H Shaped Chimney Cowl

There are two types.

H shaped chimney cowl.

It then slides inside the chimney or flue system. 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. How the h cowl chimney. These are constructed from h shaped pipes and work by separating the combustion gases from the turbulence and winds that bring down the drafts.

Stainless steel rotating chimney cowl. This causes the wind to flow around the cowl which actually causes an increase in chimney draft. 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. An h cowl can be fitted to a round flue or pot with internal diameters between 100mm to 304mm.

Fitting to a prefabricated chimney system slide the cowl inside the chimney system. 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. With the globe type the wind catches the fins and the globe rotates. In order to comply with regulations h cowls for gas come factory fitted with mesh birdguard inserts.

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. The h cowl will prevent rain ingress and promote positive updraught. This rotating action prevents the wind from blowing down the chimney stack. It is an age old method to regulate draft in situations where prevailing winds or turbulence cause downdraft and backpuffing.

Chimney cowls are hoods that fit over the top of a chimney stack. It has no moving parts once fitted and will be silent in whatever weather conditions. The h cowl is made from stainless steel recommended for solid fuels including coal wood and oil. They are designed to increase the upwards movement of air in the flue ensuring that any smoke or other harmful gasses produced by a fire are quickly removed from your home.

With the dragon the wind turns the cowl in the opposite. This cowl is strap fitted and hand made from 316 stainless steel and is suitable for all fuels. An adapter for a square chimney pot is available. A h style cap cowl is a chimney top constructed from chimney pipes shaped like the letter h.

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. The o h cowl is the recommend cowl for blow backs in a fire place.