When you have a device that consumes a lot of power because it is always on (think of a boiler), the smart boost timer switch from Aeotec is a good solution for this. After all, you can set that with an interval of 30, 60, 90 or 120 minutes, power is supplied with a certain interval.
You can also use the switch for other purposes because there is just 230V (this means it also works as a Z-wave repeater) and that is also what comes out on the other side. The maximum load is 16 Amps (3,600 watts), the device is equipped with an overload protection. You can also operate the device manually.
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