We have been using the Allergen Defense filter for over a year and I have noticed a dramatic reduction is the particals of dust in our house. That means less time I have to devote to dusting the floors and furniture.
We've been using The Filtrete Allergen Reduction filter #12 for about 6 months now and it does seem to be helping us with our allergies by cutting the amt. of allergens in the house. The Filter also fits perfectly so there is no noise from an ill fitting filter...we've had this problem in the past, but not at all with Filtrete. The dimensions are exactly what they state. Excellent filter. High recommend it.
I bought the 4" filter for my heat pump and it is working great. No loss of air flow and is removing the dust from the air. Will buy another one when it needs replaced.
This filtering system is wonderful for our basement. We have two plant tables in the winter that are over 6' long, and the Filtrete really clears the air!
We use to buy the "cheap" drug store air filters and thought they were doing a decent job of filtering. Since we changed to Filtretes our house is cleaner and my furnace internals stay cleaner.
I have been using Filtrete filters to reduce the allergens in the air for the past 5 years. They have significantly reduced the particles in the air that had been causing my wife to have various allergic reactions, including coughing, watering and itching eyes and general difficulty breathing. I certainly will be continuing to use them from now on!