CAT CLASS: HQ-10468

Up to 24 in High-Velocity Drum Fan

Up to 24 in high-velocity drum fans are the smallest class in the barrel fan family, designed to cool one worker or a small work area. These units typically range from 18 to 20 inches in diameter and sit at the bottom of the high-velocity drum fan ladder, below the 24-42 in and 42+ in classes. Their compact footprint makes them suited for confined spaces and applications where portability outweighs the need for large-area airflow.

Models

Brands

Cat classes

Pick a size class — capacity and reach differ across the range.

Key specifications

Specification	Typical range	What it means
Drum diameter	18–20 in (45.7–50.8 cm)	Defines the swept area and determines airflow coverage radius
Airflow delivery	3,000–5,000 CFM	Measured at maximum speed; sufficient for personal cooling or small zone ventilation
Weight	30–50 lb (13.6–22.7 kg)	Light enough for one-person carry and frequent repositioning
Power draw	120 V, 2–4 A	Standard outlet compatible; minimal circuit load

How to choose

This size class is appropriate when the cooling requirement is limited to a single worker or a small, defined work area such as a storage closet, small utility room, or individual task station. The 18 to 20 in barrel fan offers portability and minimal power demand, making it practical where repositioning is frequent or where circuit capacity is limited. When airflow must reach multiple workers, cover a room larger than approximately 200 square feet, or provide ventilation for enclosed work like welding booths or paint prep, the 24-42 in High-Velocity Drum Fan is the better choice. Facilities needing whole-bay air circulation or large-area drying should consider the 42+ in High-Velocity Drum Fan.

What this size handles

Spot cooling for a single painter working on cabinetry in a shop
Personal ventilation for a mechanic under a vehicle lift
Air circulation in a small storage room during inventory turnover
Drying a residential bathroom floor after water cleanup
Ventilation for a worker in a narrow utility corridor
Cooling a single workstation in a metal fabrication area

Safety & operation

Barrel-style guard prevents finger contact with blades during operation; confirm guard is intact before use
Stable base design resists tipping on level surfaces; place unit on solid flooring to prevent walk-behind vibration movement
Electrical components should remain dry; position fan to prevent water ingress in wet cleanup or outdoor applications
Ensure power cord routing avoids foot traffic to prevent trip hazards and accidental disconnection

Transport & logistics

One-person carry by integrated handle or barrel frame; no mechanical assistance required
Fits in the bed of a pickup truck, cargo van, or car trunk without tie-downs
Stackable with protective spacing to prevent blade contact during multi-unit transport

Power & supply

Standard 120 V household or job-site outlet; no dedicated circuit typically required
Extension cords rated for 10–15 A at job-site distances accommodate the unit without voltage drop concerns
Compatible with portable generators rated 1,000 W or higher

Frequently asked

What is the effective cooling radius for an 18 to 20 in drum fan?

Effective personal cooling typically extends 8 to 12 feet directly in front of the fan, depending on speed setting and ambient conditions. Air movement diminishes significantly beyond this range.

Can this size class provide adequate ventilation for a two-person crew?

If both workers remain within a 10-foot radius and airflow direction can serve both positions, an up to 24 in fan may suffice. Separate work zones or distances beyond 12 feet generally require a larger unit or multiple fans.

How does weight compare across the drum fan ladder?

Up to 24 in models weigh 30 to 50 lb and are one-person portable. The 24-42 in class typically ranges from 60 to 100 lb, often requiring two-person handling or a cart, while 42+ in units exceed 100 lb and generally need mechanical assistance.