If you’re planning to replace a boiler with a heat pump, it’s worth noting you may also need to replace some of your radiators, if they are unlikely to be compatible with your new system. However, you won’t necessarily need to replace every single radiator in your home. Some existing radiators may already be large enough, but others might need upgrading to deliver enough warmth at the lower water temperatures that are typically used by heat pumps.
Before recommending a system, a heat pump installation specialist should calculate how much warmth each room loses on a cold day and compare that figure with the radiator's output. They’ll also consider the heat pump’s proposed flow temperature, the size and construction of each radiator, and whether the existing pipework can carry enough heated water around the property.
