{"title":"110mm x 54mm Rectangular Ducting","description":"\u003cp\u003e110mm x 54mm rectangular ducting, also called flat ducting, flat channel ducting or System 100 is a low-profile rigid PVC ductwork system equivalent in airflow to a 100mm round duct. The flat rectangular profile routes through ceiling voids, kitchen unit plinths, stud walls and service risers with far less intrusion than round ducting, which is why it's the default choice for UK domestic kitchen extract, bathroom extract, and tumble dryer runs where space is tight.\u003c\/p\u003e\n\u003cp\u003eWe stock the full Domus System 100 range in 110x54mm: 2m straight lengths, 90° horizontal and vertical bends, 45° horizontal and vertical bends, T-pieces, straight connectors (plain and with damper), duct clips, round-to-rectangular adapters, and DFS110 fire sleeves for fire compartment penetrations. Every item in the System 100 range is cross-compatible, so you can build a complete rectangular extract from fan or cooker hood to external cowl. \u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"\/collections\/rectangular-plastic-ducting\"\u003eAll Rectangular Ducting\u003c\/a\u003e \/ \u003ca href=\"\/collections\/rectangular-204-x-60mm\"\u003e204mm x 60mm\u003c\/a\u003e \/ \u003ca href=\"\/collections\/rectangular-220mm-x-90mm\"\u003e220mm x 90mm\u003c\/a\u003e \/ \u003ca href=\"\/collections\/round-plastic-ducting\"\u003eRound PVC Ducting\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eWhat is 110mm x 54mm ducting?\u003c\/h3\u003e\n\u003cp\u003e110mm x 54mm is a standard UK size of rigid rectangular PVC ducting — part of the Domus System 100 range. The \"System 100\" name reflects that it's airflow-equivalent to 100mm round ducting, which is the standard diameter for most domestic extract fans, cooker hoods and bathroom fans. The flat rectangular cross-section means the same airflow moves through a far shallower void — only 54mm deep — so the duct fits into spaces where a 100mm round pipe (100mm deep) wouldn't. That's why it's the go-to for running ducting through floor joists, over kitchen wall units, inside stud walls and through ceiling voids with minimal intrusion.\u003c\/p\u003e\n\u003ch3\u003eWhat is 110mm x 54mm ducting used for?\u003c\/h3\u003e\n\u003cp\u003eThe most common uses are kitchen cooker hood extract, bathroom and toilet extract fans, utility room and tumble dryer extract, and MVHR supply or extract branches where a flat profile routes more cleanly than round. It's specified in new-build and renovation projects where the extract fan is a 100mm (4 inch) unit and the duct run needs to cross a ceiling void, rise through a stud wall, or drop behind kitchen units. For airflow volumes equivalent to 125mm or 150mm round ducting, step up to 204x60mm or 220x90mm System 125\/150 equivalents.\u003c\/p\u003e\n\u003ch3\u003eIs 110mm x 54mm ducting the same as 100mm round?\u003c\/h3\u003e\n\u003cp\u003eAirflow-equivalent, yes — the 110x54 cross-sectional area is designed to match 100mm round ducting, so a 100mm extract fan or cooker hood can be run in 110x54 flat duct without significantly reducing performance. Physically they're different shapes, so you need a round-to-rectangular adapter (Domus DD070, in stock) to transition between the two — typically used at the fan or cowl end of the run. The rectangular duct itself is 110mm wide by 54mm deep externally.\u003c\/p\u003e\n\u003ch3\u003eWhat's in the Domus System 100 110x54 range?\u003c\/h3\u003e\n\u003cp\u003eThe full System 100 range in 110x54 covers everything needed for a complete extract run: 2m straight duct lengths, 90° bends in both horizontal and vertical orientations, 45° bends in both orientations, T-pieces for branched runs, straight connectors to join two duct lengths, connectors with integral dampers, round-to-rectangular adapters (110x54 to 100mm round), duct clips for fixing to joists or walls, and DFS110 fire sleeves for sealed penetrations through fire compartment walls and floors. All parts are push-fit with a neoprene gasket for airtight joints.\u003c\/p\u003e\n\u003ch3\u003eHow do I connect 110x54 ducting to a cooker hood or extract fan?\u003c\/h3\u003e\n\u003cp\u003eMost cooker hoods and extract fans have a 100mm (or 125mm\/150mm) round spigot, not a rectangular one. Use a round-to-rectangular adapter (Domus DD070 for 110x54 to 100mm round) as the first connection at the fan — the round side fits onto the fan spigot, the rectangular side accepts the 110x54 duct. From there, run in 110x54 rigid PVC with bends and connectors as needed, and typically finish with another round-to-rectangular adapter before a round external cowl or wall kit. Some cooker hoods have a direct rectangular 110x54 outlet option — check the hood's installation spec.\u003c\/p\u003e\n\u003ch3\u003eHow do I join 110x54 ducting sections?\u003c\/h3\u003e\n\u003cp\u003eThe Domus System 100 range is push-fit. Straight connector pieces (DD020, or DD027 with damper) join two lengths of 110x54 duct end-to-end. Bends and T-pieces have integral push-fit sockets at each end. For an airtight seal — important for MVHR and Building Regs extract — apply a bead of duct sealant inside the socket before pushing the duct home, then foil-tape over the joint externally. Fix runs every 600–800mm with the Domus 122-4 duct clip to stop deflection and reduce noise transmission.\u003c\/p\u003e\n\u003ch3\u003eDo I need a fire sleeve on 110x54 ducting?\u003c\/h3\u003e\n\u003cp\u003eIf the duct passes through a fire-rated wall, floor or compartment boundary, yes. Building Regulations require that any penetration through a fire compartment is sealed to maintain the fire rating — an unsealed duct creates a route for fire and smoke between compartments. The Domus DFS110 fire sleeve is designed to fit the 110x54 profile: it wraps around the duct at the penetration point and, in a fire, the intumescent material expands to close the opening. Common use cases are apartment extract risers, maisonette extract passing between floors, and any extract run crossing a fire-rated partition in flats or HMOs.\u003c\/p\u003e\n\u003ch3\u003eWhat's the maximum run length for 110x54 ducting?\u003c\/h3\u003e\n\u003cp\u003eFor a 100mm extract fan, the manufacturer's installation guide typically allows a maximum total equivalent run length of 6–12m, depending on fan model. Every bend in the run counts as additional equivalent length — a 90° bend is typically equivalent to around 1m of straight duct, a 45° bend around 0.5m. Keep runs as short as possible, minimise bends, and where a long run is needed consider specifying a stronger fan or stepping up to 204x60 (System 125) for lower pressure loss. Always check the specific fan or cooker hood spec sheet for its maximum permitted duct length.\u003c\/p\u003e\n\u003c!-- Schema: BreadcrumbList --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- Schema: Organization --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- Schema: Speakable --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- Schema: FAQPage --\u003e\n\u003cp\u003e \u003c\/p\u003e","products":[{"product_id":"domus-rigid-rectangular-plastic-ducting-110mmx54mm-2m-straight","title":"Domus - Rigid Rectangular Plastic Ducting 110mmx54mm 2m Straight","description":"\u003cp\u003e\u003cspan data-mce-fragment=\"1\"\u003eRigid Flat Duct is available in 2 meter lengths and is part of the system Domus range and is designed to achieve the highest possible energy efficiency from our ventilation appliances. Domus rigid duct is manufactured from exacting tolerances to virtually eliminate air leakage and reduce pressure drop.\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eSuitable for Bathroom, Toilet, Utility room and Whole House applications\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFree Area 5,300mm\u003csup data-mce-fragment=\"1\"\u003e2\u003c\/sup\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eColour - White\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Domus Ventilation","offers":[{"title":"Default Title","offer_id":42914612052202,"sku":"D1-2000","price":9.44,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0355\/3932\/0965\/products\/RigidDuct2mLength110x54.jpg?v=1652104173"},{"product_id":"domus-rectangular-flat-plastic-ducting-110x54-straight-connector-with-damper","title":"Domus Rectangular Flat Plastic Ducting 110x54 Straight Connector with Damper","description":"\u003cp\u003eStraight Duct Connectors are ideal for joining multiple duct lengths to form longer runs, and for connecting directly to the chosen MVHR or MEV whole house appliance.\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eSuitable for Bathroom, Toilet, Utility room and Whole House applications\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFree Area 5,300mm\u003csup data-mce-fragment=\"1\"\u003e2\u003c\/sup\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eColour - White\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFemale Connection\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eReduce the back-flow of air from the outside\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Domus Ventilation","offers":[{"title":"Default Title","offer_id":43548212592874,"sku":"DD027","price":2.9,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0355\/3932\/0965\/products\/DD027.jpg?v=1664198830"},{"product_id":"domus-rigid-rectangular-plastic-ducting-110x54-90-horizontal-bend","title":"Domus - Rigid Rectangular Plastic Ducting 110x54 90º Horizontal Bend","description":"\u003cp\u003e\u003cspan\u003e90º Horizontal Bend\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eSuitable for Bathroom, Toilet, Utility room and Whole House applications\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFree Area 5,300mm\u003csup data-mce-fragment=\"1\"\u003e2\u003c\/sup\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eColour - White\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFemale Connection\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Domus Ventilation","offers":[{"title":"Default Title","offer_id":43548222882026,"sku":"DD050","price":4.76,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0355\/3932\/0965\/products\/DD050.jpg?v=1664199036"},{"product_id":"domus-rigid-rectangular-plastic-ducting-110x54-45-horizontal-bend","title":"Domus - Rigid Rectangular Plastic Ducting 110x54 45º Horizontal Bend","description":"\u003cp\u003e\u003cspan\u003e45º Horizontal Bend\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eSuitable for Bathroom, Toilet, Utility room and Whole House applications\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFree Area 5,300mm\u003csup data-mce-fragment=\"1\"\u003e2\u003c\/sup\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eColour - White\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFemale Connection\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Domus Ventilation","offers":[{"title":"Default Title","offer_id":43548240543978,"sku":"DD055","price":4.29,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0355\/3932\/0965\/products\/DD055.jpg?v=1664199258"},{"product_id":"domus-rigid-rectangular-plastic-ducting-110x54-90-vertical-bend","title":"Domus - 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White\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFemale Connection\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Domus Ventilation","offers":[{"title":"Default Title","offer_id":43548271902954,"sku":"DD080","price":6.78,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0355\/3932\/0965\/products\/domus-ventilation-plastic-ducting.jpg?v=1728411295"},{"product_id":"domus-rectangular-flat-plastic-ducting-110x54-straight-connector","title":"Domus Rectangular Flat Plastic Ducting 110x54 Straight Connector","description":"\u003cp\u003eStraight Duct Connectors are ideal for joining multiple duct lengths to form longer runs, and for connecting directly to the chosen MVHR or MEV whole house appliance.\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eSuitable for Bathroom, Toilet, Utility room and Whole House applications\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFree Area 5,300mm\u003csup data-mce-fragment=\"1\"\u003e2\u003c\/sup\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eColour - White\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFemale Connection\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Domus Ventilation","offers":[{"title":"Default Title","offer_id":44142030553409,"sku":"DD020","price":4.76,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0355\/3932\/0965\/products\/DD020photo_jpg.jpg?v=1670319613"},{"product_id":"domus-system-100-round-to-rectangular-adapter-110x54-dia-to-100-dia","title":"Domus - System 100 Round To Rectangular Adapter 110x54 dia To 100 dia","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eThe Domus DD070 is a round to rectangular adaptor, with connection dimensions of 110 x 54mm at one end and a 100mm diameter at the other. The adaptor has a white PVC construction and is suitable for joining rigid duct with different profiles.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Domus Ventilation","offers":[{"title":"Default Title","offer_id":48600170856769,"sku":"DD070","price":3.54,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0355\/3932\/0965\/files\/DD070.jpg?v=1715206512"},{"product_id":"domus-dd015-system-100-rigid-plastic-ducting-110x54mm","title":"Domus - DD015 System 100 Rigid Plastic Ducting 110x54mm","description":"\u003cp class=\"MsoNormal\"\u003eThe Domus DD015 is a 1.5 metre straight length of rigid, rectangular ducting, which is constructed from white extruded uPVC. This System 100 product has dimensions of 110 x 54mm and is ideal for installation in bathrooms, toilets, utility rooms and kitchens.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFree space: 5300mm²\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Domus Ventilation","offers":[{"title":"Default Title","offer_id":48645877072193,"sku":"DD015","price":5.39,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0355\/3932\/0965\/files\/510_39dbd3b0-9d37-49d8-afba-3907eb0fe74f.jpg?v=1715603419"},{"product_id":"domus-122-4-system-100-duct-clip-110x54mm","title":"Domus - 122-4 System 100 Duct Clip 110x54mm","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eThe Domus 122-4 is a rigid duct clip which has a white HIPS (high impact polystyrene) construction and is quick and easy to fasten into place. This convenient fixing device can be used to securely hold runs of \u003c\/span\u003e110 x 54mm System 100 ducting\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003ein place.\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Domus Ventilation","offers":[{"title":"Default Title","offer_id":48652082282817,"sku":"122-4","price":0.85,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0355\/3932\/0965\/files\/122-4.jpg?v=1715686647"},{"product_id":"domus-dfs110-fire-sleeve-110x54mm","title":"Domus - DFS110 Fire Sleeve 110x54mm","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cspan class=\"MsoHyperlink\"\u003eDomus DFS110 is a horizontal, rectangular fire sleeve, which can provide up to 120 minutes of fire resistance when used with 110 x 54 rigid ducting systems. This conveniently designed product can help to prevent the spread of fire where Domus rigid ducting penetrates fire compartment walls.\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Domus Ventilation","offers":[{"title":"Default Title","offer_id":48705030783297,"sku":"DFS110","price":21.07,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0355\/3932\/0965\/files\/DFS204_d5c53447-0157-4b2f-a0d1-b27b22da4a42.jpg?v=1716324533"}],"url":"https:\/\/www.efans.co.uk\/collections\/110mm-x-54mm-rectangular-ducting.oembed","provider":"eFans Direct Ltd","version":"1.0","type":"link"}