A Combi Boiler means you have a boiler that works your heating and instant hotwater (NO Cylinder).
With a Combi Boiler you will need an
- Additional Zone Valve to control your existing radiators.
- You may need a time control to control this valve. If you already have a timeclock or programmable room stat you will be able to use this Unless it is a plugin timeclock (Part of the Boiler)