Twirly Roof Vent

[Chooksaurus]

Quote:
They work both ways.

It would really depend on the construction of the coop. When we build, I plan to have a storage area above the coop, so they are definitely in the plans for me. But for a regular coop, I don't think they are necessary.

 

[patandchickens]

Quote:
They are indeed good for large spaces that *cannot* have giant holes cut in the walls, such as attics and hay barns.

However that does not really apply to chicken coops. Chicken coops can, and in nearly all cases SHOULD, have giant holes cut in their walls

rendering the twirly roof vents (I can't stop saying it either! LOL) totally superfluous.

Edited to add:

They work both ways.

-- Actually the link you provide does *not* show that; it only shows that this is not the only forum on which the discussion has occurred

The fact remains, nobody has shown either practical or theoretical indications that in still air the turbine removes more air than a simple hole in the roof would. Cuz, it doesn't

Pat​

 

[spartacus_63]

O K you guys are now debating who knows more about bubble shaped twirly things!!! How ridiculous. The bottom line on the roof vents is that they do work! They are designed for a specific square footage. Bigger is better than smaller in most cases. You only need soffit vents if you are working in an enclosed attic. If the coop is open, and the roof is not finished then any ventilation will suffice as long as it is equal to or greater than what would be required with soffit vents. They do work better when the wind is blowing, but it has nothing to do with the spinning of the turbine, it has everything to do with the movement of air through a confined space. They would only work better with the top removed if the interior temperature created more volume than the vent was designed to circulate and with the size of the coop here, it would have to be hot enough to cook the eggs.

Also a register that can be closed will restrict the ventilation and loss of heat somewhat. If you put some type of insulator on top of the register (similar to what they use in RVs) it would reduce heat loss more but would also negate any ventilation.

If it is free you can hardly go wrong. They are easy to install and rarely leak when done properly. Plus who can resist having a twirling bubbly thing on their coop?

 

[BigBen]

These roof turbines are light weight and on ball bearings..they will spin if a chicken farts.
I am amaised thet people who have no idea what they are talking about comment like it is gosspel.
It is obvious you have no idea how much energy is created my the heating of the sun, espesially when it is cold and the temperature contrast is even greater.
When hunting..Thermal heating plays a huge role in the wind. The sun only needs to shine on the gound for a very short time and the heat starts the air to rise. Multiply that by about 10x in a close insulated box.
Also remeber that the roof vents will only remove as much air as air is allowed in.
If the lower part of the coop is air tight with no vents..the roof vents won't be able to remove any air.

 

[patandchickens]

Quote:
+1

However that is exactly WHY they emit hot air without a breeze -- because hot air rises through that hole (and short chimney) in the roof.

The turbine aspect is not involved in that at all.

And with or without a breeze, if your coop has decent size openings in it, which it NEEDS to, then the turbine is just not going to do any extra good for you, even on a windy day.

By all means one can install one if it's just a fun project, there's no harm in that at all - but realize that it is merely decoration when installed on a small very open building like a coop (as opposed to, say, an attic, where they really CAN make a difference)

Over and out,

Pat

 

[BigBen]

One of the atvantages to installing a turbine is that when there is no sun or heat to cause the turbine to spin and suck out air..all it takes is a small wind or breeze to do the same thing.
I have vented soffets,4 windows and a hinged board a the highest point of the coop and with all that ventalation the sun still spins the turbine to make the stagnent air move.
The only people who don't like turbine vents are the people who forgot to install one or can't afford them.
Reguardless of what anyone thinks a turbine will do for them..they work well and it is based on scientific fact...not opinions.

 

[spartacus_63]

Lets not forget that these vents are designed to vent air & moisture. In the case of chickens, the moisture is at least as important as the air, especially in the winter. More moisture means higher humidity! Bad for chickens. The physics behind the twirly bulbble thingies is irrelevant to the person who posted the question. The question was, will it do what I want/need. The answer to that is YES. And you probably do not need to worry about heat loss through the vent except during extreme cold. You can always install a register and close it at night or when you feel you need to and see how the air in the coop is affected. I have a thermometer and hygrometer to monitor condition inside the coop and adjust ventilation accordingly. So far I have had no complaints from my girls...and that is what is important! Happy chickens equals LOTS of eggs!

 

[patandchickens]

Yes, but large holes in the walls work much better.

Pat

 

[LynneP]

I see them from time to time here, both on barns and coops. I think if I were offered one free and if my coop were a mite bigger, I'd um, give it a whirl.

Sorry that had to come out...

Just caught your pic, BigBen (dialup)- nice setup...