INDUSTRY EXCLUSIVE BUILT-IN waterproof molded mounting tabs allow for FAST and TOOL-FREE INSTALLATION of optional MAXXAIR FANMATE (FANMATE Models 755, 855 and 955 sold separately) . • POWERFUL 4 SPEED fan motor with 12” fan blade moves over 900 CFM of air to keep you cool and comfortable ► Manual lift lid with twin lifting arms and lid locking mechanism • 2.85 inch profile when lid is closed • Flush Mounted, easy to clean keypad - controls the fan speed ► EASILY INSTALLS into any 14" x 14" opening