Ducting
Rigid and flexible ducting, external cowls, and insulation wrap for cooker hood extraction. Why 150mm rigid duct is the standard, and how the wrong substitution silently kills extractor performance.
Activated Carbon Filters for Recirculating Cooker Hoods: What They Do and When to Replace
A UK guide to activated carbon filters in recirculating cooker hoods: how they work, why they cannot replace extraction under Part F, replacement intervals, compatible filter types, and what to buy.
Duct Cowls: External Vent Types, Anti-Rattle Advice, and What to Buy
UK guide to kitchen extractor duct cowls. Louvred, gravity flap, inline non-return valve, and render-finish options. Sizes 100mm, 125mm, 150mm. Prices from £4 to £110.
Duct Insulation Wrap: Why Loft Ducts Drip and How to Stop It
The UK guide to insulating kitchen extract ducts in lofts and cold voids. Approved Document F specification, product types, and how to fit it so the ceiling doesn't stain.
Flexible Ducting: Why It Fails and When It's Actually Acceptable
The UK guide to flexible extraction ducting. Why corrugated bore halves airflow, the 1.5m Building Regs limit, Part F commissioning risk, and which type to buy for cooker hoods.
Cooker Hood Grease Filters: Metal Mesh, Baffle and How Often to Clean Them
A UK guide to cooker hood grease filters: aluminium mesh vs baffle, why grease-saturated filters are a fire risk, cleaning intervals, dishwasher-safe vs hand-wash only, and what to replace.
150mm Rigid Ducting: The Correct Spec for Cooker Hood Extraction
UK guide to 150mm rigid cooker hood ducting. Why 150mm not 125mm, the 220x90mm flat-channel equivalent, Part F airflow rates, fittings, and where to source the full range.
Soffit and Tile Vent Terminals for Cooker Hood Extraction: Positioning and What to Specify
A UK guide to soffit vent terminals and roof tile vents for kitchen extraction: when to use each, 150mm duct compatibility, non-return requirements, frost protection, and what to buy.