Metal Back Draft Shutter – Galvanised Steel Non-Return Ventilation Damper

Prevent unwanted reverse airflow and improve ventilation efficiency with the Metal Back Draft Shutter, a durable, spring-loaded ventilation accessory designed for extractor fans, grow rooms, hydroponic systems and general air extraction installations.

Manufactured from robust galvanised steel, this high-quality back draught damper helps prevent cold air, unwanted odours and external draughts from travelling backwards through ventilation ducting when the extraction fan is switched off.

The automatic spring-loaded butterfly mechanism opens when air is being extracted and closes when airflow stops, helping maintain a more controlled indoor environment without requiring electricity or manual operation.

Ideal for professional hydroponic growers, greenhouse ventilation, indoor cultivation and domestic extraction systems, this metal non-return shutter provides a simple and effective solution for managing airflow.

Key Features & Benefits

• Automatic Backdraft Prevention – Helps stop reverse airflow through ventilation ducting when extractor fans are switched off.

• Spring-Loaded Butterfly Mechanism – Automatically opens during extraction and closes when airflow stops.

• Durable Galvanised Steel Construction – Strong, corrosion-resistant metal housing designed for reliable performance.

• Improved Temperature Control – Helps reduce unwanted cold draughts and heat loss through ventilation outlets.

• Reduces Odour Backflow – Helps limit unwanted air and odours returning through extraction ducting.

• Pest Protection – Helps discourage insects and other small pests from entering through ventilation systems.

• No Electrical Connection Required – Operates automatically using airflow and spring tension.

• Easy Installation – Designed to fit compatible round ventilation ducting.

• Multiple Sizes Available – Suitable for a variety of extractor fan and ducting diameters.

Ideal Applications

• Hydroponic grow rooms and grow tents

• Inline extractor fan systems

• Greenhouse ventilation

• Carbon filter extraction systems

• Domestic and commercial ventilation

• Air intake and extraction ducting

Why Choose a Metal Back Draft Shutter?

Maintaining efficient airflow is essential for effective ventilation and environmental control. Without a backdraft shutter, unwanted air can travel backwards through an inactive extraction system, potentially causing temperature fluctuations, draughts and reduced ventilation efficiency.

The Metal Back Draft Shutter provides an automatic, low-maintenance solution that helps protect your growing environment and maintain controlled airflow.

A practical and reliable addition to any grow room extraction or ventilation system, offering durable construction, automatic operation and effective backdraught protection.

Please note: Backdraft shutters reduce reverse airflow but do not provide a completely airtight seal. Ensure the correct diameter is selected and that your extractor fan can overcome the shutter's spring resistance.