How A UK Radio Broadcast Controls Household Heating

For over 40 years, a radio signal in the UK has been quietly switching household heating systems on and off. It’s called the Radio Teleswitch Service, and it’s one of the best examples of hidden data riding on broadcast signals that most people have never heard of.

I explain how RTS works, how the UK approach compares to what we do in the US, and what it means that the whole thing is finally shutting down after four decades of just working.