Laundries generate a lot of moisture — from washing, drying and damp clothes — and need exhaust ventilation to clear it, or mould and damp follow. Here’s why, and how to choose and install a laundry fan.
Why Laundries Need a Fan
The laundry is one of the wettest rooms in a home — the washing machine, drying clothes, and damp washing all release moisture into the air. Without ventilation to clear it, that moisture builds up, raising humidity and settling on walls, ceilings and inside cupboards, where it feeds mould and damp. An exhaust fan removes the moist air, keeping the laundry dry. While laundries aren’t always subject to the same exhaust requirements as bathrooms, a fan is a sensible and often necessary addition for moisture control.
Moisture and Mould
The link between laundry moisture and mould is direct: moist air with nowhere to go condenses on cooler surfaces and feeds mould growth, exactly as in a poorly ventilated bathroom. If your laundry develops mould on the ceiling, walls or in cupboards, inadequate ventilation is the usual cause. An effective exhaust fan, used while generating moisture and venting it outside, breaks this cycle by removing the moist air before it can settle. See our condensation & mould guide.
Choosing a Laundry Fan
Choose a fan sized to the laundry’s volume and moisture load — a laundry where clothes are dried indoors needs stronger extraction than one used only for washing. Look for a fan that moves enough air for the room, is reasonably quiet, and ideally has a timer or humidity sensor so it runs long enough to clear the moisture. A fan that’s too weak won’t keep up. See our sizing and timer & sensor guides.
Venting Outside
A laundry fan should vent outside, not into the roof cavity. Venting into the roof simply relocates the moisture into the roof space, where it causes condensation, damp and mould in the structure — a common but poor practice. Ducting the fan to discharge outside (through the roof or an external wall) removes the moisture from the building entirely, which is the whole purpose of the fan. We always vent fans outside. See our venting guide.
Installation
We install, replace and repair laundry exhaust fans across Melbourne — sized for the room, ducted to vent outside, and with timer or humidity-sensor control where useful. Whether you need a fan fitted where there isn’t one, or an old, weak or noisy fan replaced, we can recommend and install the right solution. Call 0431 918 137 or request a quote. See our installation cost guide.