Review on 🌬️ Filtrete Allergen Delivery Assurance by Sam Lund

They'll let some dust particles through and fill the air when the stove or air conditioner is on, but hey, they're not described as effective for everything, no matter the size . They do their job very well, but if you want dust-free, ultra-clean air, you need a more stringent (and more expensive) filter. In the winter they last about a month (it says "up to 90 days"), but that's to be expected since I have an inefficient stove that works a lot and a large house with very high ceilings. One filter a month is of course acceptable. In spring and autumn they may last 2-3 months. Summer is again about a month because the air conditioner works a lot.