Hi guys- quick question regarding my sons asthma. He has constant recurrent chest infections and asthma flare ups - especially during the winter months. He usually has the salbutamol inhaler for general use and prednislone when his chest is worse. I just can't figure out what triggers it off with him as one day he's fine and the next he wakes with a cough and is very phlegmy. His asthma nurse recommended a humidifier - but as we have a slight mould growth issue upstairs I'm wondering if a dehumidifier may be better? We live in rented property and don't have double glazing and our landlord refuses to pay to have it done so our windows become heavily condensates during the winter months. It's such a difficult situation as I know there needs to be ventilation but opening windows during the winter months is not something I want to do. Does anyone have any tips for how i could help his asthma? It's so frustrating for him to have a bad chest, it goes and then a week later it returns.