{"id":9436,"date":"2026-06-28T05:02:33","date_gmt":"2026-06-27T22:02:33","guid":{"rendered":"https:\/\/airfiltech.vn\/merv-epm-va-en-779-chon-bo-loc-ahu-nao-cho-toa-nha-thuong-mai\/"},"modified":"2026-09-10T13:08:55","modified_gmt":"2026-09-10T06:08:55","slug":"merv-epm-va-en-779-chon-bo-loc-ahu-nao-cho-toa-nha-thuong-mai","status":"publish","type":"post","link":"https:\/\/airfiltech.vn\/en\/merv-epm-va-en-779-chon-bo-loc-ahu-nao-cho-toa-nha-thuong-mai\/","title":{"rendered":"MERV, ePM and EN 779: Which AHU Filter Should You Choose for Commercial Buildings?"},"content":{"rendered":"<p>Selecting the right Air Handling Unit (AHU) filter is critical for office buildings, hotels, shopping malls, and airports, where indoor air quality standards, energy efficiency, and occupant comfort must all be balanced.<\/p>\n<h2>1. Comparing Filter Classification Systems<\/h2>\n<h3>MERV (United States)<\/h3>\n<ul>\n<li>MERV 1\u20134: coarse filtration<\/li>\n<li>MERV 7\u20138: roughly equivalent to G4\u2013F5<\/li>\n<li>MERV 11\u201313: effective for PM2.5 control<\/li>\n<li>MERV 14\u201316: near-HEPA performance<\/li>\n<\/ul>\n<p>Limitation: MERV testing is conducted under dry conditions and does not reflect real-world performance under high humidity.<\/p>\n<h3>EN 779 (European Union \u2014 discontinued in 2018)<\/h3>\n<ul>\n<li>G1\u2013G4: coarse grades<\/li>\n<li>F5\u2013F9: fine grades, based on 0.4-micron efficiency<\/li>\n<\/ul>\n<p>Limitation: EN 779 does not directly reflect PM1, PM2.5, or PM10 control performance, and has been replaced by ISO 16890.<\/p>\n<h3>ISO 16890 (current international standard)<\/h3>\n<p>Classifies filters into ePM1, ePM2.5, ePM10, and Coarse groups based on efficiency at specific particle sizes:<\/p>\n<ul>\n<li>ePM1 \u2265 50%: approximately equivalent to F7<\/li>\n<li>ePM1 \u2265 70%: approximately equivalent to F8, meets LEED\/WELL requirements<\/li>\n<li>ePM1 \u2265 90%: approximately equivalent to F9, suited to server rooms, luxury hotels, and hospitals<\/li>\n<\/ul>\n<h2>2. Filter Recommendations by Building Type<\/h2>\n<table width=\"600\">\n<tbody>\n<tr>\n<td width=\"300\"><strong>Building Type<\/strong><\/td>\n<td width=\"300\"><strong>Recommended Filter<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"300\">Office buildings<\/td>\n<td width=\"300\">ePM2.5 \u2265 50% (F6\u2013F7), per ASHRAE 62.1<\/td>\n<\/tr>\n<tr>\n<td width=\"300\">LEED \/ WELL certified buildings<\/td>\n<td width=\"300\">ePM1 \u2265 70% (F8)<\/td>\n<\/tr>\n<tr>\n<td width=\"300\">4\u20135 star hotels<\/td>\n<td width=\"300\">ePM1 \u2265 80\u201390% (F8\u2013F9)<\/td>\n<\/tr>\n<tr>\n<td width=\"300\">Airports \/ shopping malls<\/td>\n<td width=\"300\">ePM2.5 \u2265 60\u201370% (F7\u2013F8)<\/td>\n<\/tr>\n<tr>\n<td width=\"300\">Data centers<\/td>\n<td width=\"300\">ePM1 \u2265 90% (F9)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<h2>3. Balancing Pressure Drop and Filtration Efficiency<\/h2>\n<p>Higher filtration efficiency generally increases pressure drop and energy consumption. Building owners should weigh:<\/p>\n<ul>\n<li>Electricity cost associated with fan energy consumption<\/li>\n<li>ASHRAE, LEED, and WELL certification requirements<\/li>\n<li>Filter replacement cycle (typically 3\u201312 months)<\/li>\n<li>AHU fan and motor efficiency (EC motor vs. standard AC motor)<\/li>\n<\/ul>\n<p>Air Filtech offers Life Cycle Cost Analysis (LCCA) to help building owners select the most cost-effective filtration strategy over the system&#8217;s lifetime.<\/p>\n<h2>4. Air Filtech AHU Solutions<\/h2>\n<ul>\n<li>Compact Filter F6\/F7 (ePM2.5 \u2265 50\u201365%)<\/li>\n<li>Pocket Filter F7\/F8\/F9 (ePM1 \u2265 50\u201390%)<\/li>\n<li>Rigid V-Bank Filter F9<\/li>\n<li>Activated carbon pre-filters for VOC and odor control<\/li>\n<\/ul>\n<h2>5. Featured Projects<\/h2>\n<ul>\n<li>Vincom Center \u0110\u1ed3ng Kh\u1edfi (Ho Chi Minh City) \u2014 Pocket Filter F8 for mall and basement AHU systems<\/li>\n<li>Sofitel Saigon Plaza \u2014 F9 filters for guest room and lobby AHU systems<\/li>\n<li>Landmark 81 (Ho Chi Minh City) \u2014 full-tower HVAC filtration consulting and supply<\/li>\n<\/ul>\n<p><em>Contact Air Filtech: 08 999 44 666 | info@airfiltech.vn<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Going green and reducing your carbon footprint are important steps towards creating a more sustainable future for our planet. There are many simple changes that you can make in your daily life that can have a significant impact on reducing your carbon footprint and helping the environment.<\/p>\n","protected":false},"author":1,"featured_media":9447,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[342],"tags":[362,361,365,366,367,364,363,368],"class_list":["post-9436","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-commercial-public-buildings","tag-ahu","tag-commercial-building","tag-en-779","tag-epm1","tag-hvac","tag-iso-1689","tag-merv","tag-pocket-filter"],"acf":[],"_links":{"self":[{"href":"https:\/\/airfiltech.vn\/en\/wp-json\/wp\/v2\/posts\/9436","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/airfiltech.vn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/airfiltech.vn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/airfiltech.vn\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/airfiltech.vn\/en\/wp-json\/wp\/v2\/comments?post=9436"}],"version-history":[{"count":2,"href":"https:\/\/airfiltech.vn\/en\/wp-json\/wp\/v2\/posts\/9436\/revisions"}],"predecessor-version":[{"id":9438,"href":"https:\/\/airfiltech.vn\/en\/wp-json\/wp\/v2\/posts\/9436\/revisions\/9438"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/airfiltech.vn\/en\/wp-json\/wp\/v2\/media\/9447"}],"wp:attachment":[{"href":"https:\/\/airfiltech.vn\/en\/wp-json\/wp\/v2\/media?parent=9436"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/airfiltech.vn\/en\/wp-json\/wp\/v2\/categories?post=9436"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/airfiltech.vn\/en\/wp-json\/wp\/v2\/tags?post=9436"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}