willbish Posted March 21, 2019 Share Posted March 21, 2019 Im getting bogged down in details again. The two windows on my (very) short-list are both tested as Class 3 Air tightness on the 4 class EN12207 scale. One of the windows is marketed as Passivhaus but not yet certified by the institute. Im wondering just how much difference will this make to my overall airtightness score. Aiming for <0.6ACH Has anyone out there with non certified windows achieved top marks on their airtightness test results? Link to comment Share on other sites More sharing options...
vivienz Posted March 21, 2019 Share Posted March 21, 2019 My windows are suitable for passive but not, AFAIK, certified as passive. The air test on my house prior to insulation and boarding was 0.25. Link to comment Share on other sites More sharing options...
willbish Posted March 21, 2019 Author Share Posted March 21, 2019 Thanks @vivienz Do you know what they scored on the EN12207 test? Link to comment Share on other sites More sharing options...
vivienz Posted March 22, 2019 Share Posted March 22, 2019 Looking at the supplier website, it's possible that they are certified as they are described as Passiv with a capital p. Not sure, though. here's a link to the tech section of their website. http://www.norrsken.co.uk/technical.php# Link to comment Share on other sites More sharing options...
lizzie Posted March 22, 2019 Share Posted March 22, 2019 14 hours ago, vivienz said: My windows are suitable for passive but not, AFAIK, certified as passive. The air test on my house prior to insulation and boarding was 0.25. WOW @vivienz is that the best air test on this forum! Fantastic result I must have missed it. Well done. 1 Link to comment Share on other sites More sharing options...
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