MARC warns on radiator heat output claims
Manufacturers’ Association of Radiators and Convectors (MARC) is urging gas engineers and consumers to check radiator specifications carefully, warning that some products are being marketed with exaggerated heat outputs.
Manufacturers are legally required to declare heat outputs at Delta T 50 (ΔT50) for standard systems and Delta T 30 (ΔT30) for low-temperature systems, backed by an independent Declaration of Performance. However, some are quoting Delta T 60 (ΔT60) or higher, overstating performance and risking colder homes, higher bills and non-compliance.
MARC reminded manufacturers, distributors and resellers of their obligations under the Construction Products Regulation 2011. The Office for Product Safety and Standards is working with MARC to address non-compliance in the sector.
Why it matters
Exaggerated claims could lead to the wrong size radiators, causing:
- Higher energy bills because households turn up the boiler or heat pump to stay warm
- Colder homes because radiators cannot deliver the heat that is needed to properly warm the room
- Heat pumps appearing to underperform, when the real issue is radiators that are not the correct size for the room and the type of heating system
- Increased carbon emissions.
“Consumers deserve radiators that do the job they are promised. Advertising radiators using mis-stated figures is misleading and can leave people cold while paying higher bills. The heat output should be stated at Delta T 50 and Delta T 30,” commented Andy Phillips, Chair of MARC.
