Big Ass Fans High-Volume Low-Speed Fans
By Big Ass Fans
Last reviewed: December 2025
High-volume low-speed (HVLS) ceiling fans provide energy-efficient air circulation in dairy barns, creating gentle airflow that reduces heat stress.
Overview
High-volume low-speed (HVLS) fans are large-diameter ceiling fans that move massive amounts of air at low rotational speeds, providing effective and energy-efficient cooling for dairy facilities.
How HVLS Fans Work
Size and Speed
Coverage Area
Single large fan covers equivalent of multiple small fans.
Advantages for Dairy
Energy Efficiency
Even Air Distribution
Versatility
Applications
Freestall Barns
Mounted over stall areas for cow comfort.
Holding Areas
Reduce heat stress before milking.
Transition Areas
Maintain airflow in crossover alleys.
Installation Considerations
Ceiling Height
Adequate clearance required for blade diameter.
Structural Requirements
Must support fan weight and forces.
Electrical
Three-phase power typically required for larger units.
Controls
Variable Speed
Adjust speed based on conditions.
Automation
Integrate with building management systems.
Reversibility
Forward mode for cooling, reverse for destratification.
Maintenance
Routine
Advantages
Simple design means minimal maintenance needs.
Key Features
- Large Diameter Blades: 8-24 foot blade spans for maximum coverage
- Energy Efficiency: Uses up to 80% less energy than multiple high-speed fans
- Variable Speed Control: Adjustable airflow based on conditions
- Corrosion Resistance: Materials designed for dairy barn environments
- Quiet Operation: Low noise levels for cow comfort
Advanced Features
- Smart Controls: Temperature and humidity-based automatic operation
- Destratification: Evens temperature throughout barn space
- LED Integration: Some models include integrated lighting
Ideal For
Farm Types: Dairy farms, Freestall operations, Tiestall barns, Parlors
Competitive Advantages
What sets High-Volume Low-Speed Fans apart from alternatives:
- Dramatically lower operating costs than multiple high-speed fans
- Quieter operation improves cow comfort and behavior
- Single fan covers large areas
- Proven technology with long operational life
Pricing Information
Here is the pricing information for High-Volume Low-Speed Fans:
High-volume low-speed (HVLS) fans for dairy barn ventilation.
Pricing Model: Large industrial fans
Big Ass Fans and other HVLS manufacturers. Excellent for cow cooling in freestall barns.
Pros & Considerations
- Moves massive air volumes
- Energy efficient
- Quiet operation
- Proven in agriculture
- Quality construction
- Premium investment
- Building mounting needed
- Size considerations
- Best for large spaces
Implementation & Setup
How to implement High-Volume Low-Speed Fans on your dairy operation:
Implementation Timeline: 1-3 days per fan installation
Training & Support
Training and support options available for High-Volume Low-Speed Fans:
Support Channels:
Evaluation Questions
Key questions to consider when evaluating High-Volume Low-Speed Fans:
- What is your barn ceiling height and structure?
- How many square feet need coverage?
- What is your current cooling system?
- What are your energy costs for ventilation?