Humidity is where mould, odour and pests begin. What works without a dehumidifier, and when you actually need one.
Opening windows during rain lets humid outdoor air in. Open them briefly when the rain has stopped and outdoor humidity is below indoor โ usually there is such a window during the day. A cheap hygrometer lets you decide by number rather than by feel.
Moisture builds first where air pools: wardrobes, under beds, under the sink. Simply moving air with a fan or circulator cuts mould dramatically at the same humidity. Keep furniture a few centimetres off the wall and leave wardrobe doors ajar now and then.
Dry mode on an air conditioner pulls moisture without cooling much, which suits the rainy season. If whole-home humidity stays above 65% for days, a dehumidifier is more efficient. Run it in a closed room, and empty the tank daily or it becomes the smell.
Drying laundry indoors raises humidity sharply. An extra spin cycle and a fan blowing directly on the rack nearly halve drying time. In the bathroom, squeegee the water after a shower and run the extractor 20โ30 minutes longer โ the surest mould prevention there is.
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