iSwirl 300 Residential Roof Ventilator

iSwirl 300 Residential Solar + Wind Roof Ventilator

More airflow when you need it — powered naturally by both wind and solar.

The iSwirl 300 is a patented hybrid roof ventilator that combines traditional wind-driven ventilation with a solar-powered internal fan.

Unlike a standard whirlybird that relies on wind alone, or a solar-only ventilator that relies on sunlight, the iSwirl uses both wind and solar to provide more consistent roof-space ventilation across changing conditions.

Key Features

• Uses both wind and solar power
• No mains electricity or ongoing running costs
• 24W solar panel powering an internal 24V brushless fan
• Up to 30× greater airflow than a standard wind-only whirlybird under tested conditions*
• Helps remove trapped heat, moisture and condensation from the roof cavity
• Suitable for metal and tiled roofs
• Adjustable flashing for different roof pitches
• Can retrofit many existing 300mm whirlybird installations
• Independently tested
• Tested to AS/NZS 4740
• Quiet operation — less than 50dB

*Based on independent testing comparing iSwirl with a standard whirlybird under the same controlled test conditions. Actual airflow varies according to environmental and installation conditions.

1. Proven Airflow Performance

Airflow from any roof ventilator varies according to factors including wind speed, temperature and pressure differentials, stack height, throat size and the particular installation.

For this reason, iSwirl has been independently tested by VIPAC Australia under controlled conditions.

iSwirl 300 Tested Airflow

Under like-for-like controlled testing against a standard whirlybird, the iSwirl delivered up to 30× greater airflow under the tested conditions.

The important difference is the hybrid design. When wind is low but the sun is shining, the solar-powered fan provides active extraction. When solar energy is unavailable, such as at night, the ventilator can continue to operate when wind is available.

There is no electrical connection required and no additional running cost.

2. How Many iSwirl 300s Do I Need?

The number of roof ventilators required depends on the size and volume of your roof cavity, roof pitch, available replacement air and other installation conditions.

As a general residential guide:

Not sure how many you need?

Contact us with your approximate roof area and whether you have a low or high-pitch roof and we can help you determine a suitable number.

3. Already Have a Whirlybird? Retrofit iSwirl

If you already have a standard whirlybird, you may not need to replace the existing flashing and throat.

The iSwirl 300 has a 300mm throat, compatible with many standard whirlybird installations with an approximately 300–306mm throat.

Simply remove the existing whirlybird head and attach the iSwirl to the existing throat in accordance with the installation instructions.

If you are retaining your existing throat, select the "Without Throat" option when ordering.

If your existing throat is not the correct size, an iSwirl throat and flashing can be purchased separately.

Not sure if yours will fit? Measure the diameter of your existing throat before ordering or contact us for assistance.

4. iSwirl 300 Compared

*Standard solar-only systems may vary.

5. Designed for Australian Conditions

The iSwirl 300 was developed in Australia as a high-quality hybrid ventilation solution designed to combine the advantages of wind and solar ventilation in a single unit.

It incorporates:

• 24W solar panel
• 24V brushless motor
• 470mm diameter tempered monocrystalline solar glass
• High-quality ball bearings
• Aluminium, PPL, zinc-aluminium and steel components
• 300mm throat
• Adjustable 500mm × 500mm flashing
• Quiet operation of less than 50dB

The iSwirl hybrid design is patented in Australia and internationally and has undergone independent testing by VIPAC Australia.

iSwirl was also selected as an ABA100® Winner for Eco Innovation in the Australian Brand Awards 2024.

6. Better Roof Ventilation — Without the Power Bill

The iSwirl 300 combines wind and solar ventilation to provide effective airflow across a wider range of conditions than a conventional wind-only whirlybird.

It can help:

• Remove trapped hot air from the roof cavity
• Reduce heat build-up
• Remove excess moisture and condensation
• Reduce conditions conducive to mould and mildew
• Keep roof insulation drier and performing effectively
• Reduce the ventilation load otherwise placed on powered cooling systems

And it does all of this without mains electricity or ongoing power costs.

Ready to Order?

Choose either:

Complete iSwirl 300 — including throat and flashing

or

iSwirl 300 Without Throat — for suitable retrofit installations.

If you're unsure about the number of units you need, whether your existing whirlybird can be retrofitted, or whether the product is suitable for your roof, contact us and we'll be happy to help.

Common Questions