Description
The 4 series is available in wired (RTP4+) and wireless (RTP4RF+) both featuring opentherm allowing up to 15% gas saving via a standard heating control.
We offer a printed door service where you can print your business logo free of charge on the cover (min of 10 units). Fully boiler plus compliant, the 4 series controls from. ESi are simple to use and easy to install and help you and your customers take control of rising energy costs.