Consider These 5 Things Before Installing a Turbine Ventilator

The space beneath a roof often becomes a collection point for hot air, especially during sunny weather or when the roof is exposed to direct sunlight for most of the day.

This condition is commonly found in residential homes, warehouses, workshops, and commercial buildings. Many building owners only become aware of the issue when certain rooms feel noticeably hotter or more stuffy than other areas.

One of the most widely used solutions for removing hot air from roof spaces is a turbine ventilator. Although installation may appear straightforward, there are several factors that should be considered first to ensure the ventilator performs according to the building's requirements.

Understand the Condition of the Roof First

Before selecting a turbine ventilator, the roof condition should be evaluated. The type of roofing material, roof design, and roof pitch can all influence both the installation process and the placement of the ventilator units.

A simple roof design typically has different ventilation requirements compared to roofs with multiple intersections or more complex configurations. These factors also affect airflow movement beneath the roof.

The roof condition is usually one of the primary considerations when determining the appropriate size and number of turbine ventilators required.

Understand the Purpose of the Installation

Not all buildings install turbine ventilators for the same reason.

In residential properties, roof ventilators are often used to help reduce heat buildup above the ceiling. In warehouses and industrial buildings, installation is usually intended to improve overall air circulation within the structure.

These ventilation requirements typically determine the size and type of ventilator that should be selected.

Choose the Right Installation Location

The installation location has a significant impact on the performance of a turbine ventilator.

If installed too close to obstructions or in an unsuitable position, airflow may not function efficiently. Conversely, proper placement helps remove accumulated hot air beneath the roof more effectively.

In some buildings, installation at the roof ridge is sufficient. However, certain roof designs may require placement at specific locations to ensure more effective airflow movement.

Determine the Required Number of Turbine Ventilators

One of the most common questions before installation is how many turbine ventilators are required.

There is no universal number that applies to every building. Residential homes, warehouses, workshops, and production facilities all have different room sizes and ventilation requirements.

The required number of ventilators is generally determined by the building volume and the required Air Changes per Hour (ACH). This calculation helps estimate the ventilation capacity needed based on the building's intended use.

As a reference, the following ACH ranges are commonly used for various building types.

Note: The ACH required for each building depends on its location, design, and operating conditions.

Once the ACH value has been determined, the ventilation requirement can be calculated based on the building volume and the exhaust capacity of the selected unit.

The following example uses an Ozvent turbine ventilator for a warehouse measuring 75 meters × 35 meters × 9 meters.

Calculation Formula:

Ventilator Requirement = (Building Volume × ACH) ÷ Ventilator Capacity

Step 1: Calculate Building Volume

Use the formula:

Building Volume = Length × Width × Height

Example:

Length (L) = 75 m

Width (W) = 35 m

Height (H) = 9 m

Therefore:

Volume = 75 × 35 × 9 = 23,625 m³

Step 2: Determine the ACH Value

ACH (Air Changes per Hour) refers to the number of air changes required within one hour.

For example, a warehouse requires an ACH value of 5.

Step 3: Determine the Turbine Ventilator Capacity

Example Ozvent capacities:

Step 4: Calculate the Required Number of Units

Formula:

Number of Ventilators = (Building Volume × ACH) ÷ Ventilator Capacity

Using Ozvent BS 360 (14")

(23,625 × 5) ÷ 1,584

= 74.57 units

≈ 75 BS 360 (14") units

Using Ozvent BS 600 (24")

(23,625 × 5) ÷ 4,536

= 26.04 units

≈ 27 BS 600 (24") units

Conclusion

Based on the calculation above, a building measuring 75 m × 35 m × 9 m with an ACH requirement of 5 requires approximately:

75 Ozvent BS 360 (14") units, or

27 Ozvent BS 600 (24") units

Based on the example above, a warehouse measuring 75 meters × 35 meters × 9 meters with a required air exchange rate of five times per hour would need approximately 75 Ozvent BS 360 (14") units or 27 Ozvent BS 600 (24") units.

The calculation demonstrates that turbine ventilator requirements are not determined solely by floor area. Building volume, exhaust capacity, and target air exchange rates must also be considered to ensure the installed units meet the building's ventilation requirements.

FAQ

Do turbine ventilators require electricity to operate?

Generally, no. Turbine ventilators operate using natural airflow and pressure differences, allowing them to rotate without requiring additional electrical power.

Can turbine ventilators be installed on existing homes?

Yes. Turbine ventilators are not limited to new buildings. Many existing homes install roof ventilators to help improve airflow and reduce heat buildup beneath the roof.

Can installing a turbine ventilator cause roof leaks?

No, provided the installation is carried out correctly. Roof leaks are generally caused by improper installation details rather than the turbine ventilator itself. Ozvent turbine ventilators are specifically designed for roof applications and have been used in a wide range of residential, warehouse, and commercial projects with installation systems that prioritize protection against rainwater intrusion.

Choosing a turbine ventilator is not simply a matter of selecting a product size. The ventilator should be matched to the building conditions and ventilation requirements. Factors such as the number of units, installation location, and ventilator type can all influence the final performance after installation.

If you are still comparing sizes or need assistance calculating turbine ventilator requirements for a home, warehouse, workshop, or commercial building, the Batara Group team is ready to provide recommendations for the most suitable Ozvent products based on your building conditions and project requirements.

Produced by the Batara Group Editorial & Content Team