When it comes to improving indoor air quality, there are three main strategies: source control, ventilation, and filtration. Think of these like layers of protection—each one helps reduce the amount of harmful material floating in your air.

Source control means removing or reducing things that release pollutants in the first place. For example, switching to non-toxic cleaning products, sealing off mold sources, or choosing low-VOC materials when remodeling. It’s the most effective and lasting approach.

Ventilation is about bringing in fresh outdoor air to dilute what’s inside. This can work well—if the outside air is clean—but it’s not always practical in areas with high outdoor pollution, allergens, or extreme weather.

That’s where filtration comes in. By capturing pollutants already in your indoor air, filtration acts like a cleanup crew—removing fine particles, allergens, and some chemical residues. When the other two strategies fall short, filtration picks up the slack.