{"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":"2026-10-08T23:36:08","modified_gmt":"2026-10-09T06:36:08","slug":"primary-vs-medium-vs-high-efficiency-filters-comparison","status":"publish","type":"post","link":"https:\/\/www.26yc.com\/ja\/primary-vs-medium-vs-high-efficiency-filters-comparison\/","title":{"rendered":"\u521d\u52b9\u7387 vs \u4e2d\u52b9\u7387 vs \u9ad8\u52b9\u7387\u30d5\u30a3\u30eb\u30bf\u30fc\uff1a\u6a2a\u4e26\u3073\u6bd4\u8f03"},"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>\u30b3\u30b9\u30c8<\/td>\n<td>\u4f4e<\/td>\n<td>Medium<\/td>\n<td>\u9ad8<\/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=\"\/ja\/industrial\/filter\/primary-filters\/\">primary<\/a>, <a href=\"\/ja\/industrial\/filter\/medium-filters\/\">medium<\/a> \u3068 <a href=\"\/ja\/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>\u30d1\u30e9\u30e1\u30fc\u30bf<\/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>\u898f\u683c<\/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>\u52b9\u7387<\/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>\n<h2>\u3088\u304f\u3042\u308b\u8cea\u554f<\/h2>\n<p><strong>How are the three efficiency tiers distinguished?<\/strong><br \/>They are separated by the particle size they capture and their efficiency: coarse G classes, fine F classes and HEPA H classes.<\/p>\n<p><strong>Which tiers suit a typical office?<\/strong><br \/>A two-stage G4 pre-filter plus an F7 final filter covers general comfort ventilation in most offices.<\/p>\n<p><strong>Why are filters arranged in stages?<\/strong><br \/>Staging lets each tier handle its own size band, protects the finer media and lowers the overall cost of filtration.<\/p>\n<p><strong>Does higher efficiency always mean higher pressure drop?<\/strong><br \/>Usually, but modern media design narrows the gap, so balance energy use against the required level of cleanliness.<\/p>\n<div class=\"yc-related\">\n<h3>\u95a2\u9023\u8a18\u4e8b<\/h3>\n<ul>\n<li><a href=\"https:\/\/www.26yc.com\/ja\/air-filter-maintenance-replacement-pressure-drop\/\" title=\"Air Filter Maintenance and Replacement: Pressure Drop, Service Life, When to Change\">Air Filter Maintenance and Replacement: Pressure Drop, Service Life, When to Change<\/a><\/li>\n<li><a href=\"https:\/\/www.26yc.com\/ja\/air-filter-basics-how-air-filters-work\/\" title=\"\u7a7a\u6c23\u30d5\u30a3\u30eb\u30bf\u30fc\u306e\u57fa\u790e\uff1a\u4ed5\u7d44\u307f\u3068 HVAC \u30b7\u30b9\u30c6\u30e0\u306b\u5fc5\u8981\u306a\u7406\u7531\">\u7a7a\u6c23\u30d5\u30a3\u30eb\u30bf\u30fc\u306e\u57fa\u790e\uff1a\u4ed5\u7d44\u307f\u3068 HVAC \u30b7\u30b9\u30c6\u30e0\u306b\u5fc5\u8981\u306a\u7406\u7531<\/a><\/li>\n<li><a href=\"https:\/\/www.26yc.com\/ja\/pet-biochemical-cotton-filter-media-resin-mesh-panel-filters\/\" title=\"PET \u751f\u5316\u5b66\u7dbf\u30d5\u30a3\u30eb\u30bf\u30fc\u6750\u304a\u3088\u3073\u6a39\u8102\u30e1\u30c3\u30b7\u30e5\u30d1\u30cd\u30eb\u30d5\u30a3\u30eb\u30bf\u30fc\">PET Biochemical Cotton Filter Media &amp;amp; Resin Mesh Panel Filters<\/a><\/li>\n<\/ul>\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\/ja\/wp-json\/wp\/v2\/posts\/4725","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.26yc.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.26yc.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.26yc.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.26yc.com\/ja\/wp-json\/wp\/v2\/comments?post=4725"}],"version-history":[{"count":4,"href":"https:\/\/www.26yc.com\/ja\/wp-json\/wp\/v2\/posts\/4725\/revisions"}],"predecessor-version":[{"id":5068,"href":"https:\/\/www.26yc.com\/ja\/wp-json\/wp\/v2\/posts\/4725\/revisions\/5068"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.26yc.com\/ja\/wp-json\/wp\/v2\/media\/4736"}],"wp:attachment":[{"href":"https:\/\/www.26yc.com\/ja\/wp-json\/wp\/v2\/media?parent=4725"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.26yc.com\/ja\/wp-json\/wp\/v2\/categories?post=4725"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.26yc.com\/ja\/wp-json\/wp\/v2\/tags?post=4725"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}