This can vary due to your boiler but for most purposes 75mm above the boiler flue. Protects your boiler from damaging rain ingress in heavy rain and wind. It was also protect your boiler in the event of guttering failure.
eBay
Double Valve Faucet 90 Degree Double Valve Water Tap Brass Double Water Tap Outdoor Hose Faucet for Gardens Patios Boiler Drain
Aliexpress UK
Protect your boiler and flue from wind, rain and more. Easy to fit with the included fixings. NB: Ensure to leave enough head room during install to allow the steam to escape and not back vent into the flue.
eBay
4pcs Radiator Pipe Covers 15*200mm 300mm 500mm Radiator Pipe Covers Black White Radiator Pipe Covers Pipe Decorative Cover
Aliexpress UK
The Flue Vent Rain Cover is crafted through advanced 3D printing technology to provide precision and long-lasting quality. Ideal for patios and outdoor spaces, it enhances the functionality of your heating systems while blending seamlessly into any setting.
eBay
Cover for Outdoor Swing, Cover for Patio Swings Protective Cover Swing Cover Winterproof for 2-3 Seater Waterproof 160x120x170cm
Aliexpress UK
The Flue Vent Rain Cover is crafted through advanced 3D printing technology to provide precision and long-lasting quality. Ideal for patios and outdoor spaces, it enhances the functionality of your heating systems while blending seamlessly into any setting.
eBay
VShaped Garden Furniture Cover Waterproof Garden Sofa Covers 420D Oxford Rattan Corner Sofa Cover LShape Garden Corner Covers O
Aliexpress UK
This can vary due to your boiler but for most purposes 75mm above the boiler flue. Protects your boiler from damaging rain ingress in heavy rain and wind. It was also protect your boiler in the event of guttering failure.
eBay
4pcs Outdoor Furniture Cover Set Includes an Outdoor Sofa Cover,Two Chair Covers,And a Coffee Table Cover.
Aliexpress UK
Not suitable for condensing boiler flues or coastal installations, due to corrosive effects of both types of installation. ZINC PLATED.
eBay
210D Oxford Protective Cover Garden Furniture Covers,Patio Furniture Covers Garden Table Cover Waterproof Windproof
Aliexpress UK
Safeguard your boiler and flue against wind, rain, and adverse weather conditions with this easy-to-install cover. Boiler Flue & External Pipe Rain Cover. UK Gas Safety Regulations mandate a minimum safe distance of at least 75mm above the flue pipe for proper dispersion of water vapour and gases emitted by the boiler.
eBay
Garden Swing Canopy Seat 3 Seats Covers Swing Canopy Cover Kit/Set Swing Cover Set Patio Swing Top Cover Replace Accessories
Aliexpress UK
Black Boiler Flue & External Pipe Rain CoverSafeguard your boiler and flue against wind, rain, and adverse weather conditions with this easy-to-install cover. Key Features: Protects from rain ingress and prevents steam and gas blowback caused by strong winds.
eBay
Outdoor Furniture Dust Cover 210D Oxford Cloth Garden Chair Cover Sofa Cover Waterproof Outdoor Patio Table Furniture Cover
Aliexpress UK