{"id":4725,"date":"2026-09-23T23:15:52","date_gmt":"2026-09-24T06:15:52","guid":{"rendered":"https:\/\/www.26yc.com\/primary-vs-medium-vs-high-efficiency-filters-comparison\/"},"modified":"2026-09-23T23:58:03","modified_gmt":"2026-09-24T06:58:03","slug":"primary-vs-medium-vs-high-efficiency-filters-comparison","status":"publish","type":"post","link":"https:\/\/www.26yc.com\/zh_cn\/primary-vs-medium-vs-high-efficiency-filters-comparison\/","title":{"rendered":"Primary vs Medium vs High-Efficiency Filters: Side-by-Side Comparison"},"content":{"rendered":"<h2>The Three Tiers at a Glance<\/h2>\n<table border=\"1\" cellpadding=\"6\" cellspacing=\"0\">\n<thead>\n<tr>\n<th><\/th>\n<th>Primary (G1-G4)<\/th>\n<th>Medium (F5-F9)<\/th>\n<th>HEPA\/ULPA (H10-H14+)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Removes<\/td>\n<td>Coarse dust, hair, fibres<\/td>\n<td>Fine dust, pollen, microbes<\/td>\n<td>Sub-micron, bacteria, most viruses<\/td>\n<\/tr>\n<tr>\n<td>Initial \u0394P<\/td>\n<td>20-45 Pa<\/td>\n<td>45-95 Pa<\/td>\n<td>100-300 Pa<\/td>\n<\/tr>\n<tr>\n<td>Life<\/td>\n<td>3-6 months<\/td>\n<td>6-12 months<\/td>\n<td>1-3 years<\/td>\n<\/tr>\n<tr>\n<td>Cost<\/td>\n<td>Low<\/td>\n<td>Medium<\/td>\n<td>High<\/td>\n<\/tr>\n<tr>\n<td>Typical role<\/td>\n<td>Pre-filter<\/td>\n<td>Final or pre-HEPA<\/td>\n<td>Final in clean\/critical spaces<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>How They Work Together<\/h2>\n<p>A sound design stacks them: <strong>G4 pre &#8211; F7\/F9 medium &#8211; H13\/H14 HEPA<\/strong>. The pre-filter shields the costly stages; the medium lifts IAQ; the HEPA guarantees cleanliness where it counts.<\/p>\n<h2>Picking Your Combination<\/h2>\n<ul>\n<li>Comfort HVAC: G4 + F7.<\/li>\n<li>Health-care: G4 + F8 + H13 terminal.<\/li>\n<li>Cleanroom: G4 + F9 + H14 (add U15 for ISO 3-4).<\/li>\n<\/ul>\n<p>Browse our <a href=\"\/zh_cn\/industrial\/filter\/primary-filters\/\">primary<\/a>, <a href=\"\/zh_cn\/industrial\/filter\/medium-filters\/\">medium<\/a> and <a href=\"\/zh_cn\/industrial\/filter\/hepa-filters\/\">HEPA<\/a> product guides for model-level specs.<\/p>\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>Product Line-up &amp; Side-by-Side Specifications<\/h2>\n<div class=\"yc-thumb-row\">\n<figure><img decoding=\"async\" src=\"https:\/\/www.26yc.com\/wp-content\/uploads\/2026\/09\/filter-primary-panel.jpg\" alt=\"Primary panel air filter G1-G4\" width=\"1024\" height=\"1024\" loading=\"lazy\"><figcaption>Primary \u2014 panel \/ pocket (G1\u2013G4)<\/figcaption><\/figure>\n<figure><img decoding=\"async\" src=\"https:\/\/www.26yc.com\/wp-content\/uploads\/2026\/09\/filter-medium-bag.jpg\" alt=\"Medium efficiency pocket bag air filter F5-F9\" width=\"1024\" height=\"1024\" loading=\"lazy\"><figcaption>Medium \u2014 pocket \/ V-cell (F5\u2013F9)<\/figcaption><\/figure>\n<figure><img decoding=\"async\" src=\"https:\/\/www.26yc.com\/wp-content\/uploads\/2026\/09\/filter-hepa-pleated.jpg\" alt=\"Deep-pleat HEPA air filter H10-H14\" width=\"1024\" height=\"1024\" loading=\"lazy\"><figcaption>High \u2014 HEPA \/ ULPA (H10\u2013H14)<\/figcaption><\/figure>\n<\/div>\n<table class=\"yc-spec\">\n<thead>\n<tr>\n<th>Parameter<\/th>\n<th>Primary G4<\/th>\n<th>Medium F7<\/th>\n<th>High-efficiency H13<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Standard<\/td>\n<td>EN 779 \/ ISO 16890 Coarse<\/td>\n<td>EN 779 \/ ISO 16890 ePM1<\/td>\n<td>EN 1822<\/td>\n<\/tr>\n<tr>\n<td>Efficiency<\/td>\n<td>90\u201395% arrestance<\/td>\n<td>80\u201390% (ePM1 50\u201365%)<\/td>\n<td>\u2265 99.95% @ MPPS<\/td>\n<\/tr>\n<tr>\n<td>Position in the filtration train<\/td>\n<td>1st stage \u2014 protects downstream filters<\/td>\n<td>2nd stage \u2014 supply-air quality<\/td>\n<td>Terminal \u2014 cleanrooms, labs, operating theatres<\/td>\n<\/tr>\n<tr>\n<td>Typical initial \u0394P<\/td>\n<td>45\u201370 Pa<\/td>\n<td>95\u2013130 Pa<\/td>\n<td>200\u2013250 Pa<\/td>\n<\/tr>\n<tr>\n<td>Recommended final \u0394P<\/td>\n<td>150 Pa<\/td>\n<td>250\u2013300 Pa<\/td>\n<td>450\u2013600 Pa<\/td>\n<\/tr>\n<tr>\n<td>Typical replacement interval<\/td>\n<td>3\u20136 months<\/td>\n<td>6\u201312 months<\/td>\n<td>1\u20133 years (\u0394P based)<\/td>\n<\/tr>\n<tr>\n<td>Typical applications<\/td>\n<td>Outdoor-air and return-air pre-filtration in AHUs<\/td>\n<td>Offices, malls, food &amp; pharma HVAC<\/td>\n<td>Hospitals, cleanrooms, coating booths, electronics<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p class=\"yc-note\">Rule of thumb: stage primary \u2192 medium \u2192 high efficiency in series, and let each stage reach its recommended final \u0394P before replacement \u2014 this is what protects the more expensive stage behind it.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>A one-page comparison of primary (G1-G4), medium (F5-F9) and HEPA\/ULPA (H10-H14) air filters-efficiency, pressure drop, life, cost and where each belongs.<\/p>","protected":false},"author":1,"featured_media":4736,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[109,358,357,356],"tags":[],"class_list":["post-4725","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-filter","category-hepa-filters","category-medium-filters","category-primary-filters"],"_links":{"self":[{"href":"https:\/\/www.26yc.com\/zh_cn\/wp-json\/wp\/v2\/posts\/4725","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.26yc.com\/zh_cn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.26yc.com\/zh_cn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.26yc.com\/zh_cn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.26yc.com\/zh_cn\/wp-json\/wp\/v2\/comments?post=4725"}],"version-history":[{"count":2,"href":"https:\/\/www.26yc.com\/zh_cn\/wp-json\/wp\/v2\/posts\/4725\/revisions"}],"predecessor-version":[{"id":4741,"href":"https:\/\/www.26yc.com\/zh_cn\/wp-json\/wp\/v2\/posts\/4725\/revisions\/4741"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.26yc.com\/zh_cn\/wp-json\/wp\/v2\/media\/4736"}],"wp:attachment":[{"href":"https:\/\/www.26yc.com\/zh_cn\/wp-json\/wp\/v2\/media?parent=4725"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.26yc.com\/zh_cn\/wp-json\/wp\/v2\/categories?post=4725"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.26yc.com\/zh_cn\/wp-json\/wp\/v2\/tags?post=4725"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}