Although indoor air is often more polluted than outdoor air, sometimes opening windows can let in unwanted allergens and irritants.
- If you are allergic to pollen or mould or affected by outdoor pollution levels, monitor forecasts through your local weather channel or online at www.weather.ca
- When pollen, mould, or pollution levels are high, it may be more important to keep your windows closed than to ventilate your home.
- Pollen levels tend to be higher in the morning, whereas air pollution levels tend to build up to higher levels in the late afternoon.
- Pollen levels are higher on warm, sunny, windy days.
- Smog alerts often occur on hot sunny days.
- Although pollen levels drop on rainy days, wet weather can lead to increased outdoor moulds.
- Air conditioning can be helpful to reduce your exposure to pollen and air pollution on hot days, as well as reduce your indoor humidity.