Fresher air is a breathe away with the Holmes HEPA-type Air Purifier with Visipure filter viewing window. This air purifier removes up to 99% of air pollutants and traps 30% more dust and particles from your home. Ideal for small rooms up to 132 square feet. Visipure filter viewing window allows you to see when its time to replace your filter. Uses Aer1 filter, the most effective filter technology available, enhanced with ARM & HAMMER baking soda to help eliminate odors; Optional ionizer assists in particle removal; 3 speed settings to keep air fresh and pure; Filter change reminder setting; Recommended for rooms up to 132 square feet.