Programmable thermostats

[Armo74]

Just one more question on this subject, what might you need a permanent live for?
Again thanks very much for the responses.

 

[Mike Jackson]

To stop the missus changing the settings.

Generally required for the receiver.

 

[petercj]

The receiver has to receive signals from the sender and switch power on and off, and it needs power to perform such functions. The sender is powered by batteries.

You can get a receiver now that will take signals from the Internet which have been sent via an iPhone if you want to wind up your other half from the office.

If you don't tell her how it works, she'll think the place is haunted! lol