{"id":50325,"date":"2025-10-07T16:00:19","date_gmt":"2025-10-07T13:00:19","guid":{"rendered":"https:\/\/airfi.fi\/news\/infobite-4-the-benefits-of-sectional-defrost-in-air-handling-units\/"},"modified":"2025-10-08T16:18:07","modified_gmt":"2025-10-08T13:18:07","slug":"infobite-4-the-benefits-of-sectional-defrost-in-air-handling-units","status":"publish","type":"post","link":"https:\/\/airfi.fi\/en\/airfi-academy\/infobite-4-the-benefits-of-sectional-defrost-in-air-handling-units\/","title":{"rendered":"Infobite 4: The Benefits of Sectional Defrost in Air Handling Units"},"content":{"rendered":"\n<p><strong>Sectional defrost <\/strong>is a control method where frost formed in the heat recovery system is defrosted in controlled sections. In practice, this is an energy-efficient way to defrost. <\/p>\n\n<p>Sectional defrost means a defrosting method where:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>The heat recovery cell (HR cell) is divided into sections (e.g., 2\u20134 sectors).<\/li>\n\n\n\n<li>In frost protection mode, the cell is defrosted section by section using the heat from the exhaust air.<\/li>\n\n\n\n<li>Other sections continue heat recovery simultaneously. <\/li>\n<\/ul>\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h2 class=\"wp-block-heading\"><strong>Technical Benefits<\/strong><\/h2>\n\n<p>When defrosting is targeted to separate sections, the air handling unit\u2019s energy efficiency and performance remain consistently high. <\/p>\n\n<p>With sectional defrost, it is possible to maintain:<\/p>\n\n<ul class=\"wp-block-list\">\n<li><strong>Stable airflow<\/strong><\/li>\n\n\n\n<li><strong>Energy efficiency<\/strong> \u2013 optimized heat recovery<\/li>\n\n\n\n<li><strong>System reliability<\/strong> \u2013 steady operation even in freezing conditions<\/li>\n\n\n\n<li><strong> Indoor air balance<\/strong> \u2013 continuous and controlled ventilation for users.<\/li>\n<\/ul>\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<p>Airfi air handling units Model 250, Model 350, and Airfi C5 all include the sectional defrost feature as standard. We recommend ensuring that when purchasing an air handling unit in this size category, it is equipped with sectional defrost as standard to guarantee energy efficiency. <\/p>\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<figure class=\"wp-block-image size-full is-resized\"><img alt=\"\" decoding=\"async\" width=\"1000\" height=\"1000\" src=\"https:\/\/airfi.fi\/app\/uploads\/2025\/10\/lohkosulatus_tietoisku.jpg\" alt=\"\" class=\"wp-image-50228\" style=\"width:500px\" srcset=\"https:\/\/airfi.fi\/app\/uploads\/2025\/10\/lohkosulatus_tietoisku.jpg 1000w, https:\/\/airfi.fi\/app\/uploads\/2025\/10\/lohkosulatus_tietoisku-150x150.jpg 150w, https:\/\/airfi.fi\/app\/uploads\/2025\/10\/lohkosulatus_tietoisku-410x410.jpg 410w, https:\/\/airfi.fi\/app\/uploads\/2025\/10\/lohkosulatus_tietoisku-600x600.jpg 600w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Sectional defrost is a control method where frost formed in the heat recovery system is defrosted in controlled sections. In practice, this is an energy-efficient way to defrost. Sectional defrost means a defrosting method where: Technical Benefits When defrosting is targeted to separate sections, the air handling unit\u2019s energy efficiency and performance remain consistently high. [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":50237,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_robots_primary_cat":"none","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","_improvement_type_select":"improve_an_existing","_thumb_yes_seoaic":false,"_frame_yes_seoaic":false,"seoaic_generate_description":"","seoaic_improve_instructions_prompt":"","seoaic_rollback_content_improvement":"","seoaic_idea_thumbnail_generator":"","thumbnail_generated":false,"thumbnail_generate_prompt":"","seoaic_article_description":"","seoaic_article_subtitles":[],"footnotes":""},"categories":[360,308],"tags":[],"class_list":{"0":"post-50325","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-infobite","8":"category-airfi-academy"},"acf":[],"_links":{"self":[{"href":"https:\/\/airfi.fi\/en\/wp-json\/wp\/v2\/posts\/50325","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/airfi.fi\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/airfi.fi\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/airfi.fi\/en\/wp-json\/wp\/v2\/users\/10"}],"replies":[{"embeddable":true,"href":"https:\/\/airfi.fi\/en\/wp-json\/wp\/v2\/comments?post=50325"}],"version-history":[{"count":0,"href":"https:\/\/airfi.fi\/en\/wp-json\/wp\/v2\/posts\/50325\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/airfi.fi\/en\/wp-json\/wp\/v2\/media\/50237"}],"wp:attachment":[{"href":"https:\/\/airfi.fi\/en\/wp-json\/wp\/v2\/media?parent=50325"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/airfi.fi\/en\/wp-json\/wp\/v2\/categories?post=50325"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/airfi.fi\/en\/wp-json\/wp\/v2\/tags?post=50325"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}