Ventilator FAQ’s

Are the terms Whirlybird, Spinaway, vent, ventilator and Whirlygig interchangeable?

Yes they are.  All the above mentioned terms mean and refer to the same thing. We stock the CSR Edmonds Windmaster and Supavent ventilators. We also carry vehicle ventsTurbo Ventura vents for smaller areas and specialty sewer vents


What’s the difference between a Windmaster and a Supavent?

The Windmaster is a 300mm diameter neck, aluminium construction wind driven ventilator with nylon encased bearings. The Supavent is a UV stabilised polymer construction with a 250mm diameter neck with stainless steel bearings


How many units would the average house need?

Most houses generally require 2 ventilators depending on the shape of the property and the ceiling pitch, roof materials and available air intakes. Very rarely would 3 units be required. Windmaster and Supavent models will both comfortably work on 90m2 of ceiling space. Anything above 90m2 will then put you into a position where 2 units will more than likely be required


How much to supply and install?

Provided that there is nothing out of the ordinary about your property we will generally work on a rate of $230.00ea (incl.GST) supply and install per unit to most residential properties. Different property configurations can sometimes force the unit to be positioned or placed further down the roofline where backflashing is required in order to maintain a watertight/weatherproof finish in this case i9t is prudent to allow between $60.00 and $65.00 per metre for the supply and installation of backflashing


What amount of air does each unit move?

On average each unit when spinning at 12km/h will shift roughly 45 litres of air/second


Does one unit perform better than the other in low wind conditions?

Yes. The Supavent is the preferred model in low wind conditions. The unit has a lighter mass and as a result will move or begin to spin easier


What happens when there is no wind on a hot day?

As heat builds up in the roof cavity and makes its way to the peak of the structure it will make its way toward exiting the cavity via the base of the ventilator. The exit action of the heated air will cause the vent to spin despite no external wind current existing. To put this into a practical example think of the way that water leaves a bath tub via the drain, as water leaves it spins. The same thing is happening here with the air and the vent


Why would I want the unit spinning during winter?

During the warmer months hot, dry air builds up in the roof cavity and the ventilator spins in order to remove that build up and as a result the house is kept fresher and cooler with less pressure on your insulation to perform. During the winter months however the air that builds up in the roof cavity is more stagnant and moist. This air, if left in the roof cavity would raise or increase the incidence of mould and mildew growth because of its moisture content compared to that generated in the warmer months; this is why it is advisable to allow the unit to spin freely all year round


How much to purchase only?

The Supavent costs $118.00 ea (incl.GST) and the Windmaster model costs $99.00 (incl.GST)


What is an under eave vent?

An under eave vent is a grille that measures approximately 400mmX200mm and as the name suggests is fixed to the underside of the properties eave(s). When fitted to a property these vents encourage or facilitate fresh air to enter or to be drawn into the roof cavity and help displace the stagnant air more efficiently. Although not entirely necessary to the system they do help the ventilator unit perform more efficiently in tin/Colorbond roof situations. Tile roofs tend to breathe better by design so the inclusion of these grilles is not always necessary


How many under eave vents will I need?

We suggest 4 under eave vents per ventilator placed at regular intervals around the properties perimeter. These are installed at the tradespersons discretion. Older style houses present the risk of the construction materials containing asbestos and as a result the decision to work on or cut building materials is solely at the discretion of the installer. Units can however be purchased for $7.00ea (incl.GST). Stainless steel grilles made to comply with BAL codes and bushfire zones are also available


What colours are available?

Windmaster and Supavent ventilators are available in the Colorbond range of colours. View the chart here. Windmaster ventilators are also available in mill (silver) finish


What warranty does each unit come with?

Each unit comes with a 15 year standard parts warranty. A labour warranty can be purchased for the life of the unit at the time of purchase for an additional $25.00 (incl.GST). If you purchase multiple units on the same day, the purchase of only one labour warranty is necessary to cover your purchases


What is a Spark Guard or Spark Arrestor?

A spark guard or spark arrestor is a stainless steel mesh circle that fits to the throat of the Windmaster or Supavent to prevent sparks from fires from entering the neck of the unit and making their way into your roof cavity, potentially causing a fire


How much slower will they perform with a spark guard fitted?

According to the manufacturer spark guards and arrestors will impede the units’ capacity to perform by roughly 30%


What wind speed can each model withstand?

Supavent is tested to withstand wind speeds of 205.2km/hr, whilst the Windmaster is capable of handling 158.4km/hr winds. For cyclone prone areas there are units that meet DTC (Darwin deemed to comply) standards on roof lines 4m above ground level


Can I specify where I want the unit installed?

You can. Our installer will advise you on the best location or placement of each unit in order to get the most out of your investment. Although at the end of the day the positioning of each unit is up to you


Can I have the ventilator work on just one room?

This is possible. From time to time clients will ask that we install a ventilator and connect it to a grille or diffuser via a length of flexible ducting (AKA nude duct) so the ventilators primary focus can be on one room of a property rather than a ceiling cavity


I have a Cathedral ceiling, what are my options?

Cathedral ceilings can still have ventilators fitted; the procedure is slightly different to the standard pitch roof installation in that a vent needs to be fitted to the underside of the ceiling in order for it to be effective. This does incur a higher installation rate. These jobs are priced on application. Click here to learn more


Do I need to be home when the units are being installed?

99% of the time you do not need to be present as the work is almost always able to be done externally. Cathedral ceilings and the jobs where under eave vents are being installed require someone to be at home, as a result of this lead times can vary. If you do wish to be present during an installation let our sales people know as this will effect lead times to installation