Our house is quite old (in parts) with solid walls, and good double glazing, and so tends to be pretty damp. Despite leaving windows open most of the day, we have mould growing on some walls, and clothes in the fitted wardrobe in our room are mildewy .
I think we need a dehumidifier - would one big one be best, or 2 smaller ones, one for upstairs and one for downstairs? Any particular brands or features to go for or avoid? Thanks.