouldn't have expected that. So the thermostats might consume about 0.5-1W, sure. But that the motors also have a "standby" current or regulate something even though there is no demand? Important note. Thanks!
It helps to look at the technical data here. After all, every engine is different. But yes, Bookstar described it correctly. Depending on how many you have, it can add up to a substantial amount.
Assuming the heating is set correctly (flow etc.), can't you just turn all the controls up full? Wouldn't that be "easier"?
depends on the motor and valve. there are ones that are normally off when open, and ones that are normally off when closed. cheaper is normally off when closed, therefore the motors run, colloquially, at full load if the valve is permanently open, because the motor has to hold the valve open against the spring force. 1 watt per motor. you can calculate that up.
No, he means cheaper in operation. Since the motors only need electricity during the heating period. Unless you try to cool through the underfloor heating in summer, then it doesn't matter which one you choose as they operate all year round.