The room I bought this radiator for is heated by one central heating radiator but it has 3 outside walls. This product couldn't heat the whole room by itself but what it does is boost the temperature while the heating is on and keeps the warmth stable. If the central heating turns off then this radiator will help keep the room warm for over an hour all by itself. I like it. But before you buy this particular product check out the size of your room. I am still wondering whether I should have gone for the next size up.