That’s interesting. We do suffer with damp and are currently using a dehumidifier. We had a Mitsubishi but that failed after about four years so we’re now using a Ruby Dry. Do you use a PIV? I didn’t realise that they were so reasonably priced. Just wondering how effective they really are and how much the installation is going to cost.I think a better alternative to a dehumidifier is installing PIV, something like Naurie drimaster. People are concerned about pushing cold air from the loft space into the house and believing it’s going to make the house cold. They are great and drier air is cheaper to warm up than humid air.
the drimaster is about 18w irc, they do one with a heated element, but I would not really use one.