Designed with simplicity and familiarity in mind. The VRC 700 and the VRC 700f system controls have been designed to be easy to use by using a familiar menu structure it makes controlling the system easy and efficient. Intelligently communicates with all Vaillant appliances. triVAI the hybrid management system that works with aroTHERM hybrid, will also automatically choose and deliver the most efficient and cost effective appliance and crucially does not require any intervention from the end user. Compatible with the full range of Vaillant boilers. Talks to the boilers using eBUS language to fully modulate. Ensuring the boiler is always working to its peak performance. Holiday function prevents the heating and hot water coming on whilst away and reinstates it upon return. Programs stored in memory permanently, holds time and temperature programs, even in the event of a power failure. Comes with an outdoor weather sensor which constantly monitors the local environmental conditions to understand how much heat is coming into the home so the boiler can work at the optimal output to deliver the desired temperatures required.