What is hot-water comfort (CW class)?
The CW class (CW3 to CW6) indicates how much hot water a combi CV-ketel can supply at once — important for showering and tapping.
The CW class (comfort warm water) runs from CW3 to CW6 and indicates how much hot tap water a combi CV-ketel can deliver. CW3 suits a smaller household with one shower; CW4 and CW5 offer more comfort with simultaneous showering and tapping; CW6 is intended for larger homes with multiple bathrooms. Too low a CW class means cold water with simultaneous use; too high is unnecessarily expensive. We calculate the right comfort class based on your home and family size — so you choose a Remeha CV-ketel that fits daily use.