The H Cowl is probably the ultimate static anti downdraught chimney cowl, as it completely isolates the combustion gases from the prevailing winds.
Manufactured using high quality stainless steel grade 316 makes this H Cowl suitable for use with appliances fired by oil or solid fuel. Please note that this H Cowl is NOT suitable for use with appliances fired by gas. Please see the gas versions that we have available.
Suitable for use with 100mm internal diameter pipes.
The H cowl has a shaft which is just slightly under the diameter of the cowl, so for example, a 125mm H Cowl will have a shaft with a diameter of around 120mm. It then slides inside the chimney or flue system.
Fitting to a prefabricated chimney system
Slide the cowl inside the chimney system. Secure in place with stainless steel self tapping screws and seal with a high temperature silicone or sealant.
Fitting to a masonry chimney stack or pot
Slide inside the chimney or pot and mortar in place.
Just what we needed Good price, quick delivery and slotted in perfectly where the old one had been for years. Can't fault the service and the product seems fine. (03/09/2012) -
order arrived quickly as promised very easy to fit as advised by your office,very happy with the result. thanks (03/05/2013) A. williams - Wales
PREMIUM PRODUCT AND 5* SERVICE I HAVE AN OIL AGA - 20 YEARS AGO I FOUND THE H COWL WAS THE ONLY COWL TO STOP DOWN DRAUGHT. I LIVE HIGH UP IN A VERY WINDY LOCATION SO TRIED VARIOUS STYLES OF COWLS, THEN CAME ACROSS THE H COWL.PERFECT NEVER HAD A PROBLEM SINCE AND PURCHASED MY THIRD H COWL RECENTLY. (02/03/2015) -
H-Cowl Good product, well made, easy to fit. (10/04/2015) -
All good so far thanks! (07/02/2018) Mike - @ sea
Brilliant service great product (10/10/2018) Lee - Nottingham
Excellent performer Repeated problem with downdraft and resulting fumes from boiler . Completely eradicated problem and it has been well tested in recent gales. (08/04/2019) - Scotland
Sturdy without being heavy, and very neatly made. The product description proved to be 100% accurate, and fitting was straightforward. The cowl represents good value for money, and should have an excellent life expectancy. Delivery was prompt, and the order was carefully packaged to avoid damage. (10/04/2019) Phil B. - Stockport
Guaranteed Solution at a Price The H cowl is going to prevent any downdraught, no question, as the combustion gasses and prevailing wind are completely isolated from each other. The downsides are that it's physically large and, ioho, ugly. There is no fixing method as such, it needs to be cemented in place. Does the job though. (07/05/2011) fluesystems.com - High Wycombe