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 stainless steel grade 316.
These H Cowls have no mesh inserts, and are suitable for use with appliances fired by oil or solid fuel.
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.
H-Cowl Good product, well made, easy to fit.
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.
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.
order arrived quickly as promised very easy to fit as advised by your office,very happy with the result. thanks
A. williams - Wales
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.
fluesystems.com - High Wycombe