20 Foot HVLS Ceiling Fan | 8 Blades | 19,750 Square Foot Coverage | 183620 CFM

Product Overview

The LLS-HVLS-FAN-20FT-8B is a 20-foot diameter high volume low speed ceiling fan with eight aluminum blades. The fan delivers 183,620 CFM at a maximum speed of 49 RPM, covering up to 19,750 square feet of floor space. A 1.5 HP gear drive motor powers the unit.

This fan ships with a NEMA 1 wall-mounted VFD controller that includes a safety disconnect, on/off toggle, and variable speed control. The complete assembly weighs 218 lbs. Available finishes are Brushed Aluminum, Black, Blue, and White.

Where This Product Fits Best

This 20-foot HVLS fan is built for large-footprint industrial and commercial spaces with open floor plans. Facilities including warehouses, manufacturing plants, aircraft hangars, gymnasiums, workshops, and factories are primary applications.

The fan requires a minimum mounting height of 15 feet from the floor, minimum ceiling clearance of 3 to 4 feet above the fan, and minimum horizontal clearance of 2 feet from walls or obstructions. Spaces that cannot meet these clearance requirements are not suitable for this unit.

Performance and Functional Considerations

At full speed, the fan moves 183,620 CFM while operating at 49 RPM. Sound output stays below 59 dBA, which allows the fan to run during occupied hours without creating excessive noise in work environments.

The wall-mounted VFD provides variable speed control, allowing operators to adjust airflow based on seasonal conditions or occupancy. The controller also functions as the primary disconnect point for the fan circuit.

Installation and Long-Term Use

Mounting hardware supports I-beam, Z-purlin, and open joist structures. Downrod extensions are available in 1-foot, 2-foot, 3-foot, and 6-foot lengths to accommodate varying ceiling heights while maintaining required clearances.

Electrical compatibility includes 208V-240V, 110V-120V, and 460V-480V options in single-phase and three-phase configurations. At 208-240V three-phase, the fan draws 1.90 amps. At 460-480V three-phase, draw is 0.95 amps. Operating frequency is 60 Hz.

Safety features integrated into the assembly include a safety cable, hub clips, hub retainer, dual-method fastening on all joined components, and an integrated sprinkler shut-off. The aluminum blade construction provides durability with manageable weight for the motor and mounting system.

How This Fixture Is Commonly Used

Operators use the wall-mounted VFD to adjust fan speed throughout the day based on temperature, humidity, or activity levels in the space. In warehouse and manufacturing environments, lower speeds are often used during cooler months to destratify warm air trapped at ceiling height. Higher speeds provide direct cooling effect during warmer periods.

The variable speed capability means the fan does not operate in fixed on/off modes. Facilities can dial in airflow that matches current conditions rather than running at maximum output continuously. The sub-59 dBA sound level at full speed allows the fan to run during shifts without interfering with communication or concentration in the workspace.

Safety, Certifications, and Warranty

The fan includes multiple integrated safety provisions: safety cable, hub clips, hub retainer, dual-method fastening on all joined components, and integrated sprinkler shut-off. The NEMA 1 rated controller enclosure provides protection for indoor installation.

We back this fan with a 5-year warranty.

Frequently Asked Questions

What voltage options are available?
This fan is available in 208V-240V, 110V-120V, and 460V-480V configurations. Both single-phase and three-phase options are offered.

How much floor area does this fan cover?
The 20-foot fan covers up to 19,750 square feet.

What is the minimum mounting height?
The fan requires a minimum mounting height of 15 feet from the floor, with 3 to 4 feet of clearance between the ceiling and the top of the fan.

What structure types can this fan mount to?
Mounting hardware supports I-beam, Z-purlin, and open joist structures.

What downrod lengths are available?
Downrod extensions are available in 1-foot, 2-foot, 3-foot, and 6-foot lengths.

What is the warranty coverage?
This fan includes a 5-year warranty.

Application Questions and Clarification

This product description reflects the provided specifications, ratings, and configuration options. For questions related to site-specific conditions, electrical compatibility, control integration, or application requirements not addressed in the provided data, our team is available to provide clarification.