General description Designed to fit perfectly beneath windows, this anthracite steel under window towel radiator features an extra wide towel rail at 1000mm wide and 800mm tall. With a powerful heat output of 594W (2026 BTU/h @ Delta 50), it efficiently warms your bathroom while providing ample space for drying towels. The sleek anthracite finish offers a modern, sophisticated look that complements any décor.