Can anyone recommend a wireless relay to trigger an oil boiler. Currently there is a huge buffer tank which is heated by a log fired biomass. The boiler is being replaced with an oil boiler, but the buffer tank is staying, as the tank was installed during a renovation which means the tank would need cut up. Getting additional cables to the boiler isn’t an option, so I need a wireless relay that will trigger the boiler via a cylinder thermostat. I know Danfoss make a wireless cylinder stat, but the buffer tank won’t allow the fitting of a strap on stat, so I need to fit a stat inside a pocket. Any recommendations?? Ta