{"product_id":"radial-semi-rigid-ducting-75mm-x-50m-coil-mvhr-antibacterial-antistatic-duct","title":"Radial Semi-Rigid Ducting 75mm x 50m Coil - Anti-Microbial \u0026 Anti-Static MVHR Duct","description":"\u003c!-- SEO Product Name: Casavent SRD-75-50 Radial Semi-Rigid Ducting 75mm x 50m Coil - Anti-Microbial \u0026 Anti-Static MVHR Duct --\u003e\n\u003cdiv style=\"font-size: 16px; max-width: 900px; margin: 0 auto; color: #2b2b2b; line-height: 1.6; font-family: Arial, Helvetica, sans-serif;\"\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.7; color: #2b2b2b; margin: 0 0 16px 0;\"\u003eThe \u003cstrong\u003eCasavent SRD-75-50\u003c\/strong\u003e is a 75mm diameter radial semi-rigid air duct supplied as a \u003cstrong\u003e50 metre coil\u003c\/strong\u003e, designed for MVHR (Mechanical Ventilation with Heat Recovery) and MEV radial ductwork installations in residential properties. Built with a \u003cstrong\u003edual-layer HDPE construction\u003c\/strong\u003e, the duct combines a corrugated outer layer for mechanical strength and flexibility with a smooth inner bore enriched with an \u003cstrong\u003eantistatic and antimicrobial additive\u003c\/strong\u003e that reduces electrostatic tension and minimises dust accumulation along the duct walls.\u003c\/p\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.7; color: #2b2b2b; margin: 0 0 16px 0;\"\u003eRadial ductwork runs individual duct lengths from a central manifold or distribution box directly to each supply or extract point, rather than branching off a single trunk line. This simplifies installation, supports balanced airflow across a property, and allows the duct to be routed through ceiling voids, suspended ceilings, walls, or floors.\u003c\/p\u003e\n\u003ctable role=\"presentation\" width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"margin: 20px 0;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding-right: 8px;\"\u003e\n\u003ctable role=\"presentation\" width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"background: #008377CF; border-radius: 6px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center; padding: 14px 6px;\"\u003e\n\u003cdiv style=\"font-size: 19px; font-weight: bold; color: #fff; line-height: 1.2;\"\u003e75mm\u003c\/div\u003e\n\u003cdiv style=\"font-size: 11px; font-weight: 400; color: #fff; margin-top: 4px; opacity: 0.95;\"\u003eOutside Diameter\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding-right: 8px;\"\u003e\n\u003ctable role=\"presentation\" width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"background: #008377CF; border-radius: 6px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center; padding: 14px 6px;\"\u003e\n\u003cdiv style=\"font-size: 19px; font-weight: bold; color: #fff; line-height: 1.2;\"\u003e60mm\u003c\/div\u003e\n\u003cdiv style=\"font-size: 11px; font-weight: 400; color: #fff; margin-top: 4px; opacity: 0.95;\"\u003eInternal Diameter\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding-right: 8px;\"\u003e\n\u003ctable role=\"presentation\" width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"background: #008377CF; border-radius: 6px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center; padding: 14px 6px;\"\u003e\n\u003cdiv style=\"font-size: 19px; font-weight: bold; color: #fff; line-height: 1.2;\"\u003e50m\u003c\/div\u003e\n\u003cdiv style=\"font-size: 11px; font-weight: 400; color: #fff; margin-top: 4px; opacity: 0.95;\"\u003eCoil Length\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding-right: 8px;\"\u003e\n\u003ctable role=\"presentation\" width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"background: #008377CF; border-radius: 6px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center; padding: 14px 6px;\"\u003e\n\u003cdiv style=\"font-size: 19px; font-weight: bold; color: #fff; line-height: 1.2;\"\u003e290mm\u003c\/div\u003e\n\u003cdiv style=\"font-size: 11px; font-weight: 400; color: #fff; margin-top: 4px; opacity: 0.95;\"\u003eBending Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding-right: 8px;\"\u003e\n\u003ctable role=\"presentation\" width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"background: #008377CF; border-radius: 6px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center; padding: 14px 6px;\"\u003e\n\u003cdiv style=\"font-size: 19px; font-weight: bold; color: #fff; line-height: 1.2;\"\u003e394N\u003c\/div\u003e\n\u003cdiv style=\"font-size: 11px; font-weight: 400; color: #fff; margin-top: 4px; opacity: 0.95;\"\u003eCompression Strength\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003ctable role=\"presentation\" width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"background: #008377CF; border-radius: 6px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center; padding: 14px 6px;\"\u003e\n\u003cdiv style=\"font-size: 19px; font-weight: bold; color: #fff; line-height: 1.2;\"\u003e-25°C to +90°C\u003c\/div\u003e\n\u003cdiv style=\"font-size: 11px; font-weight: 400; color: #fff; margin-top: 4px; opacity: 0.95;\"\u003eService Temperature\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable role=\"presentation\" width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"margin: 18px 0; background: #E6F4F3; border-left: 4px solid #008377CF; border-radius: 4px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 14px 18px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377cf; font-size: 14px; margin-bottom: 4px; text-transform: uppercase; letter-spacing: 0.03em;\"\u003eSystem Component\u003c\/div\u003e\n\u003cdiv style=\"font-size: 15px; color: #2b2b2b; line-height: 1.6;\"\u003eThis is a \u003cstrong\u003eradial (semi-rigid) duct\u003c\/strong\u003e, not flexible insulated hose. It requires manifold\/distribution boxes, plenums, flanges, lock rings and sealing rings (sold separately) to complete a working system.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable role=\"presentation\" width=\"100%\" cellpadding=\"0\" cellspacing=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"50%\" style=\"padding-right: 10px; vertical-align: top; padding-bottom: 12px;\"\u003e\n\u003ctable role=\"presentation\" width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"background: #F7FAFA; border: 1px solid #D9EDEA; border-radius: 6px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 16px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #00625d; font-size: 15px; margin-bottom: 6px;\"\u003eAntimicrobial \u0026amp; Antistatic Inner Bore\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #2b2b2b; line-height: 1.6;\"\u003eThe smooth inner layer is enriched with a \u003cstrong\u003ehighly effective antistatic and antimicrobial additive\u003c\/strong\u003e that significantly reduces surface electrostatic tension, minimising the attraction and build-up of dust particles along the duct walls over the system's lifetime.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/td\u003e\n\u003ctd width=\"50%\" style=\"vertical-align: top; padding-bottom: 12px;\"\u003e\n\u003ctable role=\"presentation\" width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"background: #F7FAFA; border: 1px solid #D9EDEA; border-radius: 6px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 16px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #00625d; font-size: 15px; margin-bottom: 6px;\"\u003eCorrugated Outer Layer\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #2b2b2b; line-height: 1.6;\"\u003eThe \u003cstrong\u003edual-layer HDPE construction\u003c\/strong\u003e gives the duct excellent mechanical strength and resistance to deformation, allowing it to withstand demanding operating conditions while remaining easy to handle and install.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"50%\" style=\"padding-right: 10px; vertical-align: top; padding-bottom: 12px;\"\u003e\n\u003ctable role=\"presentation\" width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"background: #F7FAFA; border: 1px solid #D9EDEA; border-radius: 6px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 16px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #00625d; font-size: 15px; margin-bottom: 6px;\"\u003e290mm Bending Radius\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #2b2b2b; line-height: 1.6;\"\u003eA defined \u003cstrong\u003e290mm bending radius\u003c\/strong\u003e lets the duct form gradual bends through joists and service voids without kinking or restricting the internal bore, helping maintain consistent airflow through the run.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/td\u003e\n\u003ctd width=\"50%\" style=\"vertical-align: top; padding-bottom: 12px;\"\u003e\n\u003ctable role=\"presentation\" width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"background: #F7FAFA; border: 1px solid #D9EDEA; border-radius: 6px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 16px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #00625d; font-size: 15px; margin-bottom: 6px;\"\u003e394N Compression Strength\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #2b2b2b; line-height: 1.6;\"\u003eRated to \u003cstrong\u003e394N compression strength\u003c\/strong\u003e, the 75mm duct resists crushing and deformation during installation and once built into the fabric of the building.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"50%\" style=\"padding-right: 10px; vertical-align: top; padding-bottom: 12px;\"\u003e\n\u003ctable role=\"presentation\" width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"background: #F7FAFA; border: 1px solid #D9EDEA; border-radius: 6px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 16px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #00625d; font-size: 15px; margin-bottom: 6px;\"\u003eWide Service Temperature Range\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #2b2b2b; line-height: 1.6;\"\u003eRated from \u003cstrong\u003e-25°C to +90°C\u003c\/strong\u003e, the duct is suited to the temperature range typically encountered in loft voids, external walls, and ducted MVHR\/MEV supply and extract runs.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/td\u003e\n\u003ctd width=\"50%\" style=\"vertical-align: top; padding-bottom: 12px;\"\u003e\n\u003ctable role=\"presentation\" width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"background: #F7FAFA; border: 1px solid #D9EDEA; border-radius: 6px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 16px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #00625d; font-size: 15px; margin-bottom: 6px;\"\u003eWide Mounting Flexibility\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #2b2b2b; line-height: 1.6;\"\u003eUnlike round flexible duct that is typically limited to ceiling or wall runs, this semi-rigid profile is \u003cstrong\u003esuitable for ceiling, floor, or wall mounting\u003c\/strong\u003e, giving installers more routing options through a building's fabric.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable role=\"presentation\" width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"margin: 18px 0; background: #E6F4F3; border-left: 4px solid #008377CF; border-radius: 4px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 14px 18px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377cf; font-size: 14px; margin-bottom: 4px; text-transform: uppercase; letter-spacing: 0.03em;\"\u003eCompatible System Accessories\u003c\/div\u003e\n\u003cdiv style=\"font-size: 15px; color: #2b2b2b; line-height: 1.6;\"\u003eThis duct connects to \u003cstrong\u003emanifold boxes, plenums, round flanges, lock rings and sealing rings\u003c\/strong\u003e to form a complete radial system. These components are sold separately — check compatible accessories before ordering.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable role=\"presentation\" width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"border-collapse: collapse; margin: 20px 0; border: 1px solid #E0E0E0; border-radius: 6px; overflow: hidden;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\" style=\"background: #008377CF; color: #fff; font-weight: bold; padding: 9px 14px; font-size: 13px; letter-spacing: 0.05em; text-transform: uppercase;\"\u003eProduct Overview\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #F0F9F8; padding: 9px 14px; font-weight: 600; color: #333; font-size: 14px; width: 46%; border-bottom: 1px solid #E0E0E0;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"background: #F0F9F8; padding: 9px 14px; color: #222; font-size: 14px; border-bottom: 1px solid #E0E0E0;\"\u003eCasavent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #FFFFFF; padding: 9px 14px; font-weight: 600; color: #333; font-size: 14px; width: 46%; border-bottom: 1px solid #E0E0E0;\"\u003eProduct Code\u003c\/td\u003e\n\u003ctd style=\"background: #FFFFFF; padding: 9px 14px; color: #222; font-size: 14px; border-bottom: 1px solid #E0E0E0;\"\u003eSRD-75-50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #F0F9F8; padding: 9px 14px; font-weight: 600; color: #333; font-size: 14px; width: 46%; border-bottom: 1px solid #E0E0E0;\"\u003eDescription\u003c\/td\u003e\n\u003ctd style=\"background: #F0F9F8; padding: 9px 14px; color: #222; font-size: 14px; border-bottom: 1px solid #E0E0E0;\"\u003eRadial Semi-Rigid Ducting, Anti-Microbial \u0026amp; Anti-Static, 75mm x 50m Coil\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #FFFFFF; padding: 9px 14px; font-weight: 600; color: #333; font-size: 14px; width: 46%; border-bottom: 1px solid #E0E0E0;\"\u003eMaterial\u003c\/td\u003e\n\u003ctd style=\"background: #FFFFFF; padding: 9px 14px; color: #222; font-size: 14px; border-bottom: 1px solid #E0E0E0;\"\u003eHDPE (high-density polyethylene)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #F0F9F8; padding: 9px 14px; font-weight: 600; color: #333; font-size: 14px; width: 46%; border-bottom: 1px solid #E0E0E0;\"\u003eConstruction\u003c\/td\u003e\n\u003ctd style=\"background: #F0F9F8; padding: 9px 14px; color: #222; font-size: 14px; border-bottom: 1px solid #E0E0E0;\"\u003eDual-layer: corrugated outer \/ smooth antimicrobial \u0026amp; antistatic inner bore\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\" style=\"background: #008377CF; color: #fff; font-weight: bold; padding: 9px 14px; font-size: 13px; letter-spacing: 0.05em; text-transform: uppercase;\"\u003eDimensions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #F0F9F8; padding: 9px 14px; font-weight: 600; color: #333; font-size: 14px; width: 46%; border-bottom: 1px solid #E0E0E0;\"\u003eOutside Diameter (D)\u003c\/td\u003e\n\u003ctd style=\"background: #F0F9F8; padding: 9px 14px; color: #222; font-size: 14px; border-bottom: 1px solid #E0E0E0;\"\u003e75mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #FFFFFF; padding: 9px 14px; font-weight: 600; color: #333; font-size: 14px; width: 46%; border-bottom: 1px solid #E0E0E0;\"\u003eInternal Diameter (D)\u003c\/td\u003e\n\u003ctd style=\"background: #FFFFFF; padding: 9px 14px; color: #222; font-size: 14px; border-bottom: 1px solid #E0E0E0;\"\u003e60mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #F0F9F8; padding: 9px 14px; font-weight: 600; color: #333; font-size: 14px; width: 46%; border-bottom: 1px solid #E0E0E0;\"\u003eCoil Length (L)\u003c\/td\u003e\n\u003ctd style=\"background: #F0F9F8; padding: 9px 14px; color: #222; font-size: 14px; border-bottom: 1px solid #E0E0E0;\"\u003e50m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #FFFFFF; padding: 9px 14px; font-weight: 600; color: #333; font-size: 14px; width: 46%; border-bottom: 1px solid #E0E0E0;\"\u003eCoil Dimensions\u003c\/td\u003e\n\u003ctd style=\"background: #FFFFFF; padding: 9px 14px; color: #222; font-size: 14px; border-bottom: 1px solid #E0E0E0;\"\u003e1100 x 1100 x 40mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #F0F9F8; padding: 9px 14px; font-weight: 600; color: #333; font-size: 14px; width: 46%; border-bottom: 1px solid #E0E0E0;\"\u003eBending Radius\u003c\/td\u003e\n\u003ctd style=\"background: #F0F9F8; padding: 9px 14px; color: #222; font-size: 14px; border-bottom: 1px solid #E0E0E0;\"\u003e290mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\" style=\"background: #008377CF; color: #fff; font-weight: bold; padding: 9px 14px; font-size: 13px; letter-spacing: 0.05em; text-transform: uppercase;\"\u003ePerformance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #F0F9F8; padding: 9px 14px; font-weight: 600; color: #333; font-size: 14px; width: 46%; border-bottom: 1px solid #E0E0E0;\"\u003eCompression Strength\u003c\/td\u003e\n\u003ctd style=\"background: #F0F9F8; padding: 9px 14px; color: #222; font-size: 14px; border-bottom: 1px solid #E0E0E0;\"\u003e394N\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #FFFFFF; padding: 9px 14px; font-weight: 600; color: #333; font-size: 14px; width: 46%; border-bottom: 1px solid #E0E0E0;\"\u003eService Temperature\u003c\/td\u003e\n\u003ctd style=\"background: #FFFFFF; padding: 9px 14px; color: #222; font-size: 14px; border-bottom: 1px solid #E0E0E0;\"\u003e-25°C to +90°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #F0F9F8; padding: 9px 14px; font-weight: 600; color: #333; font-size: 14px; width: 46%; border-bottom: 1px solid #E0E0E0;\"\u003ePressure Difference at ~50 m³\/h\u003c\/td\u003e\n\u003ctd style=\"background: #F0F9F8; padding: 9px 14px; color: #222; font-size: 14px; border-bottom: 1px solid #E0E0E0;\"\u003eApprox. 7 Pa (see manufacturer airflow\/pressure chart)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\" style=\"background: #008377CF; color: #fff; font-weight: bold; padding: 9px 14px; font-size: 13px; letter-spacing: 0.05em; text-transform: uppercase;\"\u003eApplication\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #F0F9F8; padding: 9px 14px; font-weight: 600; color: #333; font-size: 14px; width: 46%; border-bottom: 1px solid #E0E0E0;\"\u003eUse\u003c\/td\u003e\n\u003ctd style=\"background: #F0F9F8; padding: 9px 14px; color: #222; font-size: 14px; border-bottom: 1px solid #E0E0E0;\"\u003eSupply and exhaust ductwork for radial MVHR\/MEV systems in residential premises\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #FFFFFF; padding: 9px 14px; font-weight: 600; color: #333; font-size: 14px; width: 46%; border-bottom: 1px solid #E0E0E0;\"\u003eInstallation\u003c\/td\u003e\n\u003ctd style=\"background: #FFFFFF; padding: 9px 14px; color: #222; font-size: 14px; border-bottom: 1px solid #E0E0E0;\"\u003eCeiling, floor, or wall mounted; suspended ceilings and ceiling voids\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #F0F9F8; padding: 9px 14px; font-weight: 600; color: #333; font-size: 14px; width: 46%; border-bottom: 1px solid #E0E0E0;\"\u003eCompatible Fittings\u003c\/td\u003e\n\u003ctd style=\"background: #F0F9F8; padding: 9px 14px; color: #222; font-size: 14px; border-bottom: 1px solid #E0E0E0;\"\u003e75mm round flanges, lock rings, sealing rings, manifold\/distribution boxes, plenums, coupling sleeves\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable role=\"presentation\" width=\"100%\" cellpadding=\"0\" cellspacing=\"0\" style=\"margin: 18px 0; background: #FFF6E5; border-left: 4px solid #E0942A; border-radius: 4px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 14px 18px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #e0942a; font-size: 14px; margin-bottom: 4px; text-transform: uppercase; letter-spacing: 0.03em;\"\u003eAirflow \u0026amp; Pressure Performance\u003c\/div\u003e\n\u003cdiv style=\"font-size: 15px; color: #2b2b2b; line-height: 1.6;\"\u003ePressure difference across the duct rises with airflow rate, as shown on the manufacturer's performance chart — at low-to-moderate flows the 75mm duct maintains a low pressure drop, which increases progressively as airflow approaches 50 m³\/h. Refer to the full chart for intermediate values when sizing a system.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv style=\"border: 1px solid #D9EDEA; border-radius: 8px; margin-bottom: 10px; overflow: hidden;\"\u003e\n\u003cdetails\u003e\n\u003csummary style=\"padding: 14px 18px; font-size: 15px; font-weight: bold; color: #00625d; cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between; background: #E6F4F3;\"\u003e\u003cspan\u003eWhat is the internal diameter of the 75mm duct?\u003c\/span\u003e\u003csvg width=\"18\" height=\"18\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 18px 16px; font-size: 15px; color: #2b2b2b; line-height: 1.65; border-top: 1px solid #D9EDEA; background: #fff;\"\u003eThe outside diameter is 75mm, with an internal bore diameter of 60mm.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #D9EDEA; border-radius: 8px; margin-bottom: 10px; overflow: hidden;\"\u003e\n\u003cdetails\u003e\n\u003csummary style=\"padding: 14px 18px; font-size: 15px; font-weight: bold; color: #00625d; cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between; background: #E6F4F3;\"\u003e\u003cspan\u003eWhat is the bending radius for this duct?\u003c\/span\u003e\u003csvg width=\"18\" height=\"18\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 18px 16px; font-size: 15px; color: #2b2b2b; line-height: 1.65; border-top: 1px solid #D9EDEA; background: #fff;\"\u003eThe bending radius for the 75mm duct is \u003cstrong\u003e290mm\u003c\/strong\u003e. Bending tighter than this can restrict airflow and stress the duct wall.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #D9EDEA; border-radius: 8px; margin-bottom: 10px; overflow: hidden;\"\u003e\n\u003cdetails\u003e\n\u003csummary style=\"padding: 14px 18px; font-size: 15px; font-weight: bold; color: #00625d; cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between; background: #E6F4F3;\"\u003e\u003cspan\u003eWhat does the antimicrobial and antistatic lining do?\u003c\/span\u003e\u003csvg width=\"18\" height=\"18\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 18px 16px; font-size: 15px; color: #2b2b2b; line-height: 1.65; border-top: 1px solid #D9EDEA; background: #fff;\"\u003eThe inner bore is treated with an additive that reduces surface electrostatic tension, which in turn minimises the attraction and build-up of dust particles inside the duct over time — helping keep the system cleaner and airflow more consistent.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #D9EDEA; border-radius: 8px; margin-bottom: 10px; overflow: hidden;\"\u003e\n\u003cdetails\u003e\n\u003csummary style=\"padding: 14px 18px; font-size: 15px; font-weight: bold; color: #00625d; cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between; background: #E6F4F3;\"\u003e\u003cspan\u003eCan this duct be used for both supply and extract air?\u003c\/span\u003e\u003csvg width=\"18\" height=\"18\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 18px 16px; font-size: 15px; color: #2b2b2b; line-height: 1.65; border-top: 1px solid #D9EDEA; background: #fff;\"\u003eYes. This radial semi-rigid duct is suitable for both supply and exhaust\/extract runs in residential MVHR and MEV systems.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #D9EDEA; border-radius: 8px; margin-bottom: 10px; overflow: hidden;\"\u003e\n\u003cdetails\u003e\n\u003csummary style=\"padding: 14px 18px; font-size: 15px; font-weight: bold; color: #00625d; cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between; background: #E6F4F3;\"\u003e\u003cspan\u003eWhat accessories do I need to complete a system with this duct?\u003c\/span\u003e\u003csvg width=\"18\" height=\"18\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 18px 16px; font-size: 15px; color: #2b2b2b; line-height: 1.65; border-top: 1px solid #D9EDEA; background: #fff;\"\u003eA complete radial run typically needs a manifold or distribution box at the central end, a plenum or round flange with lock ring at the room end, and a sealing ring for an airtight connection. These are sold separately.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #D9EDEA; border-radius: 8px; margin-bottom: 10px; overflow: hidden;\"\u003e\n\u003cdetails\u003e\n\u003csummary style=\"padding: 14px 18px; font-size: 15px; font-weight: bold; color: #00625d; cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between; background: #E6F4F3;\"\u003e\u003cspan\u003eWhat temperature range is the duct rated for?\u003c\/span\u003e\u003csvg width=\"18\" height=\"18\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 18px 16px; font-size: 15px; color: #2b2b2b; line-height: 1.65; border-top: 1px solid #D9EDEA; background: #fff;\"\u003eThe duct has a service temperature range of \u003cstrong\u003e-25°C to +90°C\u003c\/strong\u003e, suitable for typical loft void, wall, and ducted MVHR\/MEV installation conditions.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Casavent","offers":[{"title":"Default Title","offer_id":65607775322461,"sku":"SRD-75-50","price":199.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/75mmx50mSemiRigidRadialMVHRDuctingHoseAntiBacterial_Static.jpg?v=1787059040","url":"https:\/\/qualityheating.co.uk\/products\/radial-semi-rigid-ducting-75mm-x-50m-coil-mvhr-antibacterial-antistatic-duct","provider":"AIZO Quality Heating","version":"1.0","type":"link"}