{"title":"220mm x 90mm Rectangular Ducting","description":"\u003cp\u003e220mm x 90mm rectangular ducting — also called flat channel ducting or Domus Megaduct System 150 — is the largest size in the domestic rigid rectangular PVC range, equivalent in airflow to a 150mm round duct. It's the default choice for MVHR trunk lines, large kitchen cooker hoods with 150mm spigots, and any domestic or light-commercial extract where the airflow volume exceeds the capacity of 204x60 Supertube.\u003c\/p\u003e\n\u003cp\u003eWe stock the full Domus Megaduct range in 220x90: 2m straight lengths, 1m shorter lengths, 90° vertical bends, 45° bends (horizontal and vertical), T-pieces for branched runs, straight connectors (DD920 and 981), channel connectors for joining lengths at the same level, a Megaduct straight duct connector, round-to-rectangular adapters (220x90 to 150mm), in-line step-down adapters (220x90 to 204x60) for transitioning to smaller branches, 220 channel clips for fixing, and DFS220 fire sleeves for fire compartment penetrations. \u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"\/collections\/rectangular-plastic-ducting\"\u003eAll Rectangular Ducting\u003c\/a\u003e \/ \u003ca href=\"\/collections\/rectangular-110mm-x-54mm\"\u003e110mm x 54mm\u003c\/a\u003e \/ \u003ca href=\"\/collections\/rectangular-204mm-x-60mm\"\u003e204mm x 60mm\u003c\/a\u003e \/ \u003ca href=\"\/collections\/round-plastic-ducting\"\u003eRound PVC Ducting\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eWhat is 220mm x 90mm ducting?\u003c\/h3\u003e\n\u003cp\u003e220mm x 90mm is a standard UK size of rigid rectangular PVC ducting — part of the Domus Megaduct System 150 range. The \"System 150\" name reflects that it's airflow-equivalent to 150mm round ducting, the standard diameter for large kitchen cooker hoods and MVHR trunk lines. The flat rectangular cross-section — 220mm wide by 90mm deep — routes through ceiling voids, service risers and floor zones where a 150mm round duct (150mm deep) wouldn't fit without dropping the ceiling.\u003c\/p\u003e\n\u003ch3\u003eWhat is 220mm x 90mm ducting used for?\u003c\/h3\u003e\n\u003cp\u003eThe main uses are MVHR trunk lines carrying combined supply or extract flow from multiple rooms back to the unit, large kitchen cooker hoods with 150mm spigots (typically wider island or high-output range hoods), tumble dryer extract on commercial laundry installations, and domestic-scale commercial extract where the airflow volume exceeds 204x60 capacity. On MVHR systems, 220x90 typically forms the trunk from the unit with branches stepping down to 204x60 before each room terminal.\u003c\/p\u003e\n\u003ch3\u003eIs 220mm x 90mm ducting the same as 150mm round?\u003c\/h3\u003e\n\u003cp\u003eAirflow-equivalent, yes. The 220x90 cross-sectional area matches 150mm round ducting, so a 150mm extract fan, cooker hood or MVHR unit performs similarly to a 150mm round run. Physically different shapes, so a round-to-rectangular adapter (Domus 970, 220x90 to 150mm, in stock) is needed to transition — typically at the fan, MVHR unit, or external cowl. The rectangular duct itself is 220mm wide by 90mm deep externally.\u003c\/p\u003e\n\u003ch3\u003eWhat's in the Domus Megaduct 220x90 range?\u003c\/h3\u003e\n\u003cp\u003eThe full Megaduct range in 220x90: 2m straight lengths (D4-2000), 1m shorter length (915), 90° vertical bends, 45° bends in both horizontal and vertical orientations, T-pieces for branched runs, Megaduct 220 channel connectors for joining duct at the same level, Megaduct straight duct connectors, round-to-rectangular adapters (220x90 to 150mm), in-line step-down adapters (220x90 to 204x60) for transitioning trunk-to-branch on MVHR systems, Megaduct 220 channel clips for fixing, and DFS220 fire sleeves.\u003c\/p\u003e\n\u003ch3\u003eHow do I step down from 220x90 to 204x60?\u003c\/h3\u003e\n\u003cp\u003eThe Domus 958 in-line rectangular adapter (220x90 to 204x60, in stock) is a direct push-fit transition piece. It's the standard component for MVHR installs where the trunk line runs in 220x90 from the unit and branches step down to 204x60 before reaching each room's supply or extract terminal. Fit the adapter at the point where the trunk splits into branches — usually above a ceiling void or service riser. On the 220x90 side, push-fit into a Megaduct connector or T-piece; on the 204x60 side, continue in Supertube range parts.\u003c\/p\u003e\n\u003ch3\u003eCan I use 220x90 ducting for a cooker hood?\u003c\/h3\u003e\n\u003cp\u003eYes, for cooker hoods with a 150mm spigot — typically larger island hoods, high-output range hoods, and some professional-grade domestic hoods with extraction rates above 600 m³\/h. Use the Domus 970 round-to-rectangular adapter at the hood to transition from 150mm round spigot to 220x90 rectangular. For standard domestic hoods with 125mm spigots, use 204x60; for 100mm spigots, use 110x54. Always check the hood's installation spec — using a smaller duct than specified will restrict airflow and can void the hood warranty.\u003c\/p\u003e\n\u003ch3\u003eHow do I join 220x90 Megaduct sections?\u003c\/h3\u003e\n\u003cp\u003eMegaduct uses push-fit joints. Straight connectors (DD920, 981, or 920) join two lengths end-to-end. Channel connectors (910) are for continuous level joining. Bends and T-pieces have integral sockets. For airtight joints — essential on MVHR and building-regs extract — apply duct sealant inside the socket before pushing home, then foil-tape over the joint. Fix horizontal runs every 600–800mm with the Megaduct 922 channel clip to prevent sag.\u003c\/p\u003e\n\u003ch3\u003eDo I need a fire sleeve on 220x90 ducting?\u003c\/h3\u003e\n\u003cp\u003eYes, wherever the duct penetrates a fire-rated wall, floor or compartment boundary. Building Regulations require sealed penetrations to maintain the fire rating. The Domus DFS220 fire sleeve fits the 220x90 profile and contains intumescent material that expands during a fire to close the opening. This is particularly relevant on MVHR trunk lines in apartments, HMOs and multi-storey housing where the trunk typically crosses multiple compartments between unit and terminals.\u003c\/p\u003e\n\u003ch3\u003eShould I insulate 220x90 ducting in a cold loft?\u003c\/h3\u003e\n\u003cp\u003eYes. MVHR trunks carrying warm extract air through unheated lofts condense internally when the duct surface drops below dewpoint — the resulting moisture pools, drips, and over time damages the MVHR unit and ceilings. Wrap 220x90 runs with foil-backed mineral wool or proprietary duct insulation (25mm minimum) continuously through any unheated space. Unlike 204x60, there is no off-the-shelf thermal-insulated Megaduct range, so site-applied insulation is the standard approach for 220x90 cold-space runs.\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-220x90-x-2m-straight","title":"Domus - Rigid Rectangular Plastic Ducting 220x90 x 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 17,968mm\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":42914642919658,"sku":"D4-2000","price":31.9,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0355\/3932\/0965\/products\/RigidDuct2mLength110x54_f40b14ed-871a-4f6b-9745-1e3f73b01401.jpg?v=1652104709"},{"product_id":"domus-rectangular-flat-plastic-ducting-220x90-straight-connector","title":"Domus Rectangular Flat Plastic Ducting 220x90 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 17,968mm\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":46382552842561,"sku":"DD920","price":5.62,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0355\/3932\/0965\/files\/920.jpg?v=1692727632"},{"product_id":"domus-megaduct-straight-duct-connector-220x90mm","title":"Domus - Megaduct Straight Duct Connector 220x90mm","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eThe Domus 920 is a rigid duct straight connector, which can be used to connect multiple lengths of \u003c\/span\u003e220 x 90mm Megaduct channel\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003ein order to form longer runs. The product has a white HIPS construction (high impact polystyrene) and can also be used for direct connection to a chosen MVHR or MEV whole house appliance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003eSuitable \u003cmeta charset=\"utf-8\"\u003e\u003c\/span\u003efor Kitchen, Commercial and Whole House Applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cmeta charset=\"utf-8\"\u003eFree area -17,968mm2\u003c\/li\u003e\n\u003cli\u003e\n\u003cmeta charset=\"utf-8\"\u003eProvide an airtight connection to Domus Flexible Hose and include threaded options\u003cmeta charset=\"utf-8\"\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Domus Ventilation","offers":[{"title":"Default Title","offer_id":48600115642689,"sku":"920","price":5.64,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0355\/3932\/0965\/files\/920_2ab041b5-747e-46cb-b284-45b3937595ce.jpg?v=1715205209"},{"product_id":"domus-rigid-rectangular-plastic-ducting-220x90mm-45-vertical-bend","title":"Domus - Rigid Rectangular Plastic Ducting 220x90mm 45º Vertical Bend","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eThe Domus 975 is a rigid ducting vertical 45° bend, which allows a change of direction with runs of \u003c\/span\u003e220 x 90mm MegaDuct ducting\u003cspan class=\"MsoHyperlink\"\u003e. The bend has a white HIPS (high impact polystyrene) construction and a female connection.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Domus Ventilation","offers":[{"title":"Default Title","offer_id":48600137105729,"sku":"975","price":7.54,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0355\/3932\/0965\/files\/DD075_218a1357-8e52-48f4-a5d0-99774936848d.jpg?v=1715205559"},{"product_id":"domus-round-to-rectangular-adapter-220x90-dia-to-150-dia","title":"Domus - Round To Rectangular Adapter 220x90 dia To 150 dia","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eThe Domus 970 is a round to rectangular adaptor, with connection dimensions of 220 x 90mm at one end and a 150mm 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":48645249171777,"sku":"970","price":9.97,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0355\/3932\/0965\/files\/DD070_7c95fc56-13e5-44df-94b4-4701b2866f95.jpg?v=1715597728"},{"product_id":"domus-dfs220-fire-sleeve-220x90mm","title":"Domus - DFS220 Fire Sleeve 220x90mm","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eThe Domus DFS220 is a horizontal fire sleeve, providing 60 minutes of fire resistance when used with 220 x 90mm 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":48645824446785,"sku":"DFS220","price":49.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0355\/3932\/0965\/files\/DFS204_5cd0f1ae-59ca-428d-ab00-0f7e80af7f82.jpg?v=1715602969"},{"product_id":"domus-915-rigid-plastic-ducting-220x90mm","title":"Domus - 915 Rigid Plastic Ducting 220x90mm","description":"\u003cp class=\"MsoNormal\"\u003eThe Domus 915 is a 1.5 metre straight length of rigid, rectangular ducting, which is constructed from white extruded uPVC. This MegaDuct product has dimensions of 220 x 90mm and is ideal for kitchens, commercial environments and whole house applications.\u003c\/p\u003e","brand":"Domus Ventilation","offers":[{"title":"Default Title","offer_id":48652115607873,"sku":"915","price":19.06,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0355\/3932\/0965\/files\/510_ac1d63e6-ca7d-418b-857d-8ac40f84a930.jpg?v=1715688811"},{"product_id":"domus-rigid-megaduct-plastic-ducting-220x90mm-45-horizontal-bend","title":"Domus - Rigid Megaduct Plastic Ducting 220x90mm 45º Horizontal Bend","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eThe Domus 955 is a rigid ducting 45° horizontal bend, which has a white HIPS (high impact polystyrene) construction and a female connection. This convenient joining accessory is designed to connect \u003c\/span\u003e220 x 90mm MegaDuct ducting\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003elengths to extend or change the direction of runs.\u003c\/span\u003e\u003c\/p\u003e","brand":"Domus Ventilation","offers":[{"title":"Default Title","offer_id":48652161417537,"sku":"955","price":9.4,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0355\/3932\/0965\/files\/955.jpg?v=1715692282"},{"product_id":"domus-982-megaduct-horizontal-plastic-ducting-220x90mm-t-piece","title":"Domus - 982 MegaDuct Horizontal Plastic Ducting 220x90mm T Piece","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eThe Domus 982 is a rigid ducting horizontal T-Piece, allowing the installer to branch off from the main trunk and incorporate two additional duct runs horizontally on either side, enabling a more flexible installation. The T-Piece has a white HIPS (high impact polystyrene) construction and is compatible with \u003c\/span\u003e220 x 90mm MegaDuct ducting\u003cspan class=\"MsoHyperlink\"\u003e.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Domus Ventilation","offers":[{"title":"Default Title","offer_id":48693285290305,"sku":"982","price":16.42,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0355\/3932\/0965\/files\/DD080_d46bda25-86ff-4c59-a16e-b2dacc3575e3.jpg?v=1716226038"},{"product_id":"domus-in-line-rectangular-adapter-220-x-90mm-to-204-x-60mm","title":"Domus - In-Line Rectangular Adapter 220 x 90mm to 204 x 60mm","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eThe Domus 958 is an in-line rectangular Supertube adaptor with female connections on both sides. The adaptor has a white PVC construction and is suitable for changing a run of 220 x 90mm rigid ducting to a system with dimensions of 204 x 60mm.\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Domus Ventilation","offers":[{"title":"Default Title","offer_id":48693879537985,"sku":"958","price":7.9,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0355\/3932\/0965\/files\/958.jpg?v=1716231054"},{"product_id":"domus-megaduct-220-channel-connector","title":"Domus Megaduct 220 Channel Connector","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eThe Domus 910 is a 1 metre straight length of rigid, rectangular 220 x 90mm flat channel, which is part of the Megaduct range. The duct has a white extruded uPVC construction and is suitable for use in kitchens, as well as commercial and whole house applications. It is also designed with high levels of air tightness and system efficiency.\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Domus Ventilation","offers":[{"title":"Default Title","offer_id":48704647856449,"sku":"910","price":11.34,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0355\/3932\/0965\/files\/510_92096fba-21c7-46f2-9c3f-56f28a50c25e.jpg?v=1716316865"},{"product_id":"domus-922-megaduct-220-channel-clip","title":"Domus - 922 MegaDuct 220 Channel Clip","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eThe Domus 922 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\u003e220 x 90mm MegaDuct ducting\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003ein place. Two components are required per fitting.\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Domus Ventilation","offers":[{"title":"Default Title","offer_id":48816435265857,"sku":"922","price":1.24,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0355\/3932\/0965\/files\/522.jpg?v=1715165036"},{"product_id":"domus-rigid-rectangular-plastic-ducting-220x90-90-vertical-bend","title":"Domus - Rigid Rectangular Plastic Ducting 220x90 90º Vertical Bend","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan class=\"MsoHyperlink\"\u003eThe Domus 960 is a rigid ducting vertical 90° bend, which allows a change of direction with runs of\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e220 x 90mm MegaDuct ducting\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"MsoHyperlink\"\u003e. The bend has a white HIPS (high impact polystyrene) construction and a female connection.\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Domus Ventilation","offers":[{"title":"Default Title","offer_id":48844137070913,"sku":"960","price":9.32,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0355\/3932\/0965\/products\/DD060.jpg?v=1664199352"},{"product_id":"domus-rectangular-flat-plastic-ducting-220mm-x-90mm-straight-connector","title":"Domus Rectangular Flat Plastic Ducting 220mm x 90mm Straight Connector","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eThe Domus 981 is a rectangular flexible hose connector, which can be used to extend runs of 220 x 90mm ducting. This convenient joining accessory can be used with ducting typically found in kitchens, commercial environments and whole house applications.\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Domus Ventilation","offers":[{"title":"Default Title","offer_id":48845966573889,"sku":"981","price":4.16,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0355\/3932\/0965\/files\/981.jpg?v=1717709113"}],"url":"https:\/\/www.efans.co.uk\/collections\/220mm-x-90mm-rectangular-ducting.oembed","provider":"eFans Direct Ltd","version":"1.0","type":"link"}