Follow by running hot tap water for at least to seconds. Horizontal bars form the main design of the stelrad caliente creating a sleek and stylish look - perfect for bathrooms and living areas alike! Enter your postcode to see if you qualify. How can we make our services more useful for you? Boilers that are over ten years old waste a lot of valuable energy and convert as little as % of the fuel they use into heat, which has a big impact on your.