How to Improve Louver Airflow Performance

Why Airflow Performance Matters

In modern building design, louver airflow performance is not just a technical parameter — it directly impacts energy efficiency, ventilation effectiveness, and operational costs. The right air performance louvers（加内链SL25V） allow sufficient air exchange while minimizing pressure drop, ensuring mechanical systems run efficiently. A poorly performing louver, on the other hand, forces fans to consume more power, leading to higher costs and reduced system reliability.

Understanding Louver Airflow Performance Requirements

The airflow performance of a louver is determined by three key factors:

1. Air Volume Flow Rate (m³/s) – defined by the M&E Engineer.

2. Desired Maximum Pressure Drop – specified by the M&E Engineer.

3. Louver Face Area (m²) – determined by the architect’s design.

From these, the Face Velocity (m/s) is calculated as:

Face Velocity = Volume Flow Rate (m³/s) ÷ Face Area (m²)

The pressure drop is then estimated using the formula:

Pressure Drop = –0.6125 × (Face Velocity ÷ DLC)²

This means that both airflow demand and physical louver size directly affect system performance.

Measuring Louver Airflow Performance

To assess performance, engineers typically evaluate:

· Discharge Loss Coefficient (DLC): Indicates how efficiently a louver passes airflow.

· Pressure Drop at a Given Flow Rate: Determines how much resistance the louver creates.

A weather louver performs differently at varying face velocities, so it is essential to ensure the louver selected meets site-specific airflow requirements.

Strategies to Improve Louver Efficiency

Improving air flow louvers design can reduce fan power consumption, minimize energy costs, and support green building goals. Key strategies include:

· Increase Louver Size – Larger louvers reduce face velocity and pressure drop.

· Select High-Performance Louvers – Choose performance louvers with optimized blade geometry for airflow efficiency.

· Optimize Placement – Ensure air intake louvers are correctly located to prevent blockages and improve airflow.

An efficient louver design not only saves money but can also contribute to an improved green building rating.

Smart Louver Selection = Energy Savings

When selecting louvers, consider both airflow performance and long-term operational costs. A louver with lower pressure drop reduces fan workload, translating into:

· Lower energy consumption.

· Reduced equipment strain and longer service life.

· Improved comfort and indoor air quality.

By working closely with M&E engineers and choosing advanced architectural louvers or industrial louvers, building owners achieve both system reliability and sustainable efficiency.

Louver airflow performance is shaped by engineering requirements and architectural design. The right combination of air volume, pressure drop, and face area ensures efficient ventilation while minimizing energy costs.

At Vanman, we provide air performance louvers and weather louvers engineered for superior airflow, low pressure drop, and long-term durability. Contact us today to explore louver solutions that deliver efficiency and sustainability.