We are joined by Richard Burrows from Mid Wales Plumbing and Heating Supplies who is an expert on heating control strategy. Richard talks about the types of modulation - load compensation and weather compensation and how all boilers should be controlled this way. To understand modulation I have written an article with a funny analogy here With advice about turning boiler temperatures down for combination boilers 'combis' Richard chats about heating systems using cylinders and how the outdated practice of piping up S and Y plans is scuppering  efficiency.  Great episode this Support the show