Top Color:
Main Color:
Bottom Color:


H Cowls are manufactured from stainless steel and are designed as anti-down draught devices. In normal or still air conditions, the hot gases and smoke pass up the chimney and exit out of the top of both of the vertical tubes. If wind drives downwards in turbulent conditions, the air moving down the tubes induces suction as it passes the horizontal tube and the hot gases and smoke exit out of the bottom of the vertical tubes. They are available in the size range from 4” – 12” with a stainless steel or sprayed matt black finish for use with stainless steel flue systems. There is also an 8” version available in a terracotta powder coated finish with toggle attachment clamps for use with clay chimney pots.



  • Prevents Downdraughts
  • Corrosion Resistant
  • Stainless Steel Construction
  • Range of Sizes 4” to 12”
  • Various colours available
  • Easy Fit Toggle Clamp System (Chimney Pot Version)

Technical Data:


Cowl Material: 0.55mm 304 Stainless Steel
Size Range – Stainless Steel Flues: 4”, 5”, 6”, 7”, 8”, 10” & 12”
Size – Clay Chimney Pot: 8” (Easy Fit Toggle Clamp System)
Surface Finish: Bright Annealed Stainless Steel
  Sprayed Matt Black or
  Powder Coated Terracotta
Maximum Temperature:  200°C
Conforms to: E.N. 1856-1-2009