Whirlybird roof ventilators - Thinking of installing one ?
Why would you?
The Solar Whiz roof ventilation unit allows the solar ventilation alternative to provide an array of benefits to homes which require roof ventilation. Seeing as this whirlybird alternative is 10-30 times more powerful than your regular whirlybird, there’s no doubt the capacity the Solar Whiz yields will give your home the ventilation it needs,
Between the performance and capacity of the Solar Whiz roof ventilation unit, there’s no doubt that the value for money proposition makes the decision simple and easy. Why would you spend money on cheap whirlybirds with less air flow?
The everyday approach to incorporate a successful roof ventilation solution into your home is installing a whirlybird roof ventilator or roof vent. These are commonly referred to as roof vents, whirly gigs, air vents, roof ventilators, roof exhaust vent, roof fan, roof turbine ventilator, roof extractor fans, whirlygig or simply a ventilator. For a serious and successful solution which you will see reflected by the results the Solar Whiz produces, you’re best option would be to install a Solar Whiz unit.
The roof ventilation product (whirlybird) has been around for a long time, however, it’s limited ability to move air out of the roof space, has, over the last decade or two seen more people looking for more powerful alternatives for increased efficiency. More powerful whirlybird
Roof Ventilator Alternative
Benefit of Installing a Solar Whiz instead of a WhirlyBird
If you need roof ventilation to protect your roof space against moisture damage – running on solar helps ensure replacement air is relatively dry – where as a wind driven roof fan also will run in the rain, which could have the reverse effect and actually increase moisture levels in the roof.
Of course Solar Whiz offers an option to allow ventilation of the roof cavity to continue after sunset, however, most of the job is done during the day. During the day, Solar Whiz roof ventilators prevent heat from building up – whereas the whirlybird roof ventsstyle fan relies on the wind – or the build up of heat in the roof space to start operating. Few realize that the whirlybird roof ventilator relies on the expansion of the air in the roof space – triggered by high temperatures to start running.
Whirlybird Review for Performance of Major Roof Ventilators (Whirlygig)
Studies reviewing the performance of whirlybird roof vents been carried out showing that the average wind driven roof ventilator moves about 100 cbm/h – a small fraction of the air moved by even the smallest Solar Whiz unit (SW900).
Do Whirlybirds Work?
As you can see from above diagram – one whirlybird has a capacity of around 100 cbm/h without resistance (zero pressure differential). To achieve effective roof ventilation - you must replace the air in the roof space 3/5 times an hour. This requires well distributed access points for replacement air (e.g. eave vents) as well as a roof ventilator with sufficient capacity to compensate for the resistance the entry points and obstructions in the roof create for the replacement air, when the roof fan extracts the hot air. One or two whirly bird style roof ventilators will very rarely get you anywhere near the outside ambient temperature - as the capacity simply does not allow sufficient airflow through the roof. The roof ventilation capacity from the Whirlybird review clearly shows that a Whirlybird roof ventilator is not an effective approach to roof ventilation!
As the installation time and cost is similar for wind ventilators and Solar Whiz units – you will quickly find yourself ahead both performance and cost wise, when installing a Solar Whiz roof vent. Whirlybird price is no longer a major consideration – even though the price for one whirlybird is low – the total amount invested when installing whirly birds in order to achieve adequate roof ventilation is higher for a whirlybird based solution.
Click on one of these links to see videos of how to install a Solar Whiz roof vents:
Printable instructions can be seen using these links:
You can also download the Solar Whiz roof vent installation instructions by clicking here
If you are having work done on your roof or in your attic – make sure you replace your wihirly bird wind driven roof ventilator with a Solar Whiz to ensure optimum roof ventilation performance to increase your comfort and save on your cooling cost – at the same time!
Solar Whiz installation is as easy as Whirlybird installation to organise, if you are in any of these locations:
Solar Whirlybird Installation:
Brisbane, Gold Coast, Sunshine Coast, Central Coast, Sydney, South Coast, ACT, Melbourne, Adelaide, Perth.
We also cover many regional centers around Australia. Please refer to our dealer overview.
We have very detailed DIY instructions – or any roofing contractor, who does Whirlybird Installations will be able to install a Solar Whiz for you.