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ProRad radiators are available in three distinct types to suit various heating needs: Type 11 (K1), Type 21 (P), and Type 22 (K2). Type 11 radiators are designed as slim, single-panel units, making them perfect for installation in tight or compact spaces where a smaller footprint is needed. For more demanding heating requirements, Type 22 radiators offer a more robust solution with their dual-panel construction and additional fins, significantly increasing BTU output. The Type 22 model incorporates two convectors, which effectively doubles the number of fins, thereby expanding the surface area and enhancing overall heat production. This design leads to greater projection and improved heat retention. Both the front and back panels of these radiators work together to ensure that heat is distributed evenly throughout the room, providing efficient and effective heating performance.. Prorad Double Convector Radiator Type 22 K2 (600mm High) - 600mm x 1000mm Steel 422610