{"id":718,"date":"2019-04-01T14:35:06","date_gmt":"2019-04-01T14:35:06","guid":{"rendered":"https:\/\/www.bcta.group\/attma\/?p=718"},"modified":"2019-04-08T15:36:26","modified_gmt":"2019-04-08T15:36:26","slug":"melbourne-passive-house-icebox-challenge","status":"publish","type":"post","link":"https:\/\/www.bcta.group\/attma\/2019\/melbourne-passive-house-icebox-challenge\/","title":{"rendered":"Melbourne Passive House IceBox Challenge"},"content":{"rendered":"\n

ATTMA is delighted with the results of The Melbourne Passive House IceBox Challenge, which was a contest run by the Australian Passive House Association<\/a>. It ran for 12 days from 20th<\/sup> February to 3rd<\/sup> March 2019. The challenge was also a public science demonstration that showcases the benefits of a high-performance building.<\/p>\n\n\n\n

What is the IceBox Challenge?<\/strong><\/p>\n\n\n\n

The IceBox Challenge comprised of two small structures that were filled with 720 kilograms of ice. The two small structures were identical in size but built to difference specifications. One was built in accordance with the Australian Building Code and the other was built to the super-insulated Passive House Standard. Each box was left outside in the summer sun for 12 days and at the end, both boxes were opened. The amount of ice left in each box indicated how well each structure kept out the summer heat.<\/p>\n\n\n\n

\"\"\/<\/figure><\/div>\n\n\n\n

Passive House buildings and Air Tightness<\/strong><\/p>\n\n\n\n

Passive House buildings have more insulation, triple pane\nwindows and betting air sealing than conventional buildings. They are also\nconstruction differently as junctions in the envelope area are carefully\ndesigned to avoid any thermal bridging, air leakage or any drafts. Passive\nHouse\u2019s are extremely airtight and could be up to 25 times more airtight than a\nBuilding Code house. The performance target for Passive Houses are \u2264 0.6 air\nchanges\/ hr @ n50. <\/p>\n\n\n\n

Whilst the building is extremely air tight, with very\nminimal gaps in the envelope, the ventilation system supplies controlled\nprovisions of fresh air without making any draughts. This also means very high-quality\nair throughout the building. Plant growth is known the flourish which is\ndefinitely a sign that the air quality is high. <\/p>\n\n\n\n

The Result <\/strong><\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

During the experiment, the boxes were exposed to some\nextreme temperatures with the maximum air temperature outside of 39.8\u00b0C. The\nPassive House box was consistently 10\u00b0C cooler than outdoors where the Building\nCode box was rarely more the 5\u00b0C cooler.<\/p>\n\n\n\n

The result of the challenge that all the ice in the\nAustralian Building Code was all melted by day 10, whereas in the Passive House\nbox, there was a huge 143kg of ice left, due to the construction detail and an\nairtight membrane which limited the heat gain in the box.  <\/p>\n\n\n\n

Text and Photo Credit: Australian Passive House Association
https:\/\/passivehouseaustralia.org\/iceboxchallengemelbourne\/<\/a>
<\/p>\n","protected":false},"excerpt":{"rendered":"

ATTMA is delighted with the results of The Melbourne Passive House IceBox Challenge, which was a contest run by the<\/p>\n","protected":false},"author":3,"featured_media":727,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[29],"tags":[37,39,48,41,42],"class_list":["post-718","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-airtightnesstesting","tag-australia","tag-melbourne","tag-passive-house","tag-passivhaus"],"publishpress_future_action":{"enabled":false,"date":"2026-05-01 10:04:40","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\/718","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=718"}],"version-history":[{"count":5,"href":"https:\/\/www.bcta.group\/attma\/wp-json\/wp\/v2\/posts\/718\/revisions"}],"predecessor-version":[{"id":728,"href":"https:\/\/www.bcta.group\/attma\/wp-json\/wp\/v2\/posts\/718\/revisions\/728"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bcta.group\/attma\/wp-json\/wp\/v2\/media\/727"}],"wp:attachment":[{"href":"https:\/\/www.bcta.group\/attma\/wp-json\/wp\/v2\/media?parent=718"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bcta.group\/attma\/wp-json\/wp\/v2\/categories?post=718"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bcta.group\/attma\/wp-json\/wp\/v2\/tags?post=718"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}