Static cowl with cover 4A – 20 x 30 cm

Static cowl with cover in concrete, with one short straight side and three chamfered sides, for a flue from 20 x 30 to 20 x 50 cm next to another flue. The short side is vertical, so the cowl fits against a neighbouring flue at the short end. The other three sides are chamfered and deflect rain and wind.

At the top a closed cover fully shields the flue outlet from rain. Below it, 3 or 4 profiled rings keep the draught stable in any wind direction. There are no moving parts, no maintenance and no power supply. The concrete is natural grey.

Choose the type by the internal size of the flue. Each flue gets its own cowl, sized to that flue.

The rings are dry-stacked and staggered on a clean, flat chimney top, so that the cover sits level.

When do I choose a cover rather than an open crown? When the flue outlet must be fully shielded from rain. For the open crown with bird mesh and deflector, see the Superior static cowl.

What do you mean by the short end? The short side of a rectangular flue. If two flues touch at their short sides, the straight side of this cowl goes on that side.

Is this also a bemalkap? Yes, in Flanders it is called a bemalkap, bemal or tiratrek. It is also known as an anti-downdraught cowl or chimney cowl.