The F120 Series ducted commercial air cleaner is mounted recessed in the ceiling for quiet, “behind-the-scenes” air cleaning, the company says. The unit can be used in sound-sensitive settings, such as conference rooms, classrooms, and libraries. Where décor is a concern, the only visible sign of the unit is the off-white ceiling grille. The air cleaner collects airborne particles by circulating room air through a media filter. With the optional CPZ™ module, the system also captures gases, odors, and VOCs. Honeywell International Inc., Home and Building Control, 1985 Douglas Drive N., Golden Valley, MN 55422-3992; 800-345-6770, ext. 423; (e-mail); (website).