These heaters raise a room’s temperature by burning gas to form carbon dioxide and water vapour. But, as with other sources of moisture, the warm air tends to migrate to colder areas of the house where it comes into contact with cold surfaces and condenses. Mould alert! So, provide ventilation where the heater is being used to replenish the oxygen levels.
Plug-in dehumidifiers are an option where ventilation is difficult, as they remove up to 12 litres of water from a room in 24 hours. However, make sure you keep an eye on the reservoir so it doesn’t overfill.
When damp air comes into contact with a cold surface, or enters a cold room where the dew point is lower, condensation occurs as water vapour turns into droplets. If this continues without drying out, mould forms. While moist air occurs in warm parts of the house, it will often move to colder areas, such as bathrooms and bedrooms, and condense there. So, try to limit water vapour or steam in the air. Have shorter showers, use an extractor fan in the bathroom and vent clothes driers to the outside. Once condensation is controlled as much as possible, clean the mould with anti-mould solutions, then repaint with mould-resistant paint.
The combination of damp and still air, together with leather and fabrics, makes wardrobes a Mecca for mould growth. Handy containers of moisture- absorbing crystals will do the trick. Just place at the bottom of your wardrobe and check, over time, for accumulated water. When full, either refill or replace. Alternatively, use heating rods, which plug into the power, to keep an ambient temperature above dew point so water doesn’t condense.