{"id":6076,"date":"2026-08-26T12:01:54","date_gmt":"2026-08-26T05:01:54","guid":{"rendered":"https:\/\/onggiosaoviet.vn\/?p=6076"},"modified":"2026-08-26T12:01:54","modified_gmt":"2026-08-26T05:01:54","slug":"ong-gio-bi-ro-ri-o-dau-7-vi-tri-nha-thau-nen-kiem-tra-truoc-khi-nghiem-thu","status":"publish","type":"post","link":"https:\/\/onggiosaoviet.vn\/en\/ong-gio-bi-ro-ri-o-dau-7-vi-tri-nha-thau-nen-kiem-tra-truoc-khi-nghiem-thu\/","title":{"rendered":"Where Are Air Duct Leaks? 7 Locations Contractors Should Check Before Acceptance."},"content":{"rendered":"<p class=\"wp-block-paragraph\">During HVAC system installation, controlling the tightness of the duct network is one of the factors that directly affects operational efficiency. A system fabricated to the correct dimensions but with numerous leaks can still reduce airflow efficiency, increase fan load, and cause difficulties during acceptance testing.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For M&amp;E and fire protection contractors, detecting leaks as early as possible helps minimize dismantling, repairs, and on-site labor costs. Therefore, from the fabrication, transportation, and installation stages, ductwork connections need to be systematically monitored.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">1. Why can air ducts leak?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Leaks don&#039;t necessarily originate from the pipe itself. In fact, many sensitive areas are located at the pipe joints.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Some common causes include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The joints between the pipe sections are not airtight.<\/li>\n\n\n\n<li>The wall is misaligned or unevenly connected.<\/li>\n\n\n\n<li>The corner flange has a gap.<\/li>\n\n\n\n<li>The accessories are the wrong size.<\/li>\n\n\n\n<li>The connection point to the device has not been properly addressed.<\/li>\n\n\n\n<li>The access hatch or technical opening is not airtight.<\/li>\n\n\n\n<li>The pipe was deformed during transportation.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/onggiosaoviet.vn\/wp-content\/uploads\/2026\/07\/Anh-1-Bai-11-1536x1152-1-1024x768.png\" alt=\"\" class=\"wp-image-6058\" srcset=\"https:\/\/onggiosaoviet.vn\/wp-content\/uploads\/2026\/07\/Anh-1-Bai-11-1536x1152-1-1024x768.png 1024w, https:\/\/onggiosaoviet.vn\/wp-content\/uploads\/2026\/07\/Anh-1-Bai-11-1536x1152-1-300x225.png 300w, https:\/\/onggiosaoviet.vn\/wp-content\/uploads\/2026\/07\/Anh-1-Bai-11-1536x1152-1-768x576.png 768w, https:\/\/onggiosaoviet.vn\/wp-content\/uploads\/2026\/07\/Anh-1-Bai-11-1536x1152-1-16x12.png 16w, https:\/\/onggiosaoviet.vn\/wp-content\/uploads\/2026\/07\/Anh-1-Bai-11-1536x1152-1-600x450.png 600w, https:\/\/onggiosaoviet.vn\/wp-content\/uploads\/2026\/07\/Anh-1-Bai-11-1536x1152-1.png 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">2. 7 areas contractors should check<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><strong>Inspection location<\/strong><\/th><th><strong>Common risks<\/strong><\/th><th><strong>Content to be checked<\/strong><\/th><\/tr><\/thead><tbody><tr><td>Pipe joint<\/td><td>Slit<\/td><td>Check the entire perimeter.<\/td><\/tr><tr><td>Bich<\/td><td>Crooked, bent<\/td><td>Check for uniformity<\/td><\/tr><tr><td>Wall corner<\/td><td>Corner gap<\/td><td>Check the link<\/td><\/tr><tr><td>Go, turn, move<\/td><td>Incorrect size<\/td><td>Compare with the drawings.<\/td><\/tr><tr><td>Connecting the device<\/td><td>Loose joint<\/td><td>Check the contact point.<\/td><\/tr><tr><td>Visitor Gate<\/td><td>Untight<\/td><td>Check the opening and closing mechanism.<\/td><\/tr><tr><td>Through walls\/floors<\/td><td>Open around<\/td><td>Complete check<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">3. Precision machining helps reduce risk from the outset.<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This is why contractors should not evaluate suppliers based solely on unit price.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A professional outsourcing unit needs to control both simultaneously:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Size.<\/li>\n\n\n\n<li>Squareness.<\/li>\n\n\n\n<li>Flatness.<\/li>\n\n\n\n<li>Position of the flange.<\/li>\n\n\n\n<li>Accessory dimensions.<\/li>\n\n\n\n<li>Joint specifications.<\/li>\n\n\n\n<li>Product condition before shipment.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Sao Viet Air Duct<\/strong> The aim is to control the product from the initial drawing acceptance to manufacturing and delivery, thereby helping contractors minimize the need for on-site modifications.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">4. Defects should not only be discovered during acceptance testing.<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">If we wait until the acceptance testing phase to inspect the entire system, the repair costs could increase significantly.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The contractor should conduct inspections in stages:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Processing \u2192 In-factory QC \u2192 Delivery \u2192 Installation \u2192 Final inspection \u2192 Acceptance testing.<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The airtightness of a duct system is the result of a whole chain from design and fabrication to installation. The selection <strong>Sao Viet air duct<\/strong> We should not only look at the final product but also at the ability to coordinate with the contractor throughout the project execution.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Contact information<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>SAO VIET AIR DUCT MANUFACTURING AND TRADING COMPANY LIMITED<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Address:<\/strong> 267 Le Thanh Tong Street, May Chai Ward, Ngo Quyen District, Hai Phong City.<\/li>\n\n\n\n<li><strong>Hotline:<\/strong> 0815.999.826 (Mrs. Hang) \u2013 0934.559.168 (Mrs. Giang)<\/li>\n\n\n\n<li><strong>E-mail:<\/strong> <a href=\"mailto:vietonggio@gmail.com\">vietonggio@gmail.com<\/a><\/li>\n<\/ul>\n\n\n<figure class=\"wp-block-post-featured-image\"><img decoding=\"async\" width=\"1536\" height=\"1152\" src=\"https:\/\/onggiosaoviet.vn\/wp-content\/uploads\/2026\/07\/Anh-1-Bai-11-1536x1152-1.png\" class=\"attachment-post-thumbnail size-post-thumbnail wp-post-image\" alt=\"\" style=\"object-fit:cover;\" srcset=\"https:\/\/onggiosaoviet.vn\/wp-content\/uploads\/2026\/07\/Anh-1-Bai-11-1536x1152-1.png 1536w, https:\/\/onggiosaoviet.vn\/wp-content\/uploads\/2026\/07\/Anh-1-Bai-11-1536x1152-1-300x225.png 300w, https:\/\/onggiosaoviet.vn\/wp-content\/uploads\/2026\/07\/Anh-1-Bai-11-1536x1152-1-1024x768.png 1024w, https:\/\/onggiosaoviet.vn\/wp-content\/uploads\/2026\/07\/Anh-1-Bai-11-1536x1152-1-768x576.png 768w, https:\/\/onggiosaoviet.vn\/wp-content\/uploads\/2026\/07\/Anh-1-Bai-11-1536x1152-1-16x12.png 16w, https:\/\/onggiosaoviet.vn\/wp-content\/uploads\/2026\/07\/Anh-1-Bai-11-1536x1152-1-600x450.png 600w\" sizes=\"(max-width: 1536px) 100vw, 1536px\" \/><\/figure>","protected":false},"excerpt":{"rendered":"<p>Trong qu\u00e1 tr\u00ecnh thi c\u00f4ng h\u1ec7 th\u1ed1ng HVAC, vi\u1ec7c ki\u1ec3m so\u00e1t \u0111\u1ed9 k\u00edn c\u1ee7a m\u1ea1ng l\u01b0\u1edbi \u1ed1ng gi\u00f3 l\u00e0 m\u1ed9t trong nh\u1eefng y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn hi\u1ec7u qu\u1ea3 v\u1eadn h\u00e0nh. M\u1ed9t h\u1ec7 th\u1ed1ng \u0111\u01b0\u1ee3c gia c\u00f4ng \u0111\u00fang k\u00edch th\u01b0\u1edbc nh\u01b0ng c\u00f3 nhi\u1ec1u \u0111i\u1ec3m r\u00f2 r\u1ec9 v\u1eabn c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m hi\u1ec7u su\u1ea5t [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":6058,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[439,327,442,441,443,392,133,311,130,132,440,438,135],"class_list":["post-6076","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc","tag-do-kin-ong-gio","tag-he-thong-hvac","tag-kiem-tra-ong-gio","tag-moi-noi-ong-gio","tag-nghiem-thu-ong-gio-duct-leakage","tag-nha-thau-me","tag-ong-gio-hai-phong","tag-ong-gio-sao-viet-2","tag-ong-gio-sao-viet","tag-ong-gio-sao-viet-hai-phong","tag-qc-hvac","tag-ro-ri-ong-gio","tag-san-xuat-ong-gio-hai-phong"],"_links":{"self":[{"href":"https:\/\/onggiosaoviet.vn\/en\/wp-json\/wp\/v2\/posts\/6076","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/onggiosaoviet.vn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/onggiosaoviet.vn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/onggiosaoviet.vn\/en\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/onggiosaoviet.vn\/en\/wp-json\/wp\/v2\/comments?post=6076"}],"version-history":[{"count":1,"href":"https:\/\/onggiosaoviet.vn\/en\/wp-json\/wp\/v2\/posts\/6076\/revisions"}],"predecessor-version":[{"id":6078,"href":"https:\/\/onggiosaoviet.vn\/en\/wp-json\/wp\/v2\/posts\/6076\/revisions\/6078"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/onggiosaoviet.vn\/en\/wp-json\/wp\/v2\/media\/6058"}],"wp:attachment":[{"href":"https:\/\/onggiosaoviet.vn\/en\/wp-json\/wp\/v2\/media?parent=6076"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/onggiosaoviet.vn\/en\/wp-json\/wp\/v2\/categories?post=6076"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/onggiosaoviet.vn\/en\/wp-json\/wp\/v2\/tags?post=6076"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}