Besides purifying your air with the help of particular devices, you can also improve the air quality in your home with these methods: 1. Clean your home frequently (remove dust, debris, pet hair, and odors); 2. Allow fresh air to come in from the outside (unless you live next to a significant source of air pollution); 3. Remove pollution/contamination sources (restrict pets to just a part of the house, restrict smoking in the house, etc.)