It is to be mounted on gravitation based (natural) ventilation or flue (gas, oil) ducts. Stainless steel chimney cowl cover. A chimney cap of full value that fits in. a pizza box. This type of cap is a device which protects the chimney duct from rain, snow or birds nesting.
eBay
Spiral duct cowl is a component fitting of Spiraduct system. Fittings slot inside duct. Spiral Ducting Cowl. Manufactured from galvanized mild steel.
eBay
BRITCOWL - MADE IN UK. ALL PURPOSE BIRD GUARD COWL FOR KEEPING OUT RAIN AND BIRDS LIKE JACKDAWS FROM NESTING IN CHIMNEYS. ALSO REDUCES DOWN DRAUGHT FROM STRONG WINDS AND AIDS LIGHTING FIRE.
eBay
Designed to prevent rain, birds, vermin and leaves entering used or unused chimney flues. this cowl is suitable for woodburning, solid fuel and oil burning appliances This product provides good ventilation and gives protection against wind and rain.
eBay
CHIMNEY POT ANTI DOWN DRAUGHT RAIN COWL/CAP FOR MULTIFUEL STOVE WOODBURNER TERRACOTTA INC BIRD GUARD! This anti down draught cowl is designed to deflect strong winds from entering the flue and causing down draught problems.
eBay
SaveCap SILVER Chimney pot cap capper top for disused chimneys. for keeping out birds and rain, ALSO still allows ventilation to prevent damp in chimney. Designed to prevent rain, birds, and debris entering unused chimney flues.
eBay
Manufactured from galvanized mild steel. Spiral duct cowl is a component fitting of Spiraduct system. Fittings slot inside duct. Sizes are nominal. Actual appearance/scale of product may vary dependent on size.
eBay
CHIMNEY POT ANTI DOWN DRAUGHT RAIN COWL CAP FOR MULTI FUEL STOVE WOOD BURNER. This cowl is designed to deflect strong winds from entering the flue and causing down draught issues. While also protecting the flue from rain and debris as well as birds with a built in bird guard.
eBay