The simple answer is yes! The larger the radiator, the more heat it can produce. Generally speaking, the bigger the radiator, the more BTUs (British Thermal Units) of heat it can create in an hour. Use a BTU calculator to work out how big your radiator needs to be. If you have a large enough space in your living room for a big radiator, you'll be able to get maximum warmth from it. However, if your space is limited or you simply don't want a huge radiator, you may want to opt for something smaller.