HVLS Fan Sales, Installation, Repair & Maintenance.
C&D Industrial Maintenance services most HVLS (High-Volume Low-Speed) fan brands across Alabama, Arkansas, Florida, Georgia, North Carolina, South Carolina, and Tennessee. We sell, install, repair, and maintain direct-drive and gear-drive HVLS fans from 7 to 24 feet in diameter.
Our HVLS Fan Services
Sales & System Design
- Facility layout, ceiling height, square footage, and airflow assessment
- Fan diameter, quantity, and placement recommendations
- Sourcing from most major manufacturers
Repair
- Motor replacement (PMSM, induction, gear-drive)
- VFD and controller diagnostics
- Bearing replacement and blade balancing
- Gearbox rebuilds
- Safety cable inspection
- Electrical troubleshooting
- Service for current production models and discontinued/legacy equipment
Preventive Maintenance
- Motor amp draw and temperature checks
- Blade condition and balance inspection
- Mounting hardware torque verification
- Safety cable integrity testing
- Drive and controller function testing
- Electrical connection inspection
Routine maintenance extends fan life well beyond 15 years and prevents unplanned downtime.
Diagnostics
Our HVLS Fan Services
Sales & System Design
- Facility layout, ceiling height, square footage, and airflow assessment
- Fan diameter, quantity, and placement recommendations
- Sourcing from most major manufacturers
Repair
- Motor replacement (PMSM, induction, gear-drive)
- VFD and controller diagnostics
- Bearing replacement and blade balancing
- Gearbox rebuilds
- Safety cable inspection
- Electrical troubleshooting
- Service for current production models and discontinued/legacy equipment
Preventive Maintenance
- Motor amp draw and temperature checks
- Blade condition and balance inspection
- Mounting hardware torque verification
- Safety cable integrity testing
- Drive and controller function testing
- Electrical connection inspection
Routine maintenance extends fan life well beyond 15 years and prevents unplanned downtime.
Authorized Sales & Service
Schwank MonsterFans
Schwank is a global climate solutions manufacturer with North American production in Waynesboro, Georgia. C&D Industrial Maintenance provides full sales, installation, and service support for the entire MonsterFans product range.
Authorized Sales & Service
MonsterFans GD Series (Gear-Drive)
The GD Series is Schwank’s industrial workhorse. Powered by a helical inline reducer motor, these fans are built for warehouses, manufacturing plants, distribution centers, and hangars.
- Available in 8, 12, 16, 20, and 24-foot diameters
- Helical inline reducer motor, 53 to 105 RPM depending on diameter
- 1 to 2 HP motor (scales with diameter)
- 230V / 400V / 460V options
- Five 10¼-inch wide airfoil blades with modulating trailing edges
- Angle of attack up to 23°
- 713 cast aluminum alloy hub
- Noise levels between 62 to 64 dBA
- Maximum ceiling slope of 18.5 degrees
- UL, CSA, and CE certified
- Recommended inspection interval: every 20,000 hours
24-ft model
315,026 CFM, 2 HP, effective coverage up to 230 ft diameter
Warranty
Lifetime on blades, hub & mounting. 5 years on motor, gearbox & control panel.
Optional Accessories
Touch Control, Smart Control, Wind Sensor, mounting kits, VFD packages (NEMA 4X rated), and BMS integration via BACnet.
Direct-Drive
MonsterFans DD Series
The DD Series uses a gearless direct-drive permanent magnet motor, eliminating the gearbox entirely. No gear oil, no gearbox maintenance, quieter operation. Built for the same industrial environments as the GD but suited for facilities where noise and maintenance reduction are priorities.
- Available in 8 to 24 foot diameters
- Gearless direct-drive permanent magnet motor
- 53 to 105 RPM
- 264 CFM per watt
- Five anodized aluminum airfoil blades (6063 extruded), 10¼-inch width
- Angle of attack up to 23°
- 713 cast aluminum alloy hub
- Built-in 20,000 lumens LED dimmable light
- Versatile mounting: bar joists, I-beams, purlins, and wood frames
- UL and CSA certified
Warranty
Lifetime on blades and hub. 3 years on motor, gearbox, and control panel.
Optional Accessories
BMS integration, wind sensor, mounting kit extensions, Touch Control and Smart Control packages.
Direct-Drive
MonsterFans Style Series
The Style Series targets commercial and hospitality spaces, including restaurants, patios, lobbies, and retail. Designed for indoor and outdoor use with custom color finishes.
- Available in 7 and 10-foot diameters
- Gearless Transverse Flux Brushless DC motor
- 0 to 120 RPM max speed
- 7-ft model: 27,000 CFM, covers up to 1,850 sq ft
- Noise levels as low as 39 dBA
- Injection molded fiber-filled polypropylene blades
- AISI 383 aluminum alloy hub
- Keypad and LCD screen with onboard smart voltage controls
- Universal mounting system fits bar joists, beams, purlins, and wood frames
- UL and CSA certified
- Available in custom color finishes
Warranty
Lifetime on blades, hub, and mounting system. 3 years on motor and control panel.
Schwank MonsterFans:
Sales, Installation & Service
Schwank is a global climate solutions manufacturer with North American production based in Waynesboro, Georgia. Their MonsterFans HVLS line is built for industrial and commercial environments, and C&D Industrial Maintenance provides full sales, installation, and service support for the entire MonsterFans product range.
MonsterFans GD Series (Gear-Drive)
The GD Series is Schwank’s industrial workhorse. Powered by a helical inline reducer motor, these fans are built for warehouses, manufacturing plants, distribution centers, and hangars.
Warranty Coverage
Technical Specifications
Available Diameters
MonsterFans DD Series (Direct-Drive)
The DD Series uses a gearless direct-drive permanent magnet motor, eliminating the gearbox entirely. No gear oil, no gearbox maintenance, quieter operation. Built for the same industrial environments as the GD but suited for facilities where noise and maintenance reduction are priorities.
Warranty Coverage
Lifetime on blades, hub, and mounting system. 5 years on motor, gearbox, and control panel.
Technical Specifications
Available Diameters
MonsterFans Style Series (Direct-Drive)
The Style Series targets commercial and hospitality spaces, including restaurants, patios, lobbies, and retail. Designed for indoor and outdoor use with custom color finishes.
Warranty Coverage
Lifetime on blades, hub, and mounting system. 3 years on motor and control panel.
Technical Specifications
7 and 10-foot
Installation, Reapir & Maintenance
Other HVLS Fan Brands We Service
Hunter Industrial Fans
Installation, repair, and maintenance for Hunter HVLS models including the Titan, ECO, XP, and DDI series. 7 to 24-foot diameters. Direct-drive motors.
MacroAir Fans
Service for the full MacroAir lineup including the AVD370, AVD530, AVD5, AVDX, AirVolution-D, and 6ixBlade models. Motor, drive, and controller repairs.
Big Ass Fans
Service for Big Ass Fans models including the Powerfoil X4.0, Powerfoil D, Essence, and Haiku series. We also work on discontinued models like the Powerfoil 8 and Powerfoil Plus.
Rite-Hite, SkyBlade & All Other Brands
We service Rite-Hite Revolution fans, SkyBlade (TurboProp, Fantom, Ghost, D3, ShopProp, MinProp), and other HVLS fan manufacturers, current or discontinued.
All brand names mentioned are trademarks of their respective owners. C&D Industrial Maintenance is an independent service provider and is not affiliated with or endorsed by these manufacturers.
Diagnostics
Common HVLS Fan Problems We Fix
If your fan is exhibiting any of these symptoms, our technicians can diagnose and repair it.
- Fan won't start or runs intermittently
- Excessive vibration or wobble: blade imbalance, bent hub, or loose mounting
- Motor overheating or tripping the breaker
- Grinding or abnormal noise from motor or gearbox
- VFD fault codes or controller communication failure
- Reduced airflow: blade damage, incorrect pitch, or motor degradation
- Safety cable corrosion or failed retention hardware
- Electrical issues: wiring faults, contactor failure, voltage irregularities
- Gearbox oil leaks or gear tooth wear (gear-drive units)
Industries We Serve
- Warehouses & Distribution Centers
- Manufacturing Facilities
- Airports & Aviation Hangars
- Shopping Malls & Retail
- Automotive Service & Dealerships
- Food & Beverage Processing
- Cold Storage & Refrigerated Warehouses
- Gyms & Recreation Centers
- Agricultural & Livestock Facilities
- Convention Centers & Event Venues
- Breweries & Distilleries
- Data Center Common Areas
Industries We Serve
From warehouses and hangars to breweries and data centers, we service HVLS fans in every commercial and industrial environment.
Warehouses & Distribution Centers
Manufacturing Facilities
Airports & Aviation Hangars
Shopping Malls & Retail
Automotive Service & Dealerships
Food & Beverage Processing
Cold Storage & Refrigerated Warehouses
Gyms & Recreation Centers
Agricultural & Livestock Facilities
Convention Centers & Event Venues
Breweries & Distilleries
Data Center Common Areas
Industries We Serve
From warehouses and hangars to breweries and data centers — we service HVLS fans in every commercial and industrial environment.
Warehouses & Distribution Centers
Manufacturing Facilities
Airports & Aviation Hangars
Shopping Malls & Retail
Automotive Service & Dealerships
Food & Beverage Processing
Cold Storage & Refrigerated Warehouses
Gyms & Recreation Centers
Agricultural & Livestock Facilities
Convention Centers & Event Venues
Breweries & Distilleries
Data Center Common Areas
Also Available
We Also Install & Service Schwank Air Curtains
C&D installs and services Schwank’s full line of commercial and industrial air curtains, including the Epic Series for industrial doorways (10 to 16 ft mounting heights), Select10/12/14 for commercial entrances, and Breeze Series for restaurants and retail. If your facility needs climate separation at loading docks or entryways, give us a call.
Technical Reference
How HVLS Fans Work
HVLS fans are defined as ceiling fans exceeding 7 feet in diameter. They operate at low RPM (typically 40 to 200 RPM, roughly 8 mph at the blade tip) and move large volumes of air. A single 24-ft unit can circulate over 300,000 CFM and cover up to 22,000+ square feet.
The principle is simple: large-diameter blades push a column of air downward and outward across the floor. This creates a horizontal airflow pattern that reaches walls and returns along the ceiling, establishing continuous circulation without the turbulence and noise of high-speed fans.
Motor Types
Modern HVLS fans predominantly use permanent magnet synchronous motors (PMSM) in a direct-drive configuration. This eliminates the gearbox, reducing maintenance and failure points. Older units use induction motors with gear-drive systems, which require periodic oil changes and gearbox inspections.
Destratification
In the heating season, HVLS fans run in reverse at low speed to push warm air pooled at the ceiling back down to the occupied zone. This typically reduces the floor-to-ceiling temperature differential from 15 to 20°F down to 2 to 4°F, cutting heating costs significantly.
Sizing
Fan diameter selection depends on ceiling height, floor area, and airflow factor (based on activity level and heat load). A common formula: Room Volume (L x W x H in cubic feet) x Airflow Factor = required CFM, then matched to manufacturer spec sheets. Minimum recommended mounting height is generally 10 ft from floor to blade, with 2+ ft clearance above the fan to the structure.
