How often should I clean my bathroom exhaust fan?

You should clean your bathroom exhaust fan every 3-6 months to maintain proper ventilation and prevent moisture problems - this is especially important in Ottawa's humid summers and cold winters when proper bathroom ventilation is critical for preventing mold and ice damming issues.

Regular cleaning of your exhaust fan is one of the most overlooked maintenance tasks that can have a big impact on your bathroom's health. A clogged fan can lose up to 50% of its efficiency, leading to excess moisture that promotes mold growth, peeling paint, and even structural damage over time. In Ottawa's climate, where we deal with significant temperature swings and humidity changes, a properly functioning exhaust fan is your first line of defense against moisture-related problems.

The cleaning process is straightforward but requires attention to safety. First, turn off the power at the circuit breaker - never just use the wall switch, as you'll be working with electrical components. Remove the fan cover (usually held by spring clips or screws) and vacuum out the accumulated dust, lint, and debris. The fan blades and housing should be wiped down with a damp cloth, and if the cover is particularly dirty, it can be washed in warm soapy water. While you're at it, check that the exterior vent hood isn't blocked by snow, ice, or debris - a common issue during Ottawa winters.

Signs your fan needs immediate attention include reduced airflow, unusual noise, or visible dust buildup on the cover. If your mirror still fogs up significantly after a shower with the fan running, or if you notice condensation on walls and windows, your fan may be undersized for the space or need professional attention. The Ontario Building Code requires bathroom fans to move at least 50 CFM (cubic feet per minute), but many older installations fall short of this standard.

Professional considerations come into play if you discover the fan motor is failing, if there are electrical issues, or if you're dealing with a roof-mounted unit that's difficult to access safely. Any electrical work requires proper permits through the Electrical Safety Authority (ESA), and working on roof-mounted units during Ottawa winters can be dangerous. If your fan is more than 10-15 years old and showing signs of wear, upgrading to a newer, more efficient model can significantly improve performance while reducing noise and energy consumption.

For a comprehensive bathroom renovation that includes proper ventilation planning, contact Justyn Rook Contracting for a free consultation - we ensure all ventilation meets current Ontario Building Code requirements.