240mm Whirlybird Vent
In stock
R1 499,00 incl. VAT
The 240mm whirlybird vent is a passive roof ventilation solution designed to extract hot air and moisture from roof spaces, bathrooms, kitchens, offices, and small commercial buildings. Powered by wind and natural convection, this roof vent operates continuously without electricity, helping reduce heat buildup, condensation, and stale air in enclosed spaces.
Est. Delivery: 14 September – 15 September
The 240mm whirlybird vent (also commonly referred to as a roof whirlybird or wind turbine ventilator) is engineered to provide effective, continuous roof ventilation using natural airflow. As warm air rises, the rotating turbine extracts trapped heat and moisture from the roof cavity and replaces it with cooler external air.
This model is ideal for residential roofs, light commercial buildings, containers, sheds, workshops, clinics, staff rooms, and roof spaces where controlled ventilation is required without ongoing energy costs.
Unlike traditional metal whirlybirds, this unit is manufactured from virgin polypropylene with built-in UV and colour stabilizers, ensuring long-term durability without rust, corrosion, or paint degradation.
This 240mm whirlybird vent is part of our full range of passive roof ventilation products. View our full range of whirlybirds to compare sizes and materials.
Key Features & Benefits
- Passive roof ventilation – no electricity required
- Continuous airflow driven by wind and heat convection
- Helps reduce roof heat buildup and condensation
- Lightweight yet rigid construction for fast start-up rotation
- Quiet operation with sealed, lubricated bearings
- Resistant to rust, corrosion, chemicals, and coastal conditions
- Low theft risk due to non-metal construction
- Maintenance-free design
- Suitable for residential and light commercial applications
Material & Construction
- Manufactured from high-quality virgin polypropylene
- UV-stabilized for long-term outdoor exposure
- Colour integrated into the material (won’t peel or flake)
- Flexible structure helps resist hail damage
- Chemically resistant to acids and ammonia
Available colours may include:
Silver, Green, Terracotta, Grey, Charcoal, Black, Beige, and Ivory White.
Technical Specifications
- Throat size: 240mm
- Vane diameter: ±325mm
- Air extraction: ±1000 m³/hour @ 15 km/h wind speed
- Roof pitch compatibility: Adjustable from 0° to 45°
- Bearings: Dual sealed, silent bearings
- Power source: Wind & natural convection
Recommended Coverage Guide
-
Ideal airflow:
1 unit per ±80 m³ of building volume -
Minimum airflow:
1 unit per ±160 m³ of building volume
Actual performance may vary depending on roof height, wind exposure, and building layout.
Typical Applications
- Residential roof spaces
- Bathrooms and kitchens
- Home offices
- Wendy houses and containers
- Sheds, workshops, and garages
- Small commercial and agricultural buildings
Product Lifespan & Warranty
The 240mm whirlybird vent is designed for long-term outdoor use with an expected lifespan of 10+ years under normal conditions. A manufacturer warranty applies (subject to supplier terms).
Why Buy from Insulation Warehouse
- Stocked roof ventilation products
- Nationwide delivery options
- Bulk order pricing available
- Trade and contractor support
- Compatible with a wide range of roof types
Related Products
- 350mm Whirlybird Vent
- 500mm Whirlybird Vent
- Roof Ventilation Systems
- Passive Roof Vent Solutions
Delivery Information
At Insulation Warehouse, we provide fast, reliable delivery across our service network so you get the insulation you need without delays. We are an online insulation store and do not operate as a walk-in retail outlet. All orders are placed online, processed immediately, and delivered directly to your home, site, or business.
Delivery Timeframes
- Most standard orders are delivered within 1–3 business days
- Fast dispatch from our storage facilities
- Orders are shipped as soon as payment is received
Specialized Product Lead Times
A few specialized or less common items may require additional preparation before dispatch. These can include:
- Industrial densities
- Custom-sized or made-to-order insulation
- Foil-faced products
- Commercial or non-standard rolls
When these items require extra time, we’ll let you know the expected delivery window.
Delivery Network
We deliver insulation products throughout:
- Johannesburg
- Centurion
- Pretoria
These areas form our primary delivery network, ensuring quick turnaround times for homeowners, installers, and contractors.
We can also deliver to surrounding suburbs — just send us your address if you’re unsure.
Delivery Process
- Orders leave our storage facility once paid for in full
- Delivery updates and timelines are provided
- Large orders may arrive on pallets to ensure product protection
Fast, Reliable Service
Our goal is to provide the quickest, most convenient delivery service possible. Whether you’re insulating a home, office, or development, our streamlined logistics ensure your materials arrive safely and on time.
