I can feel the difference. Every allergy season is getting better and better in my home. I feel like i can always breathe. I love this product. I love that i don't have to remember to buy filters. They are always delivered in time. I feel like i always have a True fresh filter when i place them. Overall, good, no great product and great company.
Everything fits fine thank you remodeling my house probably have to replace more often doto all the dust will give you a heads up when i run low Thanks againRudy