How to create energy efficient extraction and ventilation in commercial kitchens

Energy efficiency is an increasingly critical aspect of commercial kitchen design and operation. The proper utilisation of extraction and ventilation solutions not only ensures a better working environment but with proper design and operation, also plays a significant role in reducing energy consumption. Martin Cummings is Technical Director at Airedale’s specialist business Airedale Ventilation Services. Here, Martin gives some valuable advice on how to achieve energy efficient extraction from your ventilation systems.

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Designing for Efficiency

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Optimal Canopy Placement: Carefully consider the layout and placement of canopies to ensure effective capture of cooking emissions. Position hoods directly over cooking equipment, minimizing the distance and ductwork required for extraction. Martin adds, “This enhances overall system efficiency and will reduce energy burden.”

Sizing the Hood Correctly: Ensure that the hood size matches the cooking equipment’s heat output and type. Martin says “Oversized hoods lead to unnecessary air volume extraction, resulting in wasted energy.” Properly sized hoods maintain the right airflow rate for capturing contaminants efficiently.

Utilising Stainless Steel Canopies: Stainless steel canopies are required for commercial kitchens due to their durability, easy maintenance, and safe operation. They efficiently capture and contain airborne contaminants, and are simpler to keep clean, ensuring optimal operation.

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Properly designed extraction and ventilation can make a positive impact on energy efficiency

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Efficient Ventilation System Selection

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Variable Speed Controls: Martin says “Install variable speed controls on exhaust fans to adjust airflow rates based on cooking loads and demands. This flexibility allows for energy savings during periods of low activity while maintaining adequate ventilation during peak hours.”

Demand-Controlled Ventilation (DCV): Implement DCV systems equipped with sensors that detect cooking activity levels. These systems automatically adjust ventilation rates to match the actual kitchen conditions, resulting in significant energy savings.

Consider High-Efficiency Exhaust Fans: Choose exhaust fans that meet or exceed industry energy efficiency standards. Energy Star certified fans and those with electronically commutated motors (ECMs) are known for their low energy consumption and reliable performance. “Efficient fans make all the difference to the effectiveness of the system, and the energy efficiency,” Martin adds.

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Optimise Airflow Management

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Use Air Balancing Techniques: Ensure proper air balancing by adjusting supply and exhaust airflow rates to ensure a negative pressure is achieved. 75-95% of the extract air should be replaced and airflow balanced to achieve this. Avoid excess flow rate to maximise efficient usage. This prevents the system from wasting energy by overcompensating.

Efficient Ductwork Design: Design the ventilation ductwork to minimise resistance and pressure losses. Use smooth ducts and avoid excessive bends or restrictions. Well-designed ductwork reduces fan energy consumption and optimises airflow.

Regular Filter Maintenance: Clean or replace filters regularly to prevent airflow restrictions. Martin elaborates, “Clogged filters decrease the system’s efficiency, leading to increased energy usage. Consider using high-efficiency filters that capture a higher percentage of contaminants without hindering airflow.”

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Conclusion

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Energy efficiency from your commercial kitchen extraction and ventilation solutions should be a vital part of creating sustainable and cost-effective operations. By following the advice in areas such as optimal design, system selection, and airflow management you can significantly reduce energy consumption while maintaining a comfortable and safe environment for your kitchen staff. Implement these strategies and contribute to a greener future while enjoying the long-term benefits of energy savings in your commercial kitchen.

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If you would benefit from talking to Martin or one of our specialists about energy efficiency or any aspects of ventilation, please get in touch.