FAQs

Dual-powered systems have wind-driven vanes that rotate when there is sufficient wind blowing. The spinning wind vanes allow hot and/or stale air to escape through the throat of the vent more effectively when the wind vanes rotate. The integrated solar panel powers an internal fan when there is sufficient sunlight. If no wind is blowing then the fan blade, powered by the solar panel, in the throat of the vent drives hot and/or stale air out through the throat. If there is sunlight and wind, then the system operates at its most effective and the volume of hot and stale air extracted is significantly enhanced compared to only wind or only solar. Of course, the system operates when there is no wind and sun, or no sun and wind. So, it provides the best of both worlds as well as being significantly more effective when there is a breeze and sun. The dual operation of wind vanes and internal fan blade when operating in combination, increase the amount of airflow through the vent dramatically. This has been measured to be 30 times more effective under test conditions. The practical outcome is fewer hot spots and less moisture build-up.

A solar panel, an internal fan and motor, wind vanes or turbine housing, a weatherproof mounting throat, and flashings or seals for a waterproof installation are all common components of a dual-powered roof ventilator. While the wind turbine offers passive extraction and can help the fan during gusts, the solar panel uses sunlight to power the fan. The motor and bearings control the fan's noise profile and efficiency. Proper flashing and seals secure roof compatibility with tiled or metal roofs and prevent leaks. These components together enable the continuous extraction behaviour that defines hybrid roof vents.

By harvesting sunlight during clear periods and using wind-driven turbine action during breezy conditions, a dual-powered ventilator sustains extraction when one resource wanes. The system’s complementary action means that cloudy but windy days still see passive turbine extraction, while calm sunny days rely on the solar-driven fan; this redundancy produces predictable ventilation across typical weather patterns. Less time spent in the attic and a lower chance of condensation cycles that result in the growth of mould are the practical advantages for homeowners. Setting reasonable expectations for performance in various local climates is made easier by being aware of these circumstances.

In regions with high levels of sun exposure or sporadic wind, dual-powered vents are beneficial when attic heat or moisture is a recurring problem. In addition, the amount of hot air that is extracted is enhanced substantially. They tend to save energy by lowering the demand for air conditioning and lowering the risk of mould growth by extracting moisture steadily. Payback is dependent on climate, attic condition, and local energy costs; therefore, homeowners should think about doing a basic audit to determine the possible savings. In many properties, this combination will enhance the amount of air extracted and cool a home substantially.

iSwirl can be installed on most roof types. It is easily installed on metal or tiled roofs. It comes with roof flashing which ensures that there is no water penetration into the roof once installed. The roof flashing is made of zero tempered aluminium that is moulded to the shape of the roof. Installation is straightforward and detailed instructions are available.