NOTE: 2 FT. MINIMUM CLEARANCE FROM CEILING REQUIRED FOR INSTALLATION. LARGE AREA COVERAGE: The expansive, 8 foot diameter of Big Ass Fans Essence moves some serious air, enough for large, commercial spaces of up to 40 feet x 40 feet; Standard universal mount compatible with most common ceiling structures 11 feet to 25 feet high (additional adaptor kit may be required)STYLISH AND SILENT: Designed for power, versatility, and sophistication, Essence transforms stuffy conditions and offers any setting a centerpiece of style; 8 patented, anodized-aluminum airfoils maximize performance without drag; Maintenance free, gearless drive motor delivers whisper-quiet airflow (<35dBA) that keeps employees motivated, customers engaged, and guests in awe of your spaceWIRED WALL CONTROL: Easily control the power and speed of your Essence fan with the included rotary-style dial of the wall controller; A wired wall controller comes standard; Mounts in standard single-gang junction box or to wall surface; Can be integrated with your safety and automation systemsBIG ENERGY SAVINGS: Essence works with your HVAC to save energy costs; In summer, the fan's cooling effect feels up to 10F degrees cooler so the A/C can be set higher; In winter, heat is pushed down from the ceiling, decreasing the work of your heater and leading to savings as high as 30 percentDURABLE AND VERSATILE: Essence's maintenance-free motor is wet rated to UL standards (IP43 rated) to provide comfort both indoors and out; Includes mount hardware for bar joists spanned by angle iron (angle irons not included)