Clothes Dryers

If you have a clothes dryer, it’s important to manage both ventilation and moisture to prevent unnecessary humidity build-up inside your home. Clothes dryers—especially vented and condenser types—release warm, moisture-laden air during operation. If this moisture is not properly ventilated to the outside or diluted with adequate airflow, it can quickly increase indoor humidity levels. In enclosed or poorly ventilated areas, this creates the perfect conditions for mould to develop on nearby walls, ceilings, and even within cabinetry or insulation.

Ensuring the area is well ventilated is key. This may involve opening windows, using external vents, or running exhaust fans during and after each drying cycle. Exhaust fans help remove humid air before it has a chance to settle on cooler surfaces and turn into condensation. This is particularly important in laundry rooms that are small, enclosed, or located within the main living space of the home.

Cleaning the lint filter with every use is another critical step that is often overlooked. Lint is made up of fine fibres and dust particles that are highly absorbent and can retain moisture. If the filter becomes clogged, not only does it reduce the efficiency of the dryer and increase drying times, but it can also allow excess lint and dust to circulate within the space. This adds to the organic material that mould can feed on, especially when combined with elevated humidity levels.

It’s also advisable to avoid hanging wet washing inside your home wherever possible. As clothes dry naturally, they release a significant amount of moisture into the air—sometimes litres of water from a single load. Without proper ventilation or dehumidification, this moisture lingers indoors, raising humidity and increasing the likelihood of condensation forming on cooler surfaces such as windows, walls, and ceilings. Over time, this can lead to hidden mould growth in areas that may not be immediately visible.

By controlling moisture at the source—through proper dryer ventilation, consistent lint filter cleaning, and limiting indoor drying—you can significantly reduce the risk of mould growth and maintain a healthier, drier indoor environment.