Does anyone in the forum know of a site that is known to give accurate estimates of radiator sizes? I have looked at a couple, put in my data and end up getting different answers, one site does not even take account of insulation and other factors. My house was built in 1997 and I am sure the builder simply put in what he thought was right based on raw room sizes. I have a couple of rooms that I know could do with more powerful and efficient radiators but it is not a major issue at present. However, I am now into my 19th year of use and know my boiler will need replacing before long and it seems sensible to replace one or two radiators with ones that are more efficient. Finding out the correct size is not as easy as I thought.
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