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 125mm 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, Best £92.00 Ever Spent. BRILLIANT!!!!!!!! Location wise we are as bad as it gets. Coastal, VERY windy, In amongst trees, Short Flue, need I go on. Non Fumo have taken my newly commissioned multi fuel stove from non operational due to serious downdraught to working like a beauty. Problem solved instantly. "ABFAB" Many Thanks To John (25/05/2011) Warm & Toastie Jan - Scotland
Good quality part, good service The cowl turned up really quickly and was just what I needed. It was a replacement for a galvanized cowl that had rotted so I knew it would do the job. Very happy with the quality, ease of ordering and the quick delivery. (08/10/2012) -
Does the job! Very happy both with the H cowl - downdraft problems considerably improved, and with the excellent service. Many thanks. (13/02/2013) - Galloway, SW Scotland
Beats ending up smoked like a kipper! This cowl solved a severe downdraught problem where exposure to Northumbrian hooleys (technical term for a high wind) caused anyone within a radius of 10' from the woodburner to be instantly kippered. Nicely made and affordable item (17/02/2013) -
Quick service all as expected. (04/03/2013) -
Amazing efficient and prompt service! So pleased with results, we have a cosy room we can use without fear of being smoked out (02/05/2013) -
GOOD ADVICE, VERY GOOD PRODUCT, GREAT SERVICE very helpful when contacted for advice. This cowl does exactly what it says on the tin.My Rayburn wood stove works better than it ever did. Many thanks. (06/05/2013) elfyn - N W WALES
Excellent Excellent product and service, fast delivery. Would recommend AAA+++ (08/07/2013) Buildingworks - Co. Down
125mm H Cowl Excellent company to deal with,had this item specially made for me as they are out of stock. Don't waste money on the cheaper anti downdraught cowls as believe me they don't work. Spend the little bit extra at the beginning to avoid trying every anti downdraught cowl on the market. WORKS A TREAT (15/01/2014) -
Smoke free at last! Was having trouble with my woodburner as I had terrible downdraught when there were strong winds which meant the fire was unusable as it filled the house with smoke. This was a major problem living as I do in a windy part of the world. This cowl has resolved the problem and was easy to install. (06/01/2016) Lesley - Boulton