Air Flow Regulators

Efficient airflow ventilation relies on precise air volume control tailored to room usage, occupancy, and system demands. Alnor’s CAV, VAV, and PAV air flow regulators ensure optimal air distribution, energy savings, and stable indoor conditions in commercial, industrial, and public buildings.

These regulators adapt airflow dynamically within forced air ventilation systems, responding to temperature, pressure, or occupancy signals—improving comfort while reducing operating costs.

What are CAV, VAV, and PAV Airflow Regulators?

• CAV (Constant Air Volume): Delivers a fixed airflow rate regardless of pressure changes. Used in rooms with stable occupancy, such as storage areas or technical zones.
• VAV (Variable Air Volume): Adjusts airflow based on control input—CO₂ levels, temperature, or user-defined setpoints. Ideal for offices, classrooms, and hotels.
• PAV (Pressure-Dependent Air Volume): Reacts to duct pressure variations without requiring external sensors. A simplified alternative to VAV for decentralized or retrofit systems.

Each regulator ensures consistent air flow control adapted to specific zone requirements, contributing to balanced pressure and better system efficiency.

Air Flow System Key Features and Benefits

• Accurate air volume regulation across a broad pressure range
• Integration with 0–10V or 24V controls (VAV); mechanical calibration for CAV and PAV
• Compact size for easy installation in round or rectangular ducts
• Corrosion-resistant construction (galvanized steel or aluminum)
• Optional acoustic insulation to reduce noise in supply ducts

Benefits:

• Reduced fan load and energy consumption
• Stable indoor temperature and air quality
• Adaptation to real-time ventilation demand
• Lower installation and maintenance costs in pressure-based systems (PAV)
• Support for green building and IAQ standards

Choosing the Right Flow Regulator for Your Needs

• Use CAV for constant-load zones (e.g., utility rooms, server rooms)
• Use VAV where airflow must follow occupancy or load variations (e.g., open-space offices, conference rooms)
• Use PAV in cost-sensitive or simplified systems (e.g., retrofits, smaller duct networks)

Correct selection ensures proper zone control, pressure balance, and efficient system operation. Alnor supports designers and installers with technical documentation and selection tools.

Applications of CAV, VAV, and PAV Airflow Regulators

• Office buildings – VAV ensures real-time airflow modulation
• Hospitals – PAV or VAV manage pressurized zones and isolation rooms
• Retail & hospitality – airflow adaptation in lobbies, guest rooms
• Laboratories – VAV maintains airflow accuracy under strict tolerances
• Industry & warehouses – CAV supports continuous ventilation
• Educational facilities – VAV or PAV adjust airflow by occupancy schedules

They integrate seamlessly with air flow ventilation systems, including heat recovery and zone-controlled installations.

Airflow Ventilation – Installation & Best Practices

• Install in straight duct sections for accurate readings
• Seal all joints to prevent air leakage
• Calibrate flow settings as per system design
• Check control signal integration (VAV) and test fail-safe function (if applicable)
• Schedule periodic inspections and recalibration based on usage intensity

Following these practices maximizes regulator lifespan and ensures compliance with HVAC performance standards.

Alnor Airflow Regulators – Technical Specifications & Compliance

• Flow range: from 20 to 2,000 m³/h depending on model
• Control: modulating (0–10V) or constant flow (mechanical setting)
• Pressure response: from 50 to 300 Pa (PAV)
• Materials: galvanized steel or aluminum; insulated versions available
• Shapes: circular (Ø100–315 mm) and rectangular (custom sizes)

Compliance:

• PN-EN 1751 (air leakage & performance)
• CE conformity & ISO 9001 manufacturing
• Compatible with low-energy and passive building ventilation requirements

Each regulator is tested in Alnor’s certified lab for pressure stability, noise level, and control accuracy.