{"product_id":"galvanised-spiral-duct-160mm-x-3m-spir160","title":"Galvanised Spiral Duct 160mm x 3m SPIR160","description":"\u003cdiv style=\"font-size:16px;font-family:Arial,sans-serif;color:#222;max-width:900px;margin:0 auto;line-height:1.6;\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eSPIR160\u003c\/strong\u003e is a \u003cstrong\u003e160mm diameter, 3-metre length of galvanised spiral ducting\u003c\/strong\u003e, manufactured from \u003cstrong\u003espiral-wound galvanised mild steel to HVCA\/BESA DW144 specification\u003c\/strong\u003e. It forms the core straight-run component of a 160mm metal ducting system, suitable for general ventilation, mechanical extract, MVHR distribution, dust extraction, and fume control. The \u003cstrong\u003ehot-dip galvanised (Sendzimir) zinc coating\u003c\/strong\u003e provides long-term corrosion resistance without painting, and the smooth-bore interior keeps airflow resistance low along the run.\u003c\/p\u003e\n\n\u003cdiv style=\"display:flex;flex-wrap:wrap;justify-content:space-around;background:#e6f4f3;border-radius:6px;padding:8px 4px;margin:18px 0;\"\u003e\n\u003cdiv style=\"text-align:center;padding:12px 8px;\"\u003e\n\u003cdiv style=\"font-size:1.5em;font-weight:800;color:#008377;\"\u003e160mm\u003c\/div\u003e\n\u003cdiv style=\"font-size:.82em;color:#444;margin-top:2px;\"\u003eDiameter\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align:center;padding:12px 8px;\"\u003e\n\u003cdiv style=\"font-size:1.5em;font-weight:800;color:#008377;\"\u003e3m\u003c\/div\u003e\n\u003cdiv style=\"font-size:.82em;color:#444;margin-top:2px;\"\u003eLength per Section\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align:center;padding:12px 8px;\"\u003e\n\u003cdiv style=\"font-size:1.5em;font-weight:800;color:#008377;\"\u003eDW144\u003c\/div\u003e\n\u003cdiv style=\"font-size:.82em;color:#444;margin-top:2px;\"\u003eManufacturing Spec\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align:center;padding:12px 8px;\"\u003e\n\u003cdiv style=\"font-size:1.5em;font-weight:800;color:#008377;\"\u003eZ275\u003c\/div\u003e\n\u003cdiv style=\"font-size:.82em;color:#444;margin-top:2px;\"\u003eZinc Coating Grade\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align:center;padding:12px 8px;\"\u003e\n\u003cdiv style=\"font-size:1.5em;font-weight:800;color:#008377;\"\u003eFemale Ends\u003c\/div\u003e\n\u003cdiv style=\"font-size:.82em;color:#444;margin-top:2px;\"\u003eBoth Ends\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"background:#e6f4f3;border-left:4px solid #005c54;padding:12px 16px;margin:14px 0;border-radius:0 4px 4px 0;font-size:.95em;\"\u003e\n\u003cstrong\u003eFemale Tube System:\u003c\/strong\u003e Spiral duct of this type is manufactured \u003cstrong\u003efemale at both ends\u003c\/strong\u003e — all bends, tees, and reducers in the matching 160mm range are \u003cstrong\u003emale\u003c\/strong\u003e and slip directly inside the tube. To join two lengths of SPIR160 tube together, use the \u003cstrong\u003eSPIRC160 male connector\u003c\/strong\u003e.\u003c\/div\u003e\n\u003cdiv style=\"background:#fff8e1;border-left:4px solid #c77a00;padding:12px 16px;margin:14px 0;border-radius:0 4px 4px 0;font-size:.95em;\"\u003e\n\u003cstrong\u003eHandling — Sharp Edges:\u003c\/strong\u003e Cut and formed galvanised steel edges can be sharp. \u003cstrong\u003eWear cut-resistant gloves\u003c\/strong\u003e when handling, cutting, or installing spiral duct sections, and deburr any field-cut ends before assembly.\u003c\/div\u003e\n\n\u003cdiv style=\"background:#008377CF;color:#fff;padding:10px 16px;margin:28px 0 16px;border-radius:4px;font-size:1.05em;font-weight:700;\"\u003eKey Features\u003c\/div\u003e\n\u003cdiv style=\"display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px;margin:16px 0;\"\u003e\n\u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:6px;padding:16px 18px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#008377;text-decoration:underline;margin-bottom:8px;\"\u003eGalvanised Steel to DW144\u003c\/div\u003e\n\u003cdiv style=\"font-size:.92em;color:#333;\"\u003eManufactured to the \u003cstrong\u003eHVCA\/BESA DW144 specification\u003c\/strong\u003e for sheet metal ductwork — the recognised UK standard for spiral ductwork construction and performance.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:6px;padding:16px 18px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#008377;text-decoration:underline;margin-bottom:8px;\"\u003eZ275 Hot-Dip Zinc Coating\u003c\/div\u003e\n\u003cdiv style=\"font-size:.92em;color:#333;\"\u003eThe \u003cstrong\u003eSendzimir hot-dip galvanising process\u003c\/strong\u003e applies a 275g\/m² zinc coating, giving the duct strong corrosion resistance for long-term indoor and protected outdoor use without painting.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:6px;padding:16px 18px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#008377;text-decoration:underline;margin-bottom:8px;\"\u003eSmooth Internal Bore\u003c\/div\u003e\n\u003cdiv style=\"font-size:.92em;color:#333;\"\u003eThe spiral-wound construction produces a duct that is \u003cstrong\u003ealmost smooth on the inside\u003c\/strong\u003e, minimising turbulence and airflow resistance compared to flat-seamed ducting.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:6px;padding:16px 18px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#008377;text-decoration:underline;margin-bottom:8px;\"\u003eFemale-Ended Tube\u003c\/div\u003e\n\u003cdiv style=\"font-size:.92em;color:#333;\"\u003eBoth ends of the 3m length are \u003cstrong\u003efemale\u003c\/strong\u003e, accepting the male spigots of bends, tees, reducers, and connectors from the matching 160mm spiral range.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:6px;padding:16px 18px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#008377;text-decoration:underline;margin-bottom:8px;\"\u003eInherent Rigidity \u0026amp; Strength\u003c\/div\u003e\n\u003cdiv style=\"font-size:.92em;color:#333;\"\u003eThe spiral seam construction gives the tube \u003cstrong\u003egreater stiffness for a given gauge\u003c\/strong\u003e than equivalent longitudinal-seam ducting, helping the duct hold its shape under handling and installation.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:6px;padding:16px 18px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#008377;text-decoration:underline;margin-bottom:8px;\"\u003eWide Application Range\u003c\/div\u003e\n\u003cdiv style=\"font-size:.92em;color:#333;\"\u003eSuitable for \u003cstrong\u003egeneral ventilation, MVHR\/MEV distribution, dust extraction, fume extraction, and air conditioning\u003c\/strong\u003e ductwork in domestic, commercial, and light industrial settings.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"background:#008377CF;color:#fff;padding:10px 16px;margin:28px 0 16px;border-radius:4px;font-size:1.05em;font-weight:700;\"\u003eSpecifications\u003c\/div\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:.92em;margin:16px 0;\"\u003e\n\u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:600;color:#333;width:45%;border-bottom:1px solid #ddd;\"\u003eReference\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;color:#555;border-bottom:1px solid #ddd;\"\u003eSPIR160\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fff;\"\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:600;color:#333;width:45%;border-bottom:1px solid #ddd;\"\u003eDiameter\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;color:#555;border-bottom:1px solid #ddd;\"\u003e160 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:600;color:#333;width:45%;border-bottom:1px solid #ddd;\"\u003eLength\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;color:#555;border-bottom:1px solid #ddd;\"\u003e3,000 mm (3 m)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fff;\"\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:600;color:#333;width:45%;border-bottom:1px solid #ddd;\"\u003eMaterial\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;color:#555;border-bottom:1px solid #ddd;\"\u003eGalvanised mild steel — spiral-wound\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:600;color:#333;width:45%;border-bottom:1px solid #ddd;\"\u003eManufacturing Standard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;color:#555;border-bottom:1px solid #ddd;\"\u003eHVCA \/ BESA DW144\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fff;\"\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:600;color:#333;width:45%;border-bottom:1px solid #ddd;\"\u003eZinc Coating\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;color:#555;border-bottom:1px solid #ddd;\"\u003eZ275 (275 g\/m²), Sendzimir hot-dip galvanised\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:600;color:#333;width:45%;border-bottom:1px solid #ddd;\"\u003eEnd Configuration\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;color:#555;border-bottom:1px solid #ddd;\"\u003eFemale both ends\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fff;\"\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:600;color:#333;width:45%;border-bottom:1px solid #ddd;\"\u003eMax Continuous Operating Temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;color:#555;border-bottom:1px solid #ddd;\"\u003e~70°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 12px;font-weight:600;color:#333;width:45%;border-bottom:1px solid #ddd;\"\u003eTypical Applications\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;color:#555;border-bottom:1px solid #ddd;\"\u003eVentilation, MVHR\/MEV runs, dust \u0026amp; fume extraction, air conditioning\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003cdiv style=\"background:#008377CF;color:#fff;padding:10px 16px;margin:28px 0 16px;border-radius:4px;font-size:1.05em;font-weight:700;\"\u003eFrequently Asked Questions\u003c\/div\u003e\n\u003cdetails style=\"margin-bottom:8px;border:1px solid #c8e6e3;border-radius:4px;overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF;color:#fff;padding:11px 14px;cursor:pointer;font-weight:600;font-size:.95em;list-style:none;\"\u003eHow do I join two SPIR160 lengths together?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 14px;font-size:.92em;color:#333;background:#fff;\"\u003eUse a \u003cstrong\u003eSPIRC160 male connector\u003c\/strong\u003e. Since both ends of the tube are female, the male connector slides inside the female ends of the two adjoining lengths to create the joint.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin-bottom:8px;border:1px solid #c8e6e3;border-radius:4px;overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF;color:#fff;padding:11px 14px;cursor:pointer;font-weight:600;font-size:.95em;list-style:none;\"\u003eCan I cut the tube to a shorter length on site?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 14px;font-size:.92em;color:#333;background:#fff;\"\u003eYes — spiral duct can be cut with a jigsaw, angle grinder with a metal cutting disc, or tin snips for thinner gauges. \u003cstrong\u003eDeburr the cut edge\u003c\/strong\u003e thoroughly, as cutting removes the factory-formed female end and a connector will be needed at that end to mate with a fitting.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin-bottom:8px;border:1px solid #c8e6e3;border-radius:4px;overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF;color:#fff;padding:11px 14px;cursor:pointer;font-weight:600;font-size:.95em;list-style:none;\"\u003eIs this duct airtight straight out of the box?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 14px;font-size:.92em;color:#333;background:#fff;\"\u003eThe spiral-formed seam gives a good base level of airtightness, but for \u003cstrong\u003ehigher airtightness classes (Class C\/D to EN 12237)\u003c\/strong\u003e, joints should be sealed with an appropriate duct sealant or aluminium foil tape in addition to mechanical fixing (rivets or self-drilling screws).\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin-bottom:8px;border:1px solid #c8e6e3;border-radius:4px;overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF;color:#fff;padding:11px 14px;cursor:pointer;font-weight:600;font-size:.95em;list-style:none;\"\u003eCan this duct be used outdoors?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 14px;font-size:.92em;color:#333;background:#fff;\"\u003eThe Z275 galvanised coating provides good corrosion resistance, making the duct suitable for \u003cstrong\u003ecovered or sheltered external runs\u003c\/strong\u003e. For fully exposed long-term outdoor installations, consider additional weather protection or a higher-spec coating.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"margin-bottom:8px;border:1px solid #c8e6e3;border-radius:4px;overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF;color:#fff;padding:11px 14px;cursor:pointer;font-weight:600;font-size:.95em;list-style:none;\"\u003eWhat gauge is the SPIR160 manufactured to?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 14px;font-size:.92em;color:#333;background:#fff;\"\u003eStandard galvanised spiral duct in the 160mm size range is manufactured to \u003cstrong\u003eDW144 gauge requirements for that diameter\u003c\/strong\u003e — typically 0.6mm for 160mm. Refer to your supplier's DW144 gauge table for the exact specification at this diameter.\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e","brand":"AIZO - Quality Heating","offers":[{"title":"Default Title","offer_id":64982599139677,"sku":"SPIR160","price":74.9,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/GalvanisedSpiralDuct160mmx3mSPIR160.jpg?v=1781538469","url":"https:\/\/qualityheating.co.uk\/products\/galvanised-spiral-duct-160mm-x-3m-spir160","provider":"AIZO Quality Heating","version":"1.0","type":"link"}