350mm Whirlybird Vent
In stock
R1 857,00 incl. VAT
The 350mm whirlybird vent is a high-capacity passive roof ventilation unit designed for larger roof spaces and higher heat loads. Manufactured from UV-stabilized polypropylene, this roof vent removes hot air and moisture naturally without electricity, making it suitable for residential, commercial, and light industrial applications.
Est. Delivery: 30 October – 2 November
The 350mm whirlybird vent provides increased airflow capacity compared to smaller roof vents, making it ideal for buildings with larger roof cavities or higher internal heat buildup. Using wind movement and natural convection, this whirlybird continuously extracts hot air while allowing fresh air to enter the roof space.
This unit operates silently using dual sealed bearings and requires no power supply or ongoing maintenance. Its polypropylene construction ensures resistance to corrosion, UV exposure, and harsh environmental conditions common in South African climates.
This 350mm 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
- Passive roof ventilation — no electricity required
- Higher airflow capacity than 240mm whirlybird vents
- Dual sealed, lubricated bearings for silent operation
- UV-stabilized polypropylene construction
- Corrosion-resistant and non-rusting
- Lightweight design for efficient wind startup
- Low maintenance with long service life
Material & Build Quality
This 350mm whirlybird vent is manufactured from virgin polypropylene with integrated UV and colour stabilizers. Unlike metal alternatives, polypropylene does not rust, dent easily, or degrade in coastal or chemically exposed environments. The material also has no scrap value, reducing theft risk.
Specifications
- Vent size: 350mm
- Material: UV-stabilised polypropylene
- Bearings: Dual sealed bearings
- Roof pitch adjustment: 0°–45°
- Operation: Wind- and convection-driven
- Power required: None
This product is not a chimney vent and is not designed for installation above fireplaces.
Typical Applications
The 350mm whirlybird vent is commonly used in:
- Larger residential roof spaces
- Warehouses and storage buildings
- Workshops and garages
- Commercial roof ventilation applications
- Agricultural buildings such as barns and sheds
Larger roof cavities may require multiple units depending on roof size and ventilation requirements.
Whirlybird Size Selection Guidance
Compared to smaller roof vents, the 350mm whirlybird vent is designed for situations where increased airflow is required. Buildings with higher ceilings, wider roof spans, or greater heat accumulation benefit from the larger throat size and improved extraction capacity.
Why Buy from Insulation Warehouse
- Specialist supplier of roof ventilation products
- Clear specifications and transparent pricing
- Stocked sizes for different ventilation needs
- Nationwide delivery available
- Supply-only — no installation services offered
Related Products
- 240mm 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.
