{"id":1727,"date":"2026-07-29T10:14:50","date_gmt":"2026-07-29T09:14:50","guid":{"rendered":"https:\/\/www.jprservices.co.uk\/products\/?post_type=product&p=1727"},"modified":"2026-07-29T15:32:04","modified_gmt":"2026-07-29T14:32:04","slug":"fixed-helical-swirl-diffuser-hsc-fd","status":"publish","type":"product","link":"https:\/\/www.jprservices.co.uk\/products\/product\/fixed-helical-swirl-diffuser-hsc-fd\/","title":{"rendered":"Fixed Helical Swirl Diffuser HSC-FD"},"content":{"rendered":"
The SMARTEMP\u00ae Fixed Helical Swirl Diffuser, type HSC-FD, produces a highly inductive swirl discharge, distributing the supply air stream radially with a fixed horizontal discharge direction and strong mixing characteristics throughout the space. The patent-pending design provides high levels of draught-free comfort and is suitable for both constant volume and Variable Air Volume (VAV) applications, including low-temperature and cold air supply systems.<\/div>\n
\n
\n
\n
\n
\n
\n
\n
\n

The diffuser is capable of operating with supply-to-room temperature differentials of up to -16 K, including airflow turndown to approximately 25%, while maintaining effective air distribution and occupant comfort.<\/p>\n

The HSC-FD is supplied as standard with a square diffuser face (Figure 1) and is also available with an optional round face configuration.<\/p>\n

The diffuser incorporates twenty offset radial vanes with cambered leading edges, reducing both sound power levels and pressure drop. This improves acoustic comfort while also reducing fan energy consumption.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

\"Click<\/a><\/p>\n[wpforms id=\"55\"]\n","protected":false},"featured_media":1719,"template":"","meta":[],"product_brand":[],"product_cat":[78],"product_tag":[],"class_list":["post-1727","product","type-product","status-publish","has-post-thumbnail","product_cat-smartemp-products","first","instock","shipping-taxable","product-type-simple"],"yoast_head":"\nFixed Helical Swirl Diffuser HSC-FD | JPR Services<\/title>\n<meta name=\"description\" content=\"The SMARTEMP\u00ae Fixed Helical Swirl Diffuser, type HSC-FD, produces a highly inductive swirl discharge, distributing the supply air stream radially with a fixed horizontal discharge direction and strong mixing characteristics throughout the space. The patent-pending design provides high levels of draught-free comfort and is suitable for both constant volume and Variable Air Volume (VAV) applications, including low-temperature and cold air supply systems.The diffuser is capable of operating with supply-to-room temperature differentials of up to -16 K, including airflow turndown to approximately 25%, while maintaining effective air distribution and occupant comfort.The HSC-FD is supplied as standard with a square diffuser face (Figure 1) and is also available with an optional round face configuration.The diffuser incorporates twenty offset radial vanes with cambered leading edges, reducing both sound power levels and pressure drop. This improves acoustic comfort while also reducing fan energy consumption.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.jprservices.co.uk\/products\/product\/fixed-helical-swirl-diffuser-hsc-fd\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Fixed Helical Swirl Diffuser HSC-FD | JPR Services\" \/>\n<meta property=\"og:description\" content=\"The SMARTEMP\u00ae Fixed Helical Swirl Diffuser, type HSC-FD, produces a highly inductive swirl discharge, distributing the supply air stream radially with a fixed horizontal discharge direction and strong mixing characteristics throughout the space. The patent-pending design provides high levels of draught-free comfort and is suitable for both constant volume and Variable Air Volume (VAV) applications, including low-temperature and cold air supply systems.The diffuser is capable of operating with supply-to-room temperature differentials of up to -16 K, including airflow turndown to approximately 25%, while maintaining effective air distribution and occupant comfort.The HSC-FD is supplied as standard with a square diffuser face (Figure 1) and is also available with an optional round face configuration.The diffuser incorporates twenty offset radial vanes with cambered leading edges, reducing both sound power levels and pressure drop. This improves acoustic comfort while also reducing fan energy consumption.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.jprservices.co.uk\/products\/product\/fixed-helical-swirl-diffuser-hsc-fd\/\" \/>\n<meta property=\"og:site_name\" content=\"JPR Services\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/jprservices.co.uk\" \/>\n<meta property=\"article:modified_time\" content=\"2026-07-29T14:32:04+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.jprservices.co.uk\/wp-content\/uploads\/2021\/11\/HSC-FD.png\" \/>\n\t<meta property=\"og:image:width\" content=\"812\" \/>\n\t<meta property=\"og:image:height\" content=\"812\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.jprservices.co.uk\\\/products\\\/product\\\/fixed-helical-swirl-diffuser-hsc-fd\\\/\",\"url\":\"https:\\\/\\\/www.jprservices.co.uk\\\/products\\\/product\\\/fixed-helical-swirl-diffuser-hsc-fd\\\/\",\"name\":\"Fixed Helical Swirl Diffuser HSC-FD | JPR Services\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.jprservices.co.uk\\\/products\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.jprservices.co.uk\\\/products\\\/product\\\/fixed-helical-swirl-diffuser-hsc-fd\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.jprservices.co.uk\\\/products\\\/product\\\/fixed-helical-swirl-diffuser-hsc-fd\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.jprservices.co.uk\\\/wp-content\\\/uploads\\\/2021\\\/11\\\/HSC-FD.png\",\"datePublished\":\"2026-07-29T09:14:50+00:00\",\"dateModified\":\"2026-07-29T14:32:04+00:00\",\"description\":\"The SMARTEMP\u00ae Fixed Helical Swirl Diffuser, type HSC-FD, produces a highly inductive swirl discharge, distributing the supply air stream radially with a fixed horizontal discharge direction and strong mixing characteristics throughout the space. The patent-pending design provides high levels of draught-free comfort and is suitable for both constant volume and Variable Air Volume (VAV) applications, including low-temperature and cold air supply systems.The diffuser is capable of operating with supply-to-room temperature differentials of up to -16 K, including airflow turndown to approximately 25%, while maintaining effective air distribution and occupant comfort.The HSC-FD is supplied as standard with a square diffuser face (Figure 1) and is also available with an optional round face configuration.The diffuser incorporates twenty offset radial vanes with cambered leading edges, reducing both sound power levels and pressure drop. This improves acoustic comfort while also reducing fan energy consumption.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.jprservices.co.uk\\\/products\\\/product\\\/fixed-helical-swirl-diffuser-hsc-fd\\\/#breadcrumb\"},\"inLanguage\":\"en-GB\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.jprservices.co.uk\\\/products\\\/product\\\/fixed-helical-swirl-diffuser-hsc-fd\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-GB\",\"@id\":\"https:\\\/\\\/www.jprservices.co.uk\\\/products\\\/product\\\/fixed-helical-swirl-diffuser-hsc-fd\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.jprservices.co.uk\\\/wp-content\\\/uploads\\\/2021\\\/11\\\/HSC-FD.png\",\"contentUrl\":\"https:\\\/\\\/www.jprservices.co.uk\\\/wp-content\\\/uploads\\\/2021\\\/11\\\/HSC-FD.png\",\"width\":812,\"height\":812},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.jprservices.co.uk\\\/products\\\/product\\\/fixed-helical-swirl-diffuser-hsc-fd\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.jprservices.co.uk\\\/products\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Fixed Helical Swirl Diffuser HSC-FD\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.jprservices.co.uk\\\/products\\\/#website\",\"url\":\"https:\\\/\\\/www.jprservices.co.uk\\\/products\\\/\",\"name\":\"JPR Services\",\"description\":\"Grillles | Diffusers | Swirl Diffusers | Air Valves | Floor Grilles | Plastered in Products | Louvers\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.jprservices.co.uk\\\/products\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.jprservices.co.uk\\\/products\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-GB\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.jprservices.co.uk\\\/products\\\/#organization\",\"name\":\"JPR Services\",\"url\":\"https:\\\/\\\/www.jprservices.co.uk\\\/products\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-GB\",\"@id\":\"https:\\\/\\\/www.jprservices.co.uk\\\/products\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/i0.wp.com\\\/www.jprservices.co.uk\\\/wp-content\\\/uploads\\\/2021\\\/11\\\/cropped-favicon.png?fit=512%2C512&ssl=1\",\"contentUrl\":\"https:\\\/\\\/i0.wp.com\\\/www.jprservices.co.uk\\\/wp-content\\\/uploads\\\/2021\\\/11\\\/cropped-favicon.png?fit=512%2C512&ssl=1\",\"width\":512,\"height\":512,\"caption\":\"JPR Services\"},\"image\":{\"@id\":\"https:\\\/\\\/www.jprservices.co.uk\\\/products\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/jprservices.co.uk\",\"https:\\\/\\\/www.linkedin.com\\\/company\\\/jpr-services-welwyn-ltd\\\/\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Fixed Helical Swirl Diffuser HSC-FD | JPR Services","description":"The SMARTEMP\u00ae Fixed Helical Swirl Diffuser, type HSC-FD, produces a highly inductive swirl discharge, distributing the supply air stream radially with a fixed horizontal discharge direction and strong mixing characteristics throughout the space. The patent-pending design provides high levels of draught-free comfort and is suitable for both constant volume and Variable Air Volume (VAV) applications, including low-temperature and cold air supply systems.The diffuser is capable of operating with supply-to-room temperature differentials of up to -16 K, including airflow turndown to approximately 25%, while maintaining effective air distribution and occupant comfort.The HSC-FD is supplied as standard with a square diffuser face (Figure 1) and is also available with an optional round face configuration.The diffuser incorporates twenty offset radial vanes with cambered leading edges, reducing both sound power levels and pressure drop. This improves acoustic comfort while also reducing fan energy consumption.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.jprservices.co.uk\/products\/product\/fixed-helical-swirl-diffuser-hsc-fd\/","og_locale":"en_GB","og_type":"article","og_title":"Fixed Helical Swirl Diffuser HSC-FD | JPR Services","og_description":"The SMARTEMP\u00ae Fixed Helical Swirl Diffuser, type HSC-FD, produces a highly inductive swirl discharge, distributing the supply air stream radially with a fixed horizontal discharge direction and strong mixing characteristics throughout the space. The patent-pending design provides high levels of draught-free comfort and is suitable for both constant volume and Variable Air Volume (VAV) applications, including low-temperature and cold air supply systems.The diffuser is capable of operating with supply-to-room temperature differentials of up to -16 K, including airflow turndown to approximately 25%, while maintaining effective air distribution and occupant comfort.The HSC-FD is supplied as standard with a square diffuser face (Figure 1) and is also available with an optional round face configuration.The diffuser incorporates twenty offset radial vanes with cambered leading edges, reducing both sound power levels and pressure drop. This improves acoustic comfort while also reducing fan energy consumption.","og_url":"https:\/\/www.jprservices.co.uk\/products\/product\/fixed-helical-swirl-diffuser-hsc-fd\/","og_site_name":"JPR Services","article_publisher":"https:\/\/www.facebook.com\/jprservices.co.uk","article_modified_time":"2026-07-29T14:32:04+00:00","og_image":[{"width":812,"height":812,"url":"https:\/\/www.jprservices.co.uk\/wp-content\/uploads\/2021\/11\/HSC-FD.png","type":"image\/png"}],"twitter_card":"summary_large_image","twitter_misc":{"Estimated reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.jprservices.co.uk\/products\/product\/fixed-helical-swirl-diffuser-hsc-fd\/","url":"https:\/\/www.jprservices.co.uk\/products\/product\/fixed-helical-swirl-diffuser-hsc-fd\/","name":"Fixed Helical Swirl Diffuser HSC-FD | JPR Services","isPartOf":{"@id":"https:\/\/www.jprservices.co.uk\/products\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.jprservices.co.uk\/products\/product\/fixed-helical-swirl-diffuser-hsc-fd\/#primaryimage"},"image":{"@id":"https:\/\/www.jprservices.co.uk\/products\/product\/fixed-helical-swirl-diffuser-hsc-fd\/#primaryimage"},"thumbnailUrl":"https:\/\/www.jprservices.co.uk\/wp-content\/uploads\/2021\/11\/HSC-FD.png","datePublished":"2026-07-29T09:14:50+00:00","dateModified":"2026-07-29T14:32:04+00:00","description":"The SMARTEMP\u00ae Fixed Helical Swirl Diffuser, type HSC-FD, produces a highly inductive swirl discharge, distributing the supply air stream radially with a fixed horizontal discharge direction and strong mixing characteristics throughout the space. The patent-pending design provides high levels of draught-free comfort and is suitable for both constant volume and Variable Air Volume (VAV) applications, including low-temperature and cold air supply systems.The diffuser is capable of operating with supply-to-room temperature differentials of up to -16 K, including airflow turndown to approximately 25%, while maintaining effective air distribution and occupant comfort.The HSC-FD is supplied as standard with a square diffuser face (Figure 1) and is also available with an optional round face configuration.The diffuser incorporates twenty offset radial vanes with cambered leading edges, reducing both sound power levels and pressure drop. This improves acoustic comfort while also reducing fan energy consumption.","breadcrumb":{"@id":"https:\/\/www.jprservices.co.uk\/products\/product\/fixed-helical-swirl-diffuser-hsc-fd\/#breadcrumb"},"inLanguage":"en-GB","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.jprservices.co.uk\/products\/product\/fixed-helical-swirl-diffuser-hsc-fd\/"]}]},{"@type":"ImageObject","inLanguage":"en-GB","@id":"https:\/\/www.jprservices.co.uk\/products\/product\/fixed-helical-swirl-diffuser-hsc-fd\/#primaryimage","url":"https:\/\/www.jprservices.co.uk\/wp-content\/uploads\/2021\/11\/HSC-FD.png","contentUrl":"https:\/\/www.jprservices.co.uk\/wp-content\/uploads\/2021\/11\/HSC-FD.png","width":812,"height":812},{"@type":"BreadcrumbList","@id":"https:\/\/www.jprservices.co.uk\/products\/product\/fixed-helical-swirl-diffuser-hsc-fd\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.jprservices.co.uk\/products\/"},{"@type":"ListItem","position":2,"name":"Fixed Helical Swirl Diffuser HSC-FD"}]},{"@type":"WebSite","@id":"https:\/\/www.jprservices.co.uk\/products\/#website","url":"https:\/\/www.jprservices.co.uk\/products\/","name":"JPR Services","description":"Grillles | Diffusers | Swirl Diffusers | Air Valves | Floor Grilles | Plastered in Products | Louvers","publisher":{"@id":"https:\/\/www.jprservices.co.uk\/products\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.jprservices.co.uk\/products\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-GB"},{"@type":"Organization","@id":"https:\/\/www.jprservices.co.uk\/products\/#organization","name":"JPR Services","url":"https:\/\/www.jprservices.co.uk\/products\/","logo":{"@type":"ImageObject","inLanguage":"en-GB","@id":"https:\/\/www.jprservices.co.uk\/products\/#\/schema\/logo\/image\/","url":"https:\/\/i0.wp.com\/www.jprservices.co.uk\/wp-content\/uploads\/2021\/11\/cropped-favicon.png?fit=512%2C512&ssl=1","contentUrl":"https:\/\/i0.wp.com\/www.jprservices.co.uk\/wp-content\/uploads\/2021\/11\/cropped-favicon.png?fit=512%2C512&ssl=1","width":512,"height":512,"caption":"JPR Services"},"image":{"@id":"https:\/\/www.jprservices.co.uk\/products\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/jprservices.co.uk","https:\/\/www.linkedin.com\/company\/jpr-services-welwyn-ltd\/"]}]}},"_links":{"self":[{"href":"https:\/\/www.jprservices.co.uk\/products\/wp-json\/wp\/v2\/product\/1727","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.jprservices.co.uk\/products\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.jprservices.co.uk\/products\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.jprservices.co.uk\/products\/wp-json\/wp\/v2\/media\/1719"}],"wp:attachment":[{"href":"https:\/\/www.jprservices.co.uk\/products\/wp-json\/wp\/v2\/media?parent=1727"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.jprservices.co.uk\/products\/wp-json\/wp\/v2\/product_brand?post=1727"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.jprservices.co.uk\/products\/wp-json\/wp\/v2\/product_cat?post=1727"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.jprservices.co.uk\/products\/wp-json\/wp\/v2\/product_tag?post=1727"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}