Top 10 Boiler Vent Cowl UK – Chimneys

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1. Colt Cowl


Terracotta Rain Cap with Mesh Cowl Bird Guard For Chimney Pot 150mm to 250mm Diameter

Colt Cowl #ad - Reduces rain entry - chimny Pot Size between 125mm to 250mm in Diameter. Made from high quality materials. Suitable for wood, coal and oil. Keeps birds out with 25mm square solid fuel mesh. Comes complete with strap fixing kit.
BrandColt Cowl #ad
ManufacturerKaysted Ltd #ad
Part NumberECONG001



Bolier Flue Rain Cover Cowl

BOXULOCK #ad - Nb: uk gas safety regulations require that this MUST be fitted a minimum safe distance of at least 75mm above the flue pipe to allow boiler emitted water vapour and gases to disperse.

Fao gas safety engineers. Heat treated abs plastic with added UV protection coating. The cover has a depth of 20cm, 16cm wide and arc height of 11cm. Wall fixings included screws and wall plugs. The minimum safe distance is covered by the additional provisions for gas burning appliances Document J of the Gas Safety Regulations. Please check the dimensions to ensure it fits over your flue. Shields your flue and boiler from rain ingress and steam and gases blowback from strong winds. Easy to fit with the included fixings. Protect your bolier and flue from wind, rain and more. Refer to table to Diagram 34 in Document J.
ManufacturerBOXULOCK #ad
Height11 cm (4.33 Inches)
Length20 cm (7.87 Inches)
Width16 cm (6.3 Inches)
Warranty2 years.



Vent Cover/Cap, Ø 125mm / 5 inch Metal Chimney Cowl with Bird Guard, Rain Snow Hat, Exhaust Tube End

LIRAST #ad - Epdm rubber gasket ensures Tight Connections Between System Components. Featuring a concentric Top Cone to Stop any Water Entering Back Into Duct. Diameter of the connection: 125mm / 4. 9'' // made of Galvanized Steel Sheet. Ideal for spiral ducts or Flexible Ducts That Terminate up Through a Roof Space. Protection mesh prevents birds, Insects, Leaves and Others From Entering Into The Ductwork.
BrandLIRAST #ad
ManufacturerLIRAST #ad

4. Colt


Colt Cowls, Colt Rotorvent Ultralite 2 Rotating Chimney Cowl

Colt #ad - Ultra light - less than 2kg and Includes High Quality Strap Fixing Kit. Suitable for aLL Fuels including Smokeless Fuels. Certified to bs en 1856-2003-1. Fits chimney pots 80-250mm dia 80-160mm dia require hook bolts supplied separately. Tested to temperatures of 250 Deg C.
BrandColt #ad
ManufacturerColt Colws #ad
Weight2.36 kg (5.2 Pounds)
Part NumberCCRVA250T

5. StoveMaestro


StoveMaestro Anti downdraught chimney pot cowl bird guard Terracotta colour, strap fix

StoveMaestro #ad - Anti down draught bird guard. Stovemaestro Terracotta Chimney Cowl. Please note: only connect to chimney pots - not to any other type of fLUE PIPE.
BrandStoveMaestro #ad

6. Darco


Stainless Steel Chimney Flue Cowl Pipe Rain Cover Protector Cap Ending 100-130mm

Darco #ad - Cap in a box is a chimney cap of full value that fits in. Universal size: 100-130mm. A pizza box. Rigid design and reliable mounting method ensures that the cap is as durable and aesthetic as a chimney cap. Destination: ending of metal round chimney pipes; protects the chimney duct from rain or snow. Material: stainless steel. Unique mounting method, with no usage of tools needed, makes it a good solution for all chimney pipe endings.
BrandDarco #ad
ManufacturerDarco #ad
Weight0.07 kg (0.15 Pounds)
Part NumberDAP100-130-CH

7. Prostko LTD


Prostko Stainless Steel Chimney Cowl, Rain Cover Protector Stove Cap Top Burner Pipe Pot. 60mm / 2.36'', Silver

Prostko LTD #ad - Best to apply on Chimney, Fireplace, Stove. Suitable for use on applications fired by gas, oil and solid fuel. We supply our chimneys in silver colour. Cowls are made of acid-resistant chrome-nickel steel sheets in grade 1. 4404 according to din 17441 with a thickness of 05mm to 08mm. They are resistant to the corrosive effects of acidic condensate formed during the combustion process.
BrandProstko LTD #ad
ManufacturerProstko LTD #ad

8. AirTech-UK


AirTech-UK Stainless Steel Roof Cowl 150mm Ducting Pipe Woodburner Flue Liner Ventilation Pipe Rain hat Chimney Pot Roof Cowl rain Cover 150mm/6"

AirTech-UK #ad - Easy installation: installing the airtech-uk stainless Steel Roof Cowl is a breeze. Manufactured from stainless steel: our Roof Cowl is built to last, ensuring durability and resistance to the elements for years to come.

Plus, don't forget to remove the white-colored extra protective layer before use for the best results. Safeguard your chimney system from the elements and pests, air, keeping it in top condition. Enhances ventilation: improve the efficiency of your chimney with our Roof Cowl. Protects your chimney: rain, and unwanted avian visitors are no match for our Roof Cowl. Say goodbye to rust and corrosion worries! Roof cowl size options: choose the perfect fit for your chimney: Available in 150mm/6" size. It helps draw air up the chimney, ensuring a constant and efficient flow.
BrandAirTech-UK #ad
ManufacturerHCSINO GROUP #ad
Height19 cm (7.48 Inches)
Length31 cm (12.2 Inches)
Width31 cm (12.2 Inches)
Part NumberCowl 150mm
ModelCowl 150mm




ASA METAL PRODUCTS #ad - Will fit chimneys inside pot diameter from 7"up to10" 175mm up to 250mm. Simply adjust the prongs to suit. Manufacturd in the UNITED KINGDOM. Multi fuel galvanized steel chimney cowl. Complete with stainless steel fixing strap. For solid, gas, oil.
ManufacturerASA METAL PRODUCTS #ad
Height10 cm (3.94 Inches)
Length30 cm (11.81 Inches)
Weight1 kg (2.2 Pounds)
Width20 cm (7.87 Inches)

10. Prostko LTD


Chimney Liner End Cowl Ring Socket Collector Plug. 125mm, Prostko Stainless Steel Flue Pipe Cap

Prostko LTD #ad - They are mainly used for flue gas and they are resistant to the corrosive effects of acidic condensate formed during the combustion process. Stainless steel chimney Cowl specifically designed to easily terminate factory made insulated twin wall flue systems.

Caps are made of acid-resistant chrome-nickel steel sheets in grade 1. 4404 according to din 17441 with a thickness of 05mm to 08mm. The chimney cap protects the top of your flue from water entry, as well as animals and debris. Fitting a cowl on top of the chimney is an excellent way of preventing the smoke from flowing back down the chimney and into the house. Without a properly fitted chimney cap, the flue and fireplace are left completely exposed to water entry from rain.
BrandProstko LTD #ad
ManufacturerProstko LTD #ad