{"product_id":"spigot-silencer","title":"Elta Spigot Silencer","description":"\u003cdiv class=\"product-description\"\u003e\n\u003ch2\u003eSpigot Silencer\u003c\/h2\u003e\n\u003cp\u003eThe Elta Spigot Silencer is a compact circular duct attenuator with a spigot connection, designed to reduce duct borne noise on smaller ventilation systems. It is particularly useful where you need cross talk reduction between rooms, plus a simple connection into flexible ducting or spiral ducting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSelect models available for next day delivery.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eWhere it fits best\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmall fans and compact duct runs:\u003c\/strong\u003e a small metric range designed with space conscious installs in mind\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCross talk control:\u003c\/strong\u003e helps reduce noise transfer through shared duct routes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible and spiral ducting:\u003c\/strong\u003e spigot ends make connection straightforward\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eConstruction\u003c\/h3\u003e\n\u003cp\u003eRigid galvanised sheet steel casing with a highly absorbent sound attenuating lining between the outer casing and an inner perforated steel lining. Instead of threaded fixing holes on the end faces, the silencer uses a steel spigot for easier mounting into ductwork.\u003c\/p\u003e\n\u003ch3\u003eKitchen extract option\u003c\/h3\u003e\n\u003cp\u003eFor kitchen extract applications, Melinex lined silencers must be used to prevent grease impregnation into the acoustic media, as prescribed in DW\/172 HVAC Specification For Kitchen Ventilation Systems.\u003c\/p\u003e\n\u003ch3\u003eSizes and lengths\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard spigot diameters:\u003c\/strong\u003e Ø100 to Ø500\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLengths available:\u003c\/strong\u003e 300mm, 600mm, 900mm, 1200mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarger sizes:\u003c\/strong\u003e for Ø560 to Ø710 please contact Elta\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eUnderstanding silencer performance\u003c\/h3\u003e\n\u003cp\u003eSilencer attenuation is stated as dynamic insertion loss. To estimate the sound level of a fan fitted with a silencer, subtract the dynamic insertion loss values from the fan sound power level spectrum (dBW) across the full octave band mid frequency range. Achieved attenuation varies with air velocity and flow pattern and noise regeneration can occur at higher velocities, especially in EP silencers.\u003c\/p\u003e\n\u003ch3\u003eSelection tip\u003c\/h3\u003e\n\u003cp\u003eChoose the spigot diameter to match the duct first, then select the length based on the level of attenuation required and the space available. For kitchen extract, specify the Melinex lined option. Where circular silencers cannot achieve the required attenuation in noise sensitive areas, splitter silencers can be designed as an alternative.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-description\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0648\/4597\/1631\/files\/download-datasheets-banner.png?v=1760521797\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ctable style=\"width: 100%;\" width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 20.4379%;\"\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0648\/4597\/1631\/files\/Spigot-Silencer.pdf?v=1770637486\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0648\/4597\/1631\/files\/pdf-download-icon.png?v=1760521798\" alt=\"\"\u003e\u003c\/a\u003e\u003ca title=\"ODE Starflex Loft Roll (100mm \u0026amp; 200mm)\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0648\/4151\/5237\/files\/Acoustic_Mat_1.pdf?v=1709633062\"\u003e\u003c\/a\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0648\/4151\/5237\/files\/epd-certificate-glasswool-44_1.pdf?v=1709632546\" title=\"Lunaflex Ductwrap Data Sheet\"\u003e\u003c\/a\u003e\u003ca rel=\"noopener\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0648\/4151\/5237\/files\/ODE_Duct-wrap_Datasheet.pdf?v=1709630634\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 78.1023%;\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong data-end=\"3172\" data-start=\"3121\"\u003eProduct Data, Performance \u0026amp; Dimension Sheet\u003c\/strong\u003e\u003cbr data-end=\"3175\" data-start=\"3172\"\u003eDynamic insertion loss tables across octave bands, plus dimensional data, weights and product codes for the Spigot Silencer range. Includes spigot diameter coverage, available lengths and the Melinex lining note for kitchen extract applications. Click here to download the spigot silencer data sheet. \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0648\/4597\/1631\/files\/Spigot-Silencer.pdf?v=1770637486\"\u003e\u003cstrong\u003eClick here to download the full data, performance and dimension sheet.\u003c\/strong\u003e\u003c\/a\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cbr\u003eLooking to specify or purchase?\u003c\/strong\u003e \u003ca href=\"https:\/\/buyventilation.co.uk\/collections\/heat-recovery-units\"\u003e\u003cstrong\u003eExplore our full range of heat recovery ventilation units\u003c\/strong\u003e\u003c\/a\u003e or contact Buy Ventilation for expert guidance on selecting the right system for your project.\u003c\/p\u003e\n\u003cp\u003e\u003c!-- Sources: :contentReference[oaicite:0]{index=0} --\u003e\u003c\/p\u003e","brand":"BuyVentilation","offers":[{"title":"100mm \/ 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