{"id":4177,"date":"2023-06-20T10:00:00","date_gmt":"2023-06-20T09:00:00","guid":{"rendered":"https:\/\/www.bcta.group\/attma\/?p=4177"},"modified":"2023-06-08T15:19:08","modified_gmt":"2023-06-08T14:19:08","slug":"technical-update-to-tsl4","status":"publish","type":"post","link":"https:\/\/www.bcta.group\/attma\/2023\/technical-update-to-tsl4\/","title":{"rendered":"Technical Update to TSL4"},"content":{"rendered":"\n<p>The Air Tightness Testing and Measurement Association, ATTMA, has released an update to ATTMA Technical Standard L4 (TSL4) &#8211; Measuring Air Permeability in Passivhaus &amp; Low Energy Buildings &#8211; Fan Pressurisation Method.<\/p>\n\n\n\n<p>This minor update amends the changes to the <a href=\"https:\/\/aecb.net\/\" target=\"_blank\" rel=\"noopener\">AECB<\/a> building standard by providing details on the 3 levels that are now in the standard. This can be found on Table 1 on Page 5 and as seen below<\/p>\n\n\n\n<p>[su_table]<table> <tbody><tr> <td><strong>Ventilation Strategy<\/strong><\/td> <td><strong>Target Air Change Rate N50<\/strong><\/td> <\/tr> <tr> <td>Passivhaus Standard<\/td> <td>\u22640.6<\/td> <\/tr> <tr> <td>EnerPHIT Standard<\/td> <td>\u22641.0<\/td> <\/tr> <tr> <td>PHI Low Energy Building<\/td> <td>\u22641.0<\/td> <\/tr> <tr> <td>AECB CarbonLite Standard Level 1<\/td> <td>\u22645.0<\/td> <\/tr> <tr> <td>AECB CarbonLite Standard Level 2<\/td> <td>\u22642.0<\/td> <\/tr> <tr> <td>AECB CarbonLite Standard Level 3<\/td> <td>\u22641.5<\/td> <\/tr> <\/tbody><\/table>[\/su_table]<\/p>\n\n\n\n<p>The updated standard can now be <a href=\"https:\/\/www.bcta.group\/attma\/download\/attma-technical-standard-l4-tsl4-measuring-air-permeability-in-passivhaus-low-energy-buildings-fan-pressurisation-method-issue-2-0\/\">downloaded through the ATTMA website<\/a>, and has also been updated in the <a href=\"https:\/\/www.bcta.group\/attma\/download\/attma-technical-standards-combined\/\">combined technical standard folde<\/a>r.<\/p>\n\n\n\n<p>If you have any queries, contact Paul Carling, ATTMA Technical Manager on paul@bcta.group or 01494 358 159<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The Air Tightness Testing and Measurement Association, ATTMA, has released an update to ATTMA Technical Standard L4 (TSL4) &#8211; Measuring<\/p>\n","protected":false},"author":3,"featured_media":4179,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[29],"tags":[],"class_list":["post-4177","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"publishpress_future_action":{"enabled":false,"date":"2026-05-07 09:01:19","action":"change-status","newStatus":"draft","terms":[],"taxonomy":"category","extraData":[]},"publishpress_future_workflow_manual_trigger":{"enabledWorkflows":[]},"_links":{"self":[{"href":"https:\/\/www.bcta.group\/attma\/wp-json\/wp\/v2\/posts\/4177","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bcta.group\/attma\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bcta.group\/attma\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bcta.group\/attma\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bcta.group\/attma\/wp-json\/wp\/v2\/comments?post=4177"}],"version-history":[{"count":3,"href":"https:\/\/www.bcta.group\/attma\/wp-json\/wp\/v2\/posts\/4177\/revisions"}],"predecessor-version":[{"id":4181,"href":"https:\/\/www.bcta.group\/attma\/wp-json\/wp\/v2\/posts\/4177\/revisions\/4181"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bcta.group\/attma\/wp-json\/wp\/v2\/media\/4179"}],"wp:attachment":[{"href":"https:\/\/www.bcta.group\/attma\/wp-json\/wp\/v2\/media?parent=4177"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bcta.group\/attma\/wp-json\/wp\/v2\/categories?post=4177"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bcta.group\/attma\/wp-json\/wp\/v2\/tags?post=4177"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}