How To Improve Air Quality In Home

How To Improve Air Quality In Home: Practical Steps for a Healthier Living Space

Canadians spend approximately 90% of their time indoors, which means the air inside our homes has a direct impact on our comfort, productivity, and long‑term health. The good news is there are many things we can do to boost indoor air quality without breaking the bank or embarking on a major renovation. Below is a step‑by‑step guide that combines proven science with easy‑to‑implement actions.

Understand the Sources of Indoor Pollution

Before you can improve air quality, you need to know where the pollutants are coming from. Common indoor contaminants include:

Dust and allergens – pet dander, pollen, and dust mites thrive in carpets and upholstery.
Biological growth – mold and mildew develop in damp areas such as bathrooms, kitchens, and crawl spaces.
Combustion by‑products – smoke from cooking, candles, or a wood‑burning fireplace releases fine particles.
Volatile organic compounds (VOCs) – paints, cleaning agents, and certain furniture off‑gas chemicals.
Outdoor pollutants – pollen, vehicle exhaust, and wildfire smoke can infiltrate through doors and windows.

Identifying the biggest contributors in your home helps you target the most effective solutions.

Step 1: Increase Ventilation

Use Mechanical and Natural Airflow

Fresh air dilutes indoor pollutants. Open windows for at least 10–15 minutes each day, especially after cooking or showering. If outdoor air quality is poor, use a heat‑recovery ventilator (HRV) or an energy‑recovery ventilator (ERV) to bring in filtered fresh air while retaining temperature control.

Control Humidity

Keeping indoor humidity between 30% and 50% discourages mold growth and reduces dust mite activity. A hygrometer can help you monitor levels, and a dehumidifier is useful in basements or crawl spaces. Free Guide — Is Your Crawl Space Making Your Family Sick? The 4‑Stage Warning Sign Checklist can help you spot hidden moisture problems that may be compromising your air.

Step 2: Upgrade Filtration

Choose the Right Air Cleaner

HEPA (high‑efficiency particulate air) filters capture 99.97% of particles as small as 0.3 microns, making them ideal for allergens and dust. If you have pets or live in a high‑pollen area, consider a portable HEPA air purifier for bedrooms and living rooms.