Better low wind performance
Up to 34 times greater extraction than the Standard SV450 in very low wind conditions, as reported in independent testing. See performance details.
iSwirl 450Hybrid solar + wind
industrial roof ventilator
Two independent ventilation systems. One practical solution for improved industrial airflow, especially when the wind drops. Designed and manufactured in Australia, with no mains electricity required.
Solar + windIndependent extraction systems
450 mm throatIndustrial roof ventilation
No mains powerNo electricity running costs
Independently testedIn accordance with AS 4740
Ventilation that makes more of the sun and wind
Ampelite has partnered with Australian innovator iSwirl Pty Ltd to combine proven wind-driven rotary ventilation with independent solar-powered mechanical extraction.
The iSwirl 450 helps improve airflow during periods of low natural wind, when conventional rotary ventilators are least effective. Its hybrid design supports ventilation whenever either energy source is available.
Solar-powered extraction
Independent mechanical extraction harnesses solar energy to improve performance, particularly during low wind conditions.
Wind-driven ventilation
The rotary ventilator continues to harness wind energy whenever it is available. The two systems operate independently.
Built for the demands of industrial buildings
A true hybrid system
Independent solar and wind extraction broaden the range of conditions in which ventilation is available.
No electricity running costs
Self-powered operation requires no mains electricity connection and consumes no grid electricity during use.
Fewer roof penetrations
The brochure's illustrative comparison achieves comparable extraction with approximately 50% fewer ventilators under its nominated conditions.
Simpler installation
No electrical connection or electrician is required. Fewer units can also help reduce installation time and maintenance requirements.
Made for Australian conditions
Australian designed and manufactured, combining Ampelite's industrial roofing experience with iSwirl's patented hybrid technology.
Independent performance testing
34×
Up to 34 times greater extraction
in very low wind conditions compared with the Standard SV450.
99%
Up to 99% higher airflow
at a 3 m stack height under the brochure's nominal operating conditions, approximately twice the airflow.
The brochure reports NATA-certified independent testing in accordance with AS 4740 - Natural Ventilators - Classification and Performance. Results depend on the operating conditions; these figures are not a guaranteed extraction rate for every building.
| Stack height | Standard SV450 | iSwirl 450 (full sun) |
|---|---|---|
| 3 m | 396 m³/hr | 788 m³/hr |
| 6 m | 529 m³/hr | 853 m³/hr |
| 9 m | 637 m³/hr | 907 m³/hr |
Values reproduced from page 3 of the September 2026 brochure. iSwirl 450 results are for full solar operation.
| Measure | Standard SV450 | iSwirl 450 (full sun) |
|---|---|---|
| Flow coefficient (Cf) | 0.159 | 0.743 |
Tested under identical laboratory conditions. Source: brochure, page 2.
Comparable ventilation.
Fewer roof penetrations.
Illustrative 1,500 m² industrial facility
3 m effective stack height · 6°C temperature differential · 12 km/h wind speed · iSwirl 450 in full sun
Standard SV450
18ventilators
- Extraction per ventilator
- 396 m³/hr
- Indicative total extraction
- 7,128 m³/hr
iSwirl 450
9ventilators
- Extraction per ventilator
- 788 m³/hr
- Indicative total extraction
- 7,092 m³/hr
Approximately 50% fewer ventilators in this example. This comparison is illustrative and applies to the nominated conditions above. It is not a project-specific ventilation design. Final quantities and layouts must be determined for the building, application and ventilation objectives.
Dimensions and specifications
| Head diameter | 650 mm |
|---|---|
| Throat diameter | 450 mm |
| Head height | 405 mm |
| Throat height | 280 mm |
| Flashing | 740 × 640 mm |
| Roof pitch | 1°-30° maximum |
| Net weight | 14.5 kg |
| Packaged weight | 18.5 kg |
Ventilation for large working spaces
A practical solution where improved airflow and reduced heat build-up are important.
- Warehouses
- Factories
- Manufacturing facilities
- Distribution centres
- Agricultural buildings
- Industrial buildings
Speak with Ampelite about the ventilation objectives and installation requirements for your building.
Product brochure
iSwirl 450 industrial ventilator
PDF · 4 pages · September 2026
Before you specify
iSwirl 450
Answers to common product and planning questions, based on the current brochure.
Does iSwirl 450 need mains electricity?
No. It combines solar-powered mechanical extraction with wind-driven ventilation. There is no mains electricity connection, no grid electricity consumption during operation and no electrician required for an electrical connection.
Does it still ventilate when the sun is not available?
The wind-driven system works independently of the solar-powered extraction system and can provide ventilation whenever wind energy is available. Performance depends on the available solar and wind conditions.
What does the “up to 34×” figure mean?
It is the brochure's independently tested comparison with the Standard SV450 in very low wind conditions. It does not describe airflow in all conditions. The full-sun airflow values at 3 m, 6 m and 9 m effective stack heights are listed in the performance section.
Which roof pitches are listed?
The brochure lists a roof pitch range of 1° to a maximum of 30°. Contact your local Ampelite office to confirm suitability and installation requirements for your roof.
Plan your industrial roof ventilation
Talk to your local Ampelite team about iSwirl 450, product selection and the requirements of your building.