{"id":4722,"date":"2026-09-23T23:15:52","date_gmt":"2026-09-24T06:15:52","guid":{"rendered":"https:\/\/www.26yc.com\/primary-filters-g1-g4-panel-pocket-specifications\/"},"modified":"2026-09-23T23:58:03","modified_gmt":"2026-09-24T06:58:03","slug":"primary-filters-g1-g4-panel-pocket-specifications","status":"publish","type":"post","link":"https:\/\/www.26yc.com\/ko\/primary-filters-g1-g4-panel-pocket-specifications\/","title":{"rendered":"Primary (Pre) Filters G1-G4: Panel and Pocket Types, Specifications, Selection"},"content":{"rendered":"<h2>What a Primary Filter Is For<\/h2>\n<p>Primary (pre) filters sit first in the bank. They capture the bulk of coarse dust so the more expensive medium or HEPA stage lasts longer and stays clean.<\/p>\n<h2>Common Types<\/h2>\n<ul>\n<li><strong>Panel filters<\/strong> &#8211; cardboard or metal frame, synthetic or glass media; cheapest, for G2-G4.<\/li>\n<li><strong>Pocket \/ bag filters<\/strong> &#8211; several deep pockets of synthetic media; larger area, lower \u0394P, G3-G4 and into F5.<\/li>\n<li><strong>Roll \/ automatic filters<\/strong> &#8211; continuously fed media for very dusty intakes.<\/li>\n<li><strong>Washable metal mesh<\/strong> &#8211; reusable coarse screen for grease\/intake hoods.<\/li>\n<\/ul>\n<h2>Typical Specifications<\/h2>\n<table border=\"1\" cellpadding=\"6\" cellspacing=\"0\">\n<thead>\n<tr>\n<th>Class<\/th>\n<th>Arrestance<\/th>\n<th>Initial \u0394P<\/th>\n<th>Frame<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>G3<\/td>\n<td>80-90%<\/td>\n<td>25-40 Pa<\/td>\n<td>Cardboard \/ metal<\/td>\n<\/tr>\n<tr>\n<td>G4<\/td>\n<td>\u2265 90%<\/td>\n<td>30-45 Pa<\/td>\n<td>Cardboard \/ metal<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Selection Checklist<\/h2>\n<ul>\n<li>Match frame size to the existing holding frame (592\u00d7592 mm and 495\u00d7495 mm are common).<\/li>\n<li>Pick G4 for most HVAC; G3 where dust is very heavy and cost rules.<\/li>\n<li>Confirm max operating temperature (synthetic ~70-80 \u00b0C; glass higher).<\/li>\n<li>Choose pockets over panels when space allows lower \u0394P.<\/li>\n<\/ul>\n<p>.yc-spec-wrap{margin:36px 0 28px}<br \/>\n.yc-spec-wrap figure{margin:0 0 24px;text-align:center}<br \/>\n.yc-spec-wrap figure img{max-width:100%;height:auto;border:1px solid #e5e7eb;border-radius:8px}<br \/>\n.yc-spec-wrap figcaption{font-size:14px;color:#6b7280;margin-top:8px}<br \/>\n.yc-spec{width:100%;border-collapse:collapse;font-size:15px;margin:8px 0 16px}<br \/>\n.yc-spec th,.yc-spec td{border:1px solid #d1d5db;padding:9px 12px;text-align:left;vertical-align:top}<br \/>\n.yc-spec th{background:#1f3a5f;color:#fff}<br \/>\n.yc-spec tr:nth-child(even) td{background:#f8fafc}<br \/>\n.yc-note{font-size:14px;color:#6b7280;margin-top:4px}<br \/>\n.yc-thumb-row{display:flex;gap:16px;flex-wrap:wrap;margin:0 0 20px}<br \/>\n.yc-thumb-row figure{flex:1 1 240px;margin:0;text-align:center}<\/p>\n<p><!-- yc-spec-section --><\/p>\n<div class=\"yc-spec-wrap\">\n<h2>Model Range &amp; Specifications<\/h2>\n<figure><img decoding=\"async\" src=\"https:\/\/www.26yc.com\/wp-content\/uploads\/2026\/09\/filter-primary-panel.jpg\" alt=\"26YC G4 primary panel air filter with cardboard frame\" width=\"1024\" height=\"1024\" loading=\"lazy\"><figcaption>26YC primary panel filter \u2014 cardboard or galvanized frame, synthetic media<\/figcaption><\/figure>\n<table class=\"yc-spec\">\n<thead>\n<tr>\n<th>Model<\/th>\n<th>EN 779 class<\/th>\n<th>ISO 16890 equivalent<\/th>\n<th>Arrestance<\/th>\n<th>Media &amp; frame<\/th>\n<th>Typical initial \u0394P<\/th>\n<th>Recommended final \u0394P<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>26YC-PF-G1-595<\/td>\n<td>G1<\/td>\n<td>ISO Coarse 40\u201350%<\/td>\n<td>50\u201365%<\/td>\n<td>Synthetic media, cardboard frame, 46 mm<\/td>\n<td>25\u201340 Pa<\/td>\n<td rowspan=\"4\">150 Pa<\/td>\n<\/tr>\n<tr>\n<td>26YC-PF-G2-595<\/td>\n<td>G2<\/td>\n<td>ISO Coarse 50\u201360%<\/td>\n<td>65\u201380%<\/td>\n<td>Synthetic media, cardboard frame, 46 mm<\/td>\n<td>30\u201345 Pa<\/td>\n<\/tr>\n<tr>\n<td>26YC-PF-G3-595<\/td>\n<td>G3<\/td>\n<td>ISO Coarse 60\u201370%<\/td>\n<td>80\u201390%<\/td>\n<td>Synthetic \/ PET media, cardboard or galvanized frame, 46 mm<\/td>\n<td>35\u201355 Pa<\/td>\n<\/tr>\n<tr>\n<td>26YC-PF-G4-595<\/td>\n<td>G4<\/td>\n<td>ISO Coarse 70\u201380%<\/td>\n<td>90\u201395%<\/td>\n<td>Synthetic \/ PET media, galvanized frame, 46 mm<\/td>\n<td>45\u201370 Pa<\/td>\n<\/tr>\n<tr>\n<td>26YC-PK-G4-600<\/td>\n<td>G4<\/td>\n<td>ISO Coarse 70\u201380%<\/td>\n<td>90\u201395%<\/td>\n<td>Synthetic bag, 5\u20136 pockets, galvanized header, 360\u2013600 mm deep<\/td>\n<td>40\u201360 Pa<\/td>\n<td>150 Pa<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p class=\"yc-note\">Standard face size 595 \u00d7 595 mm (592 \u00d7 592 mm available); rated face velocity 0.9\u20131.0 m\/s; max continuous temperature 80 \u00b0C for synthetic media. Custom sizes, aluminium \/ stainless frames and washable PET media on request \u2014 send us your AHU drawings for a free selection.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Primary (pre) air filters G1-G4 protect downstream stages and cut cost. Compare panel, pocket, roll and washable types, with specs and a practical selection checklist.<\/p>","protected":false},"author":1,"featured_media":4735,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[109,356],"tags":[],"class_list":["post-4722","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-filter","category-primary-filters"],"_links":{"self":[{"href":"https:\/\/www.26yc.com\/ko\/wp-json\/wp\/v2\/posts\/4722","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.26yc.com\/ko\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.26yc.com\/ko\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.26yc.com\/ko\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.26yc.com\/ko\/wp-json\/wp\/v2\/comments?post=4722"}],"version-history":[{"count":2,"href":"https:\/\/www.26yc.com\/ko\/wp-json\/wp\/v2\/posts\/4722\/revisions"}],"predecessor-version":[{"id":4738,"href":"https:\/\/www.26yc.com\/ko\/wp-json\/wp\/v2\/posts\/4722\/revisions\/4738"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.26yc.com\/ko\/wp-json\/wp\/v2\/media\/4735"}],"wp:attachment":[{"href":"https:\/\/www.26yc.com\/ko\/wp-json\/wp\/v2\/media?parent=4722"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.26yc.com\/ko\/wp-json\/wp\/v2\/categories?post=4722"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.26yc.com\/ko\/wp-json\/wp\/v2\/tags?post=4722"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}