Do I need bigger radiators for a heat pump?

With a low temperature heat pump, you may need to upsize your radiators to achieve the same BTU output. High temperature heat pumps are highly compatible with cast iron radiators, making this a cost-effective upgrade. By only replacing the boiler with a high temperature heat pump, homeowners can save on the added costs of a full radiator replacement. Proper insulation will also help to boost the effectiveness of your radiators and heat pump.