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common QUESTIONS |
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Below are some common questions we have received concerning Rotary Ventilators |
1. Do rotary ventilators work?
The answer is yes, especially when there is a breeze blowing. When there is no wind blowing they are still effective as a roof vent that allows hot air to escape. As hot air escapes the blades will turn even with no breeze.
2. How do rotary ventilators work?
In the first instance they allow hot air to escape from your roof – this is irrespective of prevailing wind. Once there is wind as well, then they help extract the air from your roof space. All of this is based on pressure differentials, either caused by temperature differences, or wind.
3. How much will rotary ventilators actually cool my building?
Given the variables inherent in building designs, it is impossible to provide precise guidance on what will happen to indoor room temperatures, however we do know that roof space temperatures can rise as high as 70°C, and vents can easily reduce this by 20-30°C, thereby reducing the heat loads on you ceiling insulation and any air conditioning ducts running through the roof space.
4. Can they be installed on both metal and tiled roofs?
The flashing supplied is suitable for use on both metal and tiled roofs, and the instructions make the different steps clear.
5. How many vents do I need?
Use our Ventilator Selector on the next page.
6. How much do the vents cost to run?
All our ventilators cost nothing to run.
7. How difficult is it to install a ventilator?
Most customers choose to have their ventilation system installed by a professional – cutting a hole in a roof can be intimidating to say the least. However, step by step instructions are provided for your reference.
8. Should ventilators be covered in the winter?
Ventilation systems are required year around. Most people associate ventilation with heat; however, of the two major destructive forces at work, moisture, not heat, is the most destructive. Since winter air is drier, it absorbs moisture from your building. This moisture produces mildew, rotting conditions damaging wood plaster or paint. Insulation also becomes wet and provides less resistance to heat loss.
9. Does Rain Come in Through Turbine Roof Vents?
When the turbine is spinning raindrops are deflected off of the spinning surface. Even when the turbine is not being turned by the wind it gives one more exit for the hot air.
10. Are the vents noisy?
Our ventilator range has a bearing system that is designed to be completely silent, each bearing is self-lubricating and requires no maintenance.
