{"product_id":"air-valve-plenum-box-125mm-valve-x-2-spigot-75mm-epp","title":"Air Valve Plenum Box, 125mm Valve x 2 Spigot 75mm EPP","description":"\u003c!-- SEO Product Name: Casavent AVA-125-75-2-V-EPP Air Valve Plenum Box, 125mm Valve x 2 Spigot 75mm EPP --\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 AVA-125-75-2-V-EPP\u003c\/strong\u003e is an EPP air valve plenum box that connects a single \u003cstrong\u003e125mm ceiling or wall air valve\u003c\/strong\u003e to \u003cstrong\u003etwo 75mm radial semi-rigid ducts\u003c\/strong\u003e, forming the room-end termination of a radial MVHR or MEV system. Moulded from \u003cstrong\u003eExpanded Polypropylene (EPP)\u003c\/strong\u003e, the box combines an insulating, lightweight structure with an aerodynamically profiled interior that keeps pressure drop low as air splits between the two duct spigots.\u003c\/p\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.7; color: #2b2b2b; margin: 0 0 16px 0;\"\u003eThis vertical-spigot plenum sits between the air valve and the radial ductwork, allowing higher airflow rooms to be served by two 75mm ducts from a single valve position rather than one larger, harder-to-route duct.\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;\"\u003e125mm\u003c\/div\u003e\n\u003cdiv style=\"font-size: 11px; font-weight: 400; color: #fff; margin-top: 4px; opacity: 0.95;\"\u003eAir Valve Neck\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;\"\u003e2 x 75mm\u003c\/div\u003e\n\u003cdiv style=\"font-size: 11px; font-weight: 400; color: #fff; margin-top: 4px; opacity: 0.95;\"\u003eDuct Spigots\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;\"\u003eEPP\u003c\/div\u003e\n\u003cdiv style=\"font-size: 11px; font-weight: 400; color: #fff; margin-top: 4px; opacity: 0.95;\"\u003eMaterial\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;\"\u003e217.5mm\u003c\/div\u003e\n\u003cdiv style=\"font-size: 11px; font-weight: 400; color: #fff; margin-top: 4px; opacity: 0.95;\"\u003eLength (A)\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;\"\u003eλ 0.0038\u003c\/div\u003e\n\u003cdiv style=\"font-size: 11px; font-weight: 400; color: #fff; margin-top: 4px; opacity: 0.95;\"\u003eThermal Conductivity\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 to +80°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 plenum box is a \u003cstrong\u003esystem component\u003c\/strong\u003e — it connects a 125mm air valve to 75mm radial ductwork and does not include the valve, ducting, or manifold. These are sold separately.\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;\"\u003eInsulating EPP Construction\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #2b2b2b; line-height: 1.6;\"\u003eMoulded from \u003cstrong\u003eExpanded Polypropylene\u003c\/strong\u003e with a wall thickness of approximately 8–31mm, the box provides useful thermal insulation (λ = 0.0038 W\/(m·K)) around the duct connection, reducing condensation risk and heat loss at the room termination point.\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;\"\u003eAerodynamic Internal Profile\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #2b2b2b; line-height: 1.6;\"\u003eThe \u003cstrong\u003eprofiled internal shape\u003c\/strong\u003e of the EPP box reduces pressure drop compared with a plain rectangular box, helping the connected duct run operate at a lower system pressure for the same airflow.\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;\"\u003eDual 75mm Duct Spigots\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #2b2b2b; line-height: 1.6;\"\u003eTwo \u003cstrong\u003e75mm duct connection spigots\u003c\/strong\u003e allow a single air valve position to be fed by two duct runs, useful where higher airflow is required at that valve than a single 75mm duct can comfortably deliver.\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;\"\u003eDouble Duct Fixing\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #2b2b2b; line-height: 1.6;\"\u003eEach duct spigot uses a \u003cstrong\u003emale connection with an internal gasket and EPP outer casing\u003c\/strong\u003e, giving a secure, airtight double-fixing method for the semi-rigid duct.\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;\"\u003eCorrosion-Free\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #2b2b2b; line-height: 1.6;\"\u003eAs a moulded plastic component, the plenum box is \u003cstrong\u003eimmune to corrosion\u003c\/strong\u003e, unlike galvanised steel alternatives, giving long service life in damp loft or ceiling void conditions.\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;\"\u003eFlexible Fixing Options\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #2b2b2b; line-height: 1.6;\"\u003eThe box can be installed using \u003cstrong\u003escrews and wall plugs\u003c\/strong\u003e, or with 17–25mm-wide perforated mounting tape, giving installers flexibility depending on the fixing surface available.\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=\"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;\"\u003eAVA-125-75-2-V-EPP\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;\"\u003eAir Valve Plenum Box, 125mm Valve x 2 Spigot 75mm, Vertical, EPP\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;\"\u003eOrientation\u003c\/td\u003e\n\u003ctd style=\"background: #FFFFFF; padding: 9px 14px; color: #222; font-size: 14px; border-bottom: 1px solid #E0E0E0;\"\u003eVertical\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;\"\u003eAir Valve Neck Diameter\u003c\/td\u003e\n\u003ctd style=\"background: #F0F9F8; padding: 9px 14px; color: #222; font-size: 14px; border-bottom: 1px solid #E0E0E0;\"\u003e125mm\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;\"\u003eDuct Spigot Diameter\u003c\/td\u003e\n\u003ctd style=\"background: #FFFFFF; padding: 9px 14px; color: #222; font-size: 14px; border-bottom: 1px solid #E0E0E0;\"\u003e75mm (x2)\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;\"\u003eLength (A)\u003c\/td\u003e\n\u003ctd style=\"background: #F0F9F8; padding: 9px 14px; color: #222; font-size: 14px; border-bottom: 1px solid #E0E0E0;\"\u003e217.5mm\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;\"\u003eWidth (B)\u003c\/td\u003e\n\u003ctd style=\"background: #FFFFFF; padding: 9px 14px; color: #222; font-size: 14px; border-bottom: 1px solid #E0E0E0;\"\u003e219mm\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;\"\u003eHeight (C)\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;\"\u003eSpigot Length (L)\u003c\/td\u003e\n\u003ctd style=\"background: #FFFFFF; padding: 9px 14px; color: #222; font-size: 14px; border-bottom: 1px solid #E0E0E0;\"\u003e80mm\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;\"\u003eTechnical Data\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;\"\u003eMaterial\u003c\/td\u003e\n\u003ctd style=\"background: #F0F9F8; padding: 9px 14px; color: #222; font-size: 14px; border-bottom: 1px solid #E0E0E0;\"\u003eExpanded Polypropylene (EPP)\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;\"\u003eThermal Conductivity\u003c\/td\u003e\n\u003ctd style=\"background: #FFFFFF; padding: 9px 14px; color: #222; font-size: 14px; border-bottom: 1px solid #E0E0E0;\"\u003eλ = 0.0038 W\/(m·K)\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;\"\u003eService Temperature\u003c\/td\u003e\n\u003ctd style=\"background: #F0F9F8; padding: 9px 14px; color: #222; font-size: 14px; border-bottom: 1px solid #E0E0E0;\"\u003e-25°C to +80°C\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;\"\u003eReaction to Fire\u003c\/td\u003e\n\u003ctd style=\"background: #FFFFFF; padding: 9px 14px; color: #222; font-size: 14px; border-bottom: 1px solid #E0E0E0;\"\u003eClass E (EN 13501-1)\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;\"\u003eMicrobial Resistance\u003c\/td\u003e\n\u003ctd style=\"background: #F0F9F8; padding: 9px 14px; color: #222; font-size: 14px; border-bottom: 1px solid #E0E0E0;\"\u003eRating 1a, Method A (EN ISO 846:2019)\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;\"\u003eAir-Tightness\u003c\/td\u003e\n\u003ctd style=\"background: #FFFFFF; padding: 9px 14px; color: #222; font-size: 14px; border-bottom: 1px solid #E0E0E0;\"\u003eSuitable for ATC2 (D) air-tightness class systems (EN 17192:2018)\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 does this plenum box connect?\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;\"\u003eIt connects a single 125mm ceiling or wall air valve to two 75mm radial semi-rigid ducts, terminating a radial MVHR\/MEV run at the room.\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\u003eWhy does it have two duct spigots instead of one?\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;\"\u003eSplitting the airflow across two 75mm ducts allows higher air volumes to be delivered to a single valve position than a single 75mm duct comfortably supports.\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 box made from and why?\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;\"\u003eIt is moulded from Expanded Polypropylene (EPP), which is lightweight, insulating, corrosion-free, and has good acoustic properties compared with metal alternatives.\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\u003eHow is it fixed in place?\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;\"\u003eUsing either screws and wall plugs, or 17–25mm-wide perforated mounting tape.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Casavent","offers":[{"title":"Default Title","offer_id":65612040044893,"sku":"AVA-125-75-2-V-EPP","price":47.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/AirValvePlenumBox_125mmValvex2Spigot75mmEPP.png?v=1787069370","url":"https:\/\/qualityheating.co.uk\/products\/air-valve-plenum-box-125mm-valve-x-2-spigot-75mm-epp","provider":"AIZO Quality Heating","version":"1.0","type":"link"}