Clean the air in your ... through the filter is strong. Filtrete recommends changing this filter four times a year, for an annual cost of $68. The 4-inch-thick Aprilaire Healthy Home 213 MERV ...

Dust, pollen, smoke removal is how well a model cleared air of fine clay dust and cigarette ... Overall score for the 3M Filtrete Filtrete 1550 is mainly how well the model removed dust and ...