If you’re looking at proper roof ventilation options, a whirlybird is a cost-effective, popular option among homeowners. In Australia, where the climate can be harsh and summer temperatures soar, installing a whirlybird is a practical way to keep your home cooler and reduce the need for air conditioning systems.
What Is a Whirlybird and How Does It Work?
Whirlybirds are ventilation devices that are mounted on the roof of a building. Like wind turbines, whirlybirds work by rotating when the wind blows against them, helping to expel hot air from the roof cavity. As they rotate, they pull stale, warm air out of the roof space.
As whirlybirds rely purely on wind power, there’s no need for electricity or moving parts, like fans or motors. The harder the wind blows, the faster the whirlybird spins, and the more effective it is.
How Much Does It Cost to Install a Whirlybird Roof Vent?
Whirlybird installation costs depend on the size of your home, the number of vents, and the materials needed. On average, a whirlybird can range from $150-$300, depending on the brand and type. The installation process can cost another $200-500, depending on the complexity and local labour rates.
Most homes require one or two whirlybirds, but larger properties may need more to ensure adequate ventilation. They’re an affordable option compared to the costly upfront and ongoing costs of air conditioning and other solutions.
Benefits of Whirlybirds for Roof Ventilation
Whirlybirds offer several advantages when it comes to roof space ventilation.
Cost Effective
We’ve already unpacked the costs of installing whirlybird vents, and their cost-effectiveness is one of their main benefits. They’re one of the most affordable options, both in terms of installation costs and maintenance. Whirlybirds provide long-term money savings.
Energy Efficient
Whirlybirds don’t need electricity to operate, providing a passive roof ventilation solution. This means it can help save energy consumption by reducing the load on air conditioning, which can lower electricity bills and improve energy efficiency.
Temperature and Moisture Control
Not only can these turbine vents extract hot air, but whirlybirds are effective at removing moisture-laden air from your roof space to improve air quality within your home. Moist air can lead to mildew build-up, damp conditions, and mould, which can, in turn, weaken the structure of your home.
Low Maintenance
Once installed, whirlybirds require very little maintenance. Without any electric or moving parts, whirlybirds aren’t vulnerable to breaking easily and can last many years – adding to their long-term value.
Limitations of Whirlybirds
While whirlybirds are a good choice for some homeowners, they do have some disadvantages.
Dependant on Wind
Whirlybirds rely on wind to work. On days with little wind, the vents may not move enough to provide adequate ventilation. However, they’ll still provide some airflow.
Effectiveness
Whirlybirds are effective in areas where the climate is mild or moderate. But if you live in an area with extreme heat or have a large roof space, then your whirlybird might not be effective enough on its own. You might need more than one or other ventilation options to ensure proper airflow.
Aesthetic
Some people aren’t a fan of how the whirlybird looks on the roof, especially if you have multiple. While there are modern options that are more sleek and attractive, you should check whether you’ll be happy with the look of your whirlybird on your home before investing.
Proper Installation for Effective Roof Ventilation
Incorrect placement or poor installation can cause air leaking or insufficient airflow. It’s a good idea to seek professional installation; here are our tips.
- Positioning: Whirlybirds should be positioned evenly across the roof for even ventilation. If you have a larger roof, you might need more vents. Speak to a professional about how many whirlybirds you need.
- Sealing: Properly sealing your whirlybird will stop rainwater from entering your home and stop drafts and heat loss.
- Height: For maximum efficiency, you should install your whirlybird at the highest point on the roof, where hot air and wind are at their strongest.l
Why Is Roof Space Ventilation Important?
Roof ventilation is vital for the overall health of your home. Roof ventilation is important for:
- Preventing heat building up
- Preventing moist air from accumulating, leading to dampness and mould
- Prolong the lifespan of your roof
Whirlybird Maintenance and Upkeep
While whirlybirds are a relatively low effort to look after, they still require maintenance and upkeep to ensure they live a long time – and you get your money’s worth. To get the most out of your whirlybird, you should conduct regular inspections and fast repairs.
1. Regular Inspections
It’s a good idea to inspect your whirlybird at least once a year, especially after extreme weather. Check for any signs of damage, such as bent or broken fins, and ensure the unit spins freely without obstruction.
2. Lubrication
If you notice any squeaking or resistance, apply a light lubricant to the moving parts to keep the unit spinning smoothly.
3. Remove Debris
Ensure that the whirlybird is free of debris, such as leaves, branches, or dirt, which could obstruct its movement. Cleaning off dirt can also help prevent wear and tear.
Alternatives to Whirlybirds
While whirlybirds are a popular choice, there are plenty of other ventilation options to choose from.
- Powered ventilators: They force air out of the roof space. They’re more effective than whirlybirds in areas with little wind, but they consume electricity and require more maintenance.
- Solar-powered vents: Using solar energy to power a fan, solar vents offer an energy-efficient alternative to electric fans, but the initial installation costs are higher than for whirlybirds.
- Ridge vents: Installed along the peak of a roof, ridge vents offer a passive ventilation solution that allows continuous airflow.
Whirlybirds: A Cost-Effective Solution
Whirlybirds are a good choice for many homeowners, especially if you live in a windier area. While some homeowners prefer more powerful motored alternatives, the whirlybird is a cost-effective and popular option for many.
FAQs
Are Whirlybirds Really Effective?
Yes, whirlybirds are effective at reducing heat in roof spaces, especially in regions with strong wind. They offer a passive and cost-effective option for homeowners.
Is a Helicopter Called a Whirlybird?
The term “whirlybird” is a colloquial term for helicopter ventilation solutions, which are so-called for their rotating blades.
Do Whirlybirds Make Houses Colder in Winter?
While whirlybirds cool your home with ventilation, they don’t make buildings colder in winter. Generally speaking, whirlybirds only allow warm air to escape only when excess heat is trapped in the roof space. If you’re worried about your homes getting cold in winter, make sure you properly seal gaps.