H Shaped Chimney Cowl

This rotating action prevents the wind from blowing down the chimney stack.

H shaped chimney cowl. Revolving chimney cowls revolving chimney cowls are designed to eradicate downdraught in chimneys flues and ducts. With the dragon the wind turns the cowl in the opposite. The h cowl is made from stainless steel recommended for solid fuels including coal wood and oil. An h cowl can be fitted to a round flue or pot with internal diameters between 100mm to 304mm.

In order to comply with regulations h cowls for gas come factory fitted with mesh birdguard inserts. The h cowl will prevent rain ingress and promote positive updraught. There are two types. The h cowl is made from a durable corrosion proof stainless steel with a terracotta finish and is designed to fit the majority of conventional chimney pots.

Although the h cap has a distinctive advantage over most other downdraft caps it fell out of favor because of its bulky looks. It then slides inside the chimney or flue system. These are constructed from h shaped pipes and work by separating the combustion gases from the turbulence and winds that bring down the drafts. The most popular type of chimney cowl is the h style or h pot and it has a definite advantage over other caps because it stabilizes the draft so your fireplace works more efficiently.

It is an age old method to regulate draft in situations where prevailing winds or turbulence cause downdraft and backpuffing. Normally caused by low chimney stacks and obstructions that can be around the chimney pot and is mostly noticeable when winds are blowing in a certain direction. How the h cowl chimney. Chimney cowls are hoods that fit over the top of a chimney stack.

Stainless steel rotating chimney cowl. This cowl is strap fitted and hand made from 316 stainless steel and is suitable for all fuels. Fitting to a prefabricated chimney system slide the cowl inside the chimney system. Fit easily within minutes no tools are required to assist the fitting process you simply use adjustable toggle clamps to secure the h cowl to the chimney pot.

The o h cowl is the recommend cowl for blow backs in a fire place. Before buying this type of chimney cowl make sure the cowl is designed to handle the fuel you re burning such as wood natural gas or fuel oil and make sure the base fits your chimney. A h style cap cowl is a chimney top constructed from chimney pipes shaped like the letter h. It has no moving parts once fitted and will be silent in whatever weather conditions.

An adapter for a square chimney pot is available. This causes the wind to flow around the cowl which actually causes an increase in chimney draft.