It’s a video kind of week. This is a video about doing a blower door test. I’m sharing it because it’s the first video I’ve seen that actually walks you through the test. Basically, you get an idea of what is involved in a blower door test. As you will see there isn’t much to it.
The house in the video tested at 6.2 ACH50 (that means 6.2 air changes per hour at 50 pascals) which isn’t very good. It is however, very typical. The 2012 International energy code will require homes to be 3-5 ACH50 depending on climate. This is a new requirement, and will have a lot of contractors scratching their heads because they’ve never encountered the idea of air tight construction, let alone a blower door test.
If you watched the Passive House video from a few days ago, you may know that a Passive House starts at .6 ACH50, yes point six. Passive House is recognized for being aggressive on airtightness because it is part of the recipe for achieving deep energy efficiency.
If you aren’t following me on facebook yet, check out the little green ” f ” button on the right. Click the “like” button when you get there. I say that because I’m not much of a Facebook person and really didn’t have any idea how to follow anyone. I’m learning, with the help of a teenager, how to do facebook. If you follow me you will get the updates from what I post there, which is different than what I post here, except for this post, which is directly inspired by what I read there. Got it? Anyway, I try to update the facebook page with things I’m reading about and that I hope others will find interesting.
If you like pinterest (crack for visual people) follow me using the little green ” p ” button on the right. I have boards on passive house, net-zero energy homes, small houses and architecture that you might find interesting. Also, some other boards that might not appeal. Knitting anyone?