Venturi Chimney Cap

The vacu stack creates a venturi that causes flue gases to flow up and out of the chimney.

Venturi chimney cap.

The streamline flow of the wind around the vacu stack prevents wind from blowing into the chimney even when the wind is deflected downward. Free shipping on prime eligible orders. Our fireplaces accessories category offers a great selection of fireplace chimney caps and more. The secret to getting a flue to draw is to have a constriction in the chimney.

Call 877 244 6349 we install vacu stack chimney caps. Vacu stack chimney caps are wind resistant chimney caps also known as high wind flue caps chimney wind deflectors chimney wind caps etc. Basically a venturi is a tube with a constricted. There are no moving parts to bind or malfunction.

And as i explored that notion i became convinced that a chimney cap designed to create a venturi effect would be the answer to my problem. This work on the venturi principle and is named after an italian physicist giovanni batista venturi 1746 1822. A concentric shroud venturi cowl or parallel rain excluder will allow the smoke to travel upwards and significantly reduce the amount of rain entering the chimney. Air moving up the chimney has to compress to get through the gap of the constriction once through the chimney opens out and the pressure in the rising.