Do whirlybirds let rain in?

Do Whirlybirds make a difference to a roof?

That where whirlybird draw fresh air into roof cavity then draw out. I have two whirlybirds and 4 large vents hole around the eave. It is slight warm where before was like a sauna. I live in Queensland and the two whirlybirds in my roof do make a difference.

What do Whirlybirds need to survive?

Don’t forget that whirlybirds need vents for cool air to get in to the roof space to relace the hot air exracted by the whirlybirds. Vents in the eaves, probably, although other alternatives exist.

Will two whirlybirds on a tiled roof make a difference?

I am thinking of installing two whirlybirds on a tiled roof and just wanted to know if it will make a noticeable difference to the temperature within the house. It work well if you have the vents under eave. That where whirlybird draw fresh air into roof cavity then draw out.

How many Whirlybirds do I need to cool my Roof?

You would require about 20 whirlybirds and a large high velocity fan drawing cooler air into a roof space to remove the 1000+ watts per sq mtr captured from the sun by a roof. You need at least 30 changes of roof air space an hour to make a scrap of difference. How many litres is your roof – go figure.

Can I install a Whirly Bird to vent the attic?

In theory, you can install a whirly bird near the top ridge that can vent the attic space. But you do need an inflow of air into the attic to replace the hot air that rises to the top of the attic.

Will a whirlybird help with condensation on my roof?

I think a whirlybird can help with condensation – by letting the warmer moist air to escape. You will need eaves vents to aid in the air flow. Jack 0 Reply Ryan 3 years ago Hi Jack, I live in a 2 storey home with no roof sparking, as I have colorbond. The roof gets extremely hot in the summer, and I have ducted aircon. What’s my best option?

How high up should a Whirly Bird be on a roof?

Hi Anthony, Every situation is different. Generally, a whirly bird helps hot air to escape. It should be located as high up the slope of a roof as possible – because hot air rises. But there must be a air inlet lower down the roof to allow cooler air to replace the hot air that the whirly bird is trying to expel.

Do Whirlybirds take air from tiles?

the whirlybirds will take air from the easiest points which are through the gaps where your tiles fit. we have had whirlybirds right from start had to remove one last year was hearing weird wailing noise turned out the bearings were shot.

Will a whirlybird increase the amount of air in my roof?

Not many, if any. But the amount of air that excapes is not huge. (Pull up a tile in your roof, and see how much comes out of there, even with all the other gaps in the roof) Adding a whirlybird can increase that excape, helping out. Do remember, a whirlybird can help.

How many Whirlybirds does it take to heat a house?

The beauty being is that they still pump out the heat when the breeze dies, relatively quiet, cheap to run. As the add says, one of these is equal to 4 whirlybirds!!!! Big roof area may need 2 units.

How to cool down a whirlybird?

Ventilating that space will improve the situation. Whirlybirds are usually installed at the top of the roof space, exhausting the hottest of the air. Refilling with the cool air from under the house will cool the roof space. Might not work well in NT though.

Do Whirlybirds improve roof ventilation?

The better the insulation the less the benefit of roof ventilation. One interesting fact was that they found no benefit between rotating whirlybirds and fixed vents like the old chinaman hat style. The only noticeable difference in how much air was moved between vents tested related to the cross sectional opening of the vents.

Do whirly birds help with high humidity in Attic?

Hi Debbie, Whirly birds are designed to vent the attic space above the ceiling. They do nothing to the air movement in the living space. So, whirly birds will not help. Best to investigate ways to lower the humidity instead. Hope this helps.

Will a whirlybird help with condensation?

I think a whirlybird can help with condensation – by letting the warmer moist air to escape. You will need eaves vents to aid in the air flow. Jack

Why do people put whirly birds on tile roofs?

– Whirly birds are mainly for a steel roof where they dont have any other air vents. A tile roof is not sealed like a steel roof is, if you go into the cavity in a tile roof you will feel the breeze blowing through the tiles.

How many whirlybird roof vents do I Need?

How Many Roof Vents do I Need? “General rule of thumb is 1 Whirlybird for every 50m2 of roof void space. (For Published Install Prices in Sydney – Click Here) Average example is for a 2-3 bedroom house you’ll need approximately 2 roof vents.

What is a Whirly Bird/roof Turbo vent?

What does a Whirly Bird/ Roof Turbo Vent actually do? Turbo Vents are roof mounted turbine ventilators are wind driven “fans” that take out hot, polluted and stale air from the roof space.

How many whirly birds do I need on my roof?

When you install a whirly bird it’s generally a bit more expensive to install it on a two story home than it would be for a one story home. Referring back to Part 1 of our article, you’ll need at least 8-10 whirly birds on your roof to notice any considerable difference in the roof space temperature.

Why do Whirlybirds come out at night to cool down roofs?

After those times when the sun is at it’s least potent, the whirlybirds are still extracting the hot air from your roof. Leaving a potentially cooler house for the evening and sleep.

Can Whirlybirds breathe through roof tiles?

And for tiled roofs, there are enough gaps around each tile that the whirlybirds will be able to breathe. Also, stump mounted houses will have some flow coming from under the house up past the brick veneer / weatherboard into the roof space.

Why don’t Whirlybirds vacuum the space between tiles?

Whirlybirds create a tiny vacuum when spinning, bit its a really low pressure differential so air has got to be able to enter the roof space via a very low resistance path. The tiny gaps in between tiles arnt big enough.

Will a whirlybird ventilation system work for my roof?

The Solar Roof ventilation system may be more expensive. However, they are up to 30 times more effective. To circulate enough air to improve the temperature in your roof space, the whirlybird will unlikely make any noticeable difference to both the roof space temperature as well as the amount of heat that radiates through the ceiling of your house.

Do I need to ventilate my roof for Whirlybirds?

Unlikely extra ventilation will reverse the “undulations”, but probably still worth doing. Don’t forget that whirlybirds need vents for cool air to get in to the roof space to relace the hot air exracted by the whirlybirds.

Do whirly birds help with humidity?

Whirly birds are designed to vent the attic space above the ceiling. They do nothing to the air movement in the living space. So, whirly birds will not help. Best to investigate ways to lower the humidity instead. Hope this helps. Jack 0 Reply

Do whirlybird vents improve air flow?

Roof vents vs Whirly birds. I think the whirlybird (turbine) vents don’t actually improve air flow–They help to prevent back drafts (wind blowing back down the vent). For a fireplace, back drafts are smoky affairs.

Are Whirly Bird roof tiles a good idea for a house?

PogiPinoy writes… My parents had 3 whirly bird installed in their single storey 5 bedroom home, along with batts and dark coloured roof tiles. They may look great but they dont do you any favours when it comes to roofspace temperatures.

Do whirly birds help with attic ventilation?

Whirly birds are designed to vent the attic space above the ceiling. They do nothing to the air movement in the living space. So, whirly birds will not help.