{"id":1483,"date":"2026-02-23T06:39:13","date_gmt":"2026-02-23T06:39:13","guid":{"rendered":"https:\/\/sltech.top\/ich\/?post_type=product&#038;p=1483"},"modified":"2026-04-01T07:42:12","modified_gmt":"2026-04-01T07:42:12","slug":"delta-duct-fd4-metalized-core-flexible-duct","status":"publish","type":"product","link":"https:\/\/sltech.top\/ich\/product\/delta-duct-fd4-metalized-core-flexible-duct\/","title":{"rendered":"Delta Duct FD4 \u2013 Metalized Core Flexible Duct"},"content":{"rendered":"<p><span data-path-to-node=\"13,0\"><b data-path-to-node=\"13,0\" data-index-in-node=\"0\"><span class=\"citation-280\">Delta Duct FD4<\/span><\/b><span class=\"citation-280\"> is an upgraded insulated flexible duct featuring an enhanced inner core for improved thermal reflection<\/span><\/span><span data-path-to-node=\"13,2\">. <\/span><span data-path-to-node=\"13,4\"><span class=\"citation-279\">While it shares the same durable metalized PET outer jacket as the FD3, its inner core is constructed from a double layer of metalized PET and clear polyester<\/span><\/span><span data-path-to-node=\"13,6\">. <\/span><span data-path-to-node=\"13,8\"><span class=\"citation-278\">This construction, combined with high-quality fiberglass insulation, provides a robust barrier against heat gain and air leakage<\/span><\/span><span data-path-to-node=\"13,10\">.<\/span><\/p>\n<p data-path-to-node=\"14\"><b data-path-to-node=\"14\" data-index-in-node=\"0\">Real-World Applications<\/b><\/p>\n<ul data-path-to-node=\"15\">\n<li>\n<p data-path-to-node=\"15,0,0\"><b data-path-to-node=\"15,0,0\" data-index-in-node=\"0\">Energy-Efficient Buildings:<\/b> Utilized in projects focusing on reducing thermal loss within the duct network.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"15,1,0\"><b data-path-to-node=\"15,1,0\" data-index-in-node=\"0\">Industrial Ventilation:<\/b> Ideal for light industrial settings where a more reflective inner core is preferred for temperature-sensitive air delivery.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"15,2,1\"><span data-path-to-node=\"15,2,1,0\"><b data-path-to-node=\"15,2,1,0\" data-index-in-node=\"0\"><span class=\"citation-277\">Retrofit Projects:<\/span><\/b><span class=\"citation-277\"> A quick means of correcting misalignment between existing rigid system components<\/span><\/span><span data-path-to-node=\"15,2,1,2\">.<\/span><\/p>\n<\/li>\n<\/ul>\n<p data-path-to-node=\"17\"><span data-path-to-node=\"17,0\"><b data-path-to-node=\"17,0\" data-index-in-node=\"0\"><span class=\"citation-276\">Specification: (from product catalog)<\/span><\/b> <\/span><\/p>\n<ul data-path-to-node=\"18\">\n<li>\n<p data-path-to-node=\"18,0,0\"><b data-path-to-node=\"18,0,0\" data-index-in-node=\"0\">Diameter:<\/b> 4&#8243; to 20&#8243;<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"18,1,0\"><b data-path-to-node=\"18,1,0\" data-index-in-node=\"0\">Inner Core:<\/b> Double layer metalized PET &amp; clear polyester<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"18,2,0\"><b data-path-to-node=\"18,2,0\" data-index-in-node=\"0\">Outer Jacket:<\/b> Metalized PET laminated over clear polyester<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"18,3,0\"><b data-path-to-node=\"18,3,0\" data-index-in-node=\"0\">Insulation Thickness:<\/b> 25 mm<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"18,4,0\"><b data-path-to-node=\"18,4,0\" data-index-in-node=\"0\">Max Velocity:<\/b> 5000 FPM (25.5 m\/s)<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"18,5,0\"><b data-path-to-node=\"18,5,0\" data-index-in-node=\"0\">Max Positive Pressure:<\/b> 10&#8243; W.C. (2.5 KPa)<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"18,6,0\"><b data-path-to-node=\"18,6,0\" data-index-in-node=\"0\">Insulation R-Value:<\/b> 4.2 or 6 (<span class=\"math-inline\" data-math=\"F-hr\/BTU\" data-index-in-node=\"30\">$F-hr\/BTU$<\/span>)<\/p>\n<\/li>\n<\/ul>\n<h3 data-path-to-node=\"20\"><b data-path-to-node=\"20\" data-index-in-node=\"0\">Authorized Distribution in Sri Lanka<\/b><\/h3>\n<p data-path-to-node=\"21\"><b data-path-to-node=\"21\" data-index-in-node=\"0\">Incube Holding Sri Lanka<\/b> is the primary sales and distribution agent for <b data-path-to-node=\"21\" data-index-in-node=\"73\">Delta Duct<\/b> air conditioning solutions and <b data-path-to-node=\"21\" data-index-in-node=\"115\">HAPRI<\/b> building insulation products. We provide direct access to these high-quality enterprise building materials, specializing in <b data-path-to-node=\"21\" data-index-in-node=\"245\">Thermal and Acoustic Insulation Solutions<\/b> across Sri Lanka.<\/p>\n<p data-path-to-node=\"22\">For reliable, durable, and international-standard air distribution systems, trust the partnership between <b data-path-to-node=\"22\" data-index-in-node=\"106\">Delta Duct<\/b> and <b data-path-to-node=\"22\" data-index-in-node=\"121\">Incube Holding<\/b>.<\/p>\n<p data-path-to-node=\"22\">\n","protected":false},"excerpt":{"rendered":"<ul>\n<li>\n<p data-path-to-node=\"6,0,0\"><b data-path-to-node=\"6,0,0\" data-index-in-node=\"0\">Applications:<\/b> Energy-Efficient Enterprise Buildings, Industrial Ventilation.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"6,1,0\"><b data-path-to-node=\"6,1,0\" data-index-in-node=\"0\">Key Features:<\/b><span class=\"citation-368 citation-end-368\"> Double-layer Metalized PET &amp; Clear Polyester Core for Enhanced Reflection.<\/span><\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"6,2,0\"><b data-path-to-node=\"6,2,0\" data-index-in-node=\"0\">Compliance:<\/b><span class=\"citation-367 citation-end-367\"> Superior Thermal Vapor Barrier, Maintenance-Free Air Routing.<\/span><\/p>\n<\/li>\n<\/ul>\n","protected":false},"featured_media":1484,"template":"","meta":{"_uag_custom_page_level_css":"","_swt_meta_header_display":false,"_swt_meta_footer_display":false,"_swt_meta_site_title_display":false,"_swt_meta_sticky_header":false,"_swt_meta_transparent_header":false},"product_brand":[42],"product_cat":[26,24],"product_tag":[51,44,53,50,52],"class_list":{"0":"post-1483","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_brand-delta-duct-insulation-materials-srilanka-incube-holdings","7":"product_cat-delta-duct-building-insulation-products-srilanka","8":"product_cat-flexible-duct-and-accessories","9":"product_tag-clear-polyester-core","10":"product_tag-delta-duct","11":"product_tag-delta-duct-fd4","12":"product_tag-double-layer-metalized-pet","13":"product_tag-industrial-ventilation","15":"first","16":"instock","17":"shipping-taxable","18":"product-type-simple"},"uagb_featured_image_src":{"full":["https:\/\/sltech.top\/ich\/wp-content\/uploads\/2026\/02\/delta-duct-pre-insulated-duct-panels-and-accessories-incube-holding-srilanka.png",550,413,false],"thumbnail":["https:\/\/sltech.top\/ich\/wp-content\/uploads\/2026\/02\/delta-duct-pre-insulated-duct-panels-and-accessories-incube-holding-srilanka-150x150.png",150,150,true],"medium":["https:\/\/sltech.top\/ich\/wp-content\/uploads\/2026\/02\/delta-duct-pre-insulated-duct-panels-and-accessories-incube-holding-srilanka-300x225.png",300,225,true],"medium_large":["https:\/\/sltech.top\/ich\/wp-content\/uploads\/2026\/02\/delta-duct-pre-insulated-duct-panels-and-accessories-incube-holding-srilanka.png",550,413,false],"large":["https:\/\/sltech.top\/ich\/wp-content\/uploads\/2026\/02\/delta-duct-pre-insulated-duct-panels-and-accessories-incube-holding-srilanka.png",550,413,false],"1536x1536":["https:\/\/sltech.top\/ich\/wp-content\/uploads\/2026\/02\/delta-duct-pre-insulated-duct-panels-and-accessories-incube-holding-srilanka.png",550,413,false],"2048x2048":["https:\/\/sltech.top\/ich\/wp-content\/uploads\/2026\/02\/delta-duct-pre-insulated-duct-panels-and-accessories-incube-holding-srilanka.png",550,413,false],"woocommerce_thumbnail":["https:\/\/sltech.top\/ich\/wp-content\/uploads\/2026\/02\/delta-duct-pre-insulated-duct-panels-and-accessories-incube-holding-srilanka-300x300.png",300,300,true],"woocommerce_single":["https:\/\/sltech.top\/ich\/wp-content\/uploads\/2026\/02\/delta-duct-pre-insulated-duct-panels-and-accessories-incube-holding-srilanka.png",550,413,false],"woocommerce_gallery_thumbnail":["https:\/\/sltech.top\/ich\/wp-content\/uploads\/2026\/02\/delta-duct-pre-insulated-duct-panels-and-accessories-incube-holding-srilanka-100x100.png",100,100,true]},"uagb_author_info":{"display_name":"ichadmin","author_link":"https:\/\/sltech.top\/ich\/author\/"},"uagb_comment_info":0,"uagb_excerpt":"Applications: Energy-Efficient Enterprise Buildings, Industrial Ventilation. Key Features: Double-layer Metalized PET &amp; Clear Polyester Core for Enhanced Reflection. Compliance: Superior Thermal Vapor Barrier, Maintenance-Free Air Routing.","_links":{"self":[{"href":"https:\/\/sltech.top\/ich\/wp-json\/wp\/v2\/product\/1483","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sltech.top\/ich\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/sltech.top\/ich\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sltech.top\/ich\/wp-json\/wp\/v2\/media\/1484"}],"wp:attachment":[{"href":"https:\/\/sltech.top\/ich\/wp-json\/wp\/v2\/media?parent=1483"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/sltech.top\/ich\/wp-json\/wp\/v2\/product_brand?post=1483"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/sltech.top\/ich\/wp-json\/wp\/v2\/product_cat?post=1483"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/sltech.top\/ich\/wp-json\/wp\/v2\/product_tag?post=1483"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}