Holmes® Tower Air Purifier with Visipure™ Filter Viewing Window Holmes® Tower Air Purifier with Visipure™ Filter Viewing Window The aer1 Total Air Filter with Visipure™ filter technology provides you with industry-leading technology and functionality. The modern and unique design fits nicely into most home decors. The Holmes® aer1 Tower Air Purifier features a space saving design and the Visipure™ filter technology provides you with industry-leading technology and functionality. The modern and unique design fits nicely into most home decors. This Holmes® aer1 Tower Air Purifier offers 30 percent better dust elimination and you can see the particles being accumulated in the filter. It also comes with easy-to-use manual controls. With the filter reminder dial, you can easily see when a replacement is needed. The Holmes® aer1 Tower Air Purifier binds smoke, dust and pollen to form larger particles that are easier to eliminate to give you cleaner, crisper air. Tower Air Purifier With Visipure™