Whirlybird Installation, Ventilation, and Instructions

Whirlybirds Roof Vents – Do Whirlybirds Work?

What is a Whirlybird – How do Whirlybirds Work?

Whirlybirds are a common sight throughout Australian residential and industrial areas, sitting on tops of roofs and working away day in and day out to provide cooling to the home below.

To understand what a roof whirlybird is and how it works, it’s important to have a basic understanding of the functions of your roof.

Roofs are designed to act as heat traps, in much the same way a greenhouse screen prevents heat from escaping.

The roof keeps heat in the roof cavity, letting it circulate before it ends up accumulating in the interior of the home.

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This is great during winter, when homes need all the help they can get to stay warm, but it proves an issue during summer, when particularly hot days will send temperatures soaring within the home, leading to increased energy expenditure and rising energy bills as air-conditioners struggle to keep up with the demands the hot day has placed on them.

One way to treat this problem of rising heat levels in the home, whilst keeping electricity costs down, is the installation of roof ventilators.

These are tools that are designed to manage the temperatures within the roof space, which has a carry-on effect to the heat that is sent to move through the home’s interior and raises temperatures as a result.

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Roof ventilators have an additional benefit in winter, when they’re not needed for heat control purposes – they’re also able to reduce the risk of deterioration which could arise as a result of increased moisture levels settling in the roof throughout the winter season.

Whirlybirds offer a cost-effective solution across all seasons with a design that is flexible for the weather’s needs.

A Whirlybird offers a cost-effective solution across all seasons with a design that is flexible for the weather’s needs.

One of the most popular roof ventilation products is the Whirlybird, which was also one of the original roof ventilation systems to hit the market.

Tried and true, the Whirlybird has been a standard roof ventilation option in both the residential and industrial market for decades. Its design functionality and cost-effective price point keep it competitive even as more modern inventions pave the way for further roof ventilation options.

A roof whirlybird works by removing heat that has accumulated in the roof space via convection currents.

They’re generally made of either galvanised steel or aluminium, and possess a fluted head set on top of ball bearings that give the Whirlybird its spinning capacity.

As they mimic the external appearance of a turbine, many people also refer to them as ‘turbine vents’.

Whirlybirds are designed with engineered fins that ‘scoop’ the wind.

The vent is rotated as the result of the wind which blows through the turbine, and this turning motion has the effect of creating a vacuum, efficiently ‘sucking’ the hot air out of the home and roof’s interior and dispelling it into the outside world through its vents.

Roof whirlybirds have their effectiveness measured via their ‘air flow capacity’. The general residential type of whirlybird will have the ability to move between 8-150 cubic metres of air per hour.

Multiple whirlybirds can also be installed to add to the overall airflow capacity and resulting cooling. Industrial whirlybirds are much larger, and when hit with strong winds, are able to move between 2,500-5,000 cubic metres per hour, providing industrial buildings with a natural cooling method that also keeps their energy bills from soaring as a result of the large air conditioning system that would be required to achieve the same results.

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Types of Whirlybirds

There are two main types of Whirlybirds: one is active and powered, whilst the other is passive and is wind-driven only. Powered Whirlybirds are electrically powered in comparison. Wind-powered Whirlybirds are the cheaper alternative and are preferred by most people due to the cost savings.

These days Solar Whirlybirds are a cost effective alternative to grid powered whirlybirds over the long run. Initially, the cost of the solar powered whirlybird is much higher than the regular powered option but saves you money over the long run.

However, if investing in a wind-driven Whirlybird, make sure your geographical region and weather conditions are going to provide the constant wind you need across the majority of hot summer days so your Whirlybird has the power source it needs to effectively suck hot air out of the roof space and expel it outwards.

Some people may choose to install more than one Whirlybird depending on the size of their roof, home and the ventilation and cooling needs they have for that particular region. As Whirlybirds are not cost-prohibitive, they make sense for larger homes and industrial estates where lots of hot air needs to be sucked out in order for the property to remain cool.

Benefits and reasons to install a Whirlybird

There are many reasons to install a Whirlybird, the first being the significant cost savings that will impact upon your back pocket over the course of time.

Any Australian can tell you how much their air conditioning bills have been known to sky rocket over particularly hot summers, with anywhere up to hundreds of dollars in excess energy use impacting on the average household budget as rising summer temperatures place pressure on home cooling systems.

In comparison, a Whirlybird might only set you back between $60-$100. This upfront cost will pay itself off over the course of a single summer season, let alone the years that follow. The attractive savings Whirlybirds offer are one of the top reasons people choose to install them in comparison to other roof ventilation options.

Another attractive reason to install a Whirlybird is their eco-friendliness. Although they work on a 24-hour shift, they’re completely ‘green’, particularly if you buy the wind-powered Whirlybird.

Whirlybirds are one of the most environmentally friendly options available on the market when it comes to natural home cooling. With many home designs moving towards more eco-friendly power options and design implementations, this can make the Whirlybird an attractive choice if green energy is a priority.

As well, Whirlybirds come in a wide variety of colours. This range means you’re able to match your roof’s colour or find a colour that complements the existing material. They can also be installed on a range of different surfaces, so no matter what kind of roof you have, it’s likely the Whirlybird is an option for you.

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