Rotating Ventilation cowls

Rotary Cowls for Ventilation

A rotary cowl for ventilation (turbo deflector) is an energy-independent device that significantly enhances the draft in natural ventilation systems. By using even a light breeze, it creates a constant vacuum that effectively extracts used, moist air, odors, and dust from rooms, ensuring a healthy microclimate.

Unlike chimney models, ventilation cowls are designed to work with room-temperature air. Therefore, their key parameter is not heat resistance, but aerodynamic efficiency and low resistance to airflow.

Why a Rotary Cowl, and Not a Standard Static Vent?

Besides rotary cowls, there are simpler static vents that operate solely based on their geometry. However, for effective ventilation, rotary models (turbo deflectors) have a key advantage.

• Static Vent: Passively protects from precipitation and only slightly enhances draft during strong, stable wind. In light wind, its benefit is minimal.
• Rotary Cowl: Actively draws out air, using even the slightest breeze. It creates a constant vacuum in the duct, guaranteeing stable air exchange in any weather, not just during a storm.

That is why, for solving problems with humidity, mold, and stale air, a turbo deflector is an incomparably more effective solution.

Operating Principle and Key Advantages

The deflector's turbine rotates with the wind, creating centrifugal forces that actively draw air out of the ventilation duct. This simple solution allows you to solve a whole range of domestic and commercial problems without electricity costs.

• Fighting Humidity and Mold: The constant exhaust effectively removes moist air from bathrooms, kitchens, basements, and attics, preventing condensation and fungal growth.
• Eliminating Odors and Stale Air: It ensures continuous air exchange, removing unpleasant smells and creating a feeling of freshness.
• Cooling Attic Space: In the summer, the turbo deflector extracts hot air from the attic, lowering the temperature in the house and reducing the load on air conditioners.
• Saving Electricity: It operates for free using wind energy and is an excellent alternative or supplement to electric exhaust fans.

How to Choose the Right Model: 3 Simple Steps

Our product range includes various designs of turbo deflectors. To choose the ideal option, answer three simple questions:

Step 1: Which shape suits you — spherical or cylindrical?

Both types perform their function effectively. The choice between them is primarily a matter of aesthetics and personal preference. Spherical models are the classic and most popular solution, while cylindrical ones have a more minimalist and modern look.

Step 2: Where will you be installing the deflector?

The required base type depends on the installation location:

• On a round pipe: Choose a model "without a base". It is placed directly on the end of your ventilation pipe.
• On a flat surface or square duct: You need a model "with a base". Its square plate ensures a convenient and sealed installation.
• For ventilation through an unused chimney: We have special models "for ceramic chimney flues". They are equipped with a special adapter for mounting on standard ceramic blocks. Important: these deflectors are for ventilation only, not for active chimneys.

Step 3: Which material do you need?

The choice of material depends on the environment in which the deflector will operate. This table will help you make the right choice:

What to Look For When Buying

To ensure your ventilation deflector works effectively and for a long time, pay attention to the following aspects when choosing:

• Low Flow Resistance: A quality deflector should not "choke" the ventilation. Check if the model has been tested for performance (compliance with EN 13141-1 is a plus).
• Bearing Assembly Design: Preference should be given to models with sealed bearings that are protected from dust and moisture and do not require lubrication.
• Balancing Quality: A well-balanced turbine rotates silently and starts spinning in even very light winds.
• Material choice: Choose the material depending on the conditions: galvanized steel for standard tasks, stainless steel for harsh conditions.

Installation Principles

The proper installation of a rotary cowl is key to its long and effective operation. The key principles are similar to the installation of chimney models:

• Strictly Vertical Axis: For proper bearing operation and to prevent vibrations.
• Secure Fastening: The device must be firmly attached to the ventilation duct.
• Free Space for Rotation: Ensure that the turbine's rotation is not obstructed.

Why is the Quality of a Ventilation Cowl Important?

Saving money on a ventilation cowl can lead to disappointment and new problems. A cheap product often leads to:

• Reduced Efficiency: Instead of enhancing the draft, a low-quality deflector can create additional resistance and worsen air exchange.
• Noise and Vibrations: Poor or open bearings wear out quickly, and begin to squeak and hum, creating discomfort.
• Seizing and Leaks: After a few seasons, the turbine can seize up, turning it into a useless cap, while a low-quality base can cause roof leaks.

A high-quality, balanced turbo deflector is a long-term investment in the comfort and healthy microclimate of your home.

Need Help with Your Selection?

Our engineers can help you select the right turbo deflector and all the necessary components to solve your ventilation challenge. Contact us for a consultation.