In other words the model ‘number’
In other words, the model ‘number’ is not always an indication of heating output, although it occasionally is (confusing we know) to make sizing clearer, we have included a separate column called ‘heating output (size)’ which lists the actual heating output. Replacing your boiler is a big purchase decision, one which you shouldn't consider without understanding what's best for you and your home here are a few things to consider when booking a quote with us. Replacing.