Manrose Cowl Vent Brown 140 x 140mm Product Code: 14789

HIPS polystyrene. Compliant with Part F of the Building Regulations. Suitable for commercial and domestic use with 100mm round pipe or 110 x 54mm rectangular ducting. Not suitable for gas appliances and must not have grilles or flaps obstructed designed for products such as ventilation and extraction fans, etc.


  • Suitable for Outdoor Use
  • Surface-Mounted
  • W x D x Lg: 140 x 83 x 140mm
  • Model No: 41032
  • Channel Width: 100mm


W x D x L: 140 x 83 x 140mm. Channel width: 100mm. Free air space: 14,700mm². Fixings Not Supplied.
Additional Information
Technical Specification
  • Brand : Manrose
  • Product Length : 140 mm
  • Product Type : Cowl Vent
  • Fixings Supplied : Fixings Not Supplied
  • Suitable Use Type : Suitable for Outdoor Use
  • Model No : 41032
  • Product Width : 140 mm
  • Channel Width : 100 mm
  • Colour : Brown
  • Product Depth : 83 mm
  • Pack Size : 1
  • Shape : Square
  • Manufacturer Guarantee : 3 Year Manufacturer's Guarantee (T&Cs Apply)
  • Pieces in Pack/Case : 1
  • Wall Ventilation Air Flow : 14,700 mm²
Product Contents
Delivery & Returns


Standard delivery service up to 3 working days: €8.95

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€4.45 Incl. 23% VAT

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Manrose Cowl Vent Brown 140 x 140mm is rated 3.9 out of 5 by 40.
Rated 3 out of 5 by from Quality plastic, poor design Good quality plastic and easy to install but the draught flap taps away constantly in the wind. Could do with being ever so slightly more weighted and some rubber/foam stoppers. Problem solved with a bit of tape.
Date published: 2017-10-24
Rated 4 out of 5 by from OK but hard to install The description doesn't make it clear but this does have a flap built in which is what you want for a dryer or extractor fan. It can be removed if you're trying to let air into the house rather than out but then you'd need something to stop the bugs getting in, probably some mesh on the inside of the wall. Hard to install because if you don't get the wall perfectly flat and plumb, the flap won't cover the hole correctly and any breeze will either get into the house or make the flap bounce which makes an annoying noise. Shame because I already had that problem with the flap vents. Looks fine on the wall.
Date published: 2017-10-04
Rated 5 out of 5 by from Got it covered A neat solution for the outside of the utility room extractor fan. Would have like one in black.
Date published: 2017-09-21
Rated 5 out of 5 by from Ducting Great service , good selection of products , good price , and staff very helpful . Would always recommend screwfix.
Date published: 2017-08-23
Rated 5 out of 5 by from Very easy to fit I had no trouble fitting this and it worked perfectly with the inline extractor fan I had bought which is probably the most powerful of its class on the market. I read others reviews of this cowl before purchasing and made my own mind up, I had no trouble with anything breaking or falling apart, I think the trick may be to be patient and not to force anything as its plastic. After removing the cover with a slight squeeze to the sides, the cowl was fitted to a white pipe (Screwfix item: 15872) with a few small stainless self tappers. The pipe passed through a 110mm hole drilled in the gable end cavity wall of the attic which left ample material to drill fixing holes for red no: 8 plugs and screws. The unit works flawlessly if fitted level, correctly and not over tightened so as to distort. Its of light plastic construction so does not need to be over engineered in the way of fixing. A small bead of clear silicone was applied to the top, bottom and sides to stop insects such as earwigs or ladybirds finding their way through the brickwork pointing and making nests behind the plastic.
Date published: 2017-04-11
Rated 1 out of 5 by from Too noisy I thought this looked like a much detter solution than the louvred ones which always rattle, but I was wrong it doesn't rattle it bangs. I can't stand the noise it has to go.
Date published: 2017-02-01
Rated 5 out of 5 by from Good buy Needed a new vent to replace a louvre vent which let cold air into my bathroom. Price is excellent and quality seems to be fine. Now fitted cold draughts in my bathroom have now improved considerably.
Date published: 2017-01-28
Rated 4 out of 5 by from Good product Bought to replace an old one. Works as it should and easy to fit
Date published: 2017-01-21
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