Static cowl with cover 7L – 20 x 35 cm
Static cowl with cover type 7L for a 20 x 35 cm flue between two other flues, made of concrete with an external size of 42 x 45 cm and two short straight sides. Both short sides are vertical. The cowl therefore meets the cowls on the neighbouring flues on both sides, in a row of three or more flues. The two long 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.
Each flue gets its own cowl. The rings are dry-stacked and staggered on a clean, flat chimney top, so that the cover sits level.
| Feature | Value |
|---|---|
| Type | 7L |
| Item code | 134536 |
| Flue size (internal) | 20 x 35 cm |
| External size | 42 x 45 cm |
| Version | 2 short straight sides, 2 chamfered sides |
| Build-up | 3 or 4 rings + closed cover |
| Material | natural grey concrete |
Which size do I measure for type 7L? The internal size of the flue, here 20 x 35 cm. The cowl itself measures 42 x 45 cm externally.
Why a cover rather than an open crown? The cover fully shields the flue outlet from rain. For an open crown with bird mesh and deflector, see the Superior static cowl.
Does this cowl need power or maintenance? No. It works without moving parts and without a power supply.