Your before-test result is 4000 CFM50. After two days of work, you measure a 21% reduction to 3150 CFM 50. Your after-test is checked using another blower door and they only get a 4% reduction to 3850 CFM50! What gives?

Retrotec CEO, Colin Genges gives his monthly Rants and Raves, see article below:

 

http://retrotec.com/RetrotecBlog/tabid/540/post/colin-rants-before-...

Views: 240

Reply to This

Replies to This Discussion

Good job putting up this post.It puts a better view on accurcy.I watched a video of a guy who had some serious time in this field and he says we should do 10 individual single point tests -EVERY TIME?.I think this puts that in perspective.

Appreciate the feedback William.  The piece comes from our newsletter, if you're not on the list and want to get on, just let me know. Thanks.

RSS

Home Energy Pros

Home Energy Pros was founded by the developers of Home Energy Saver Pro (sponsored by the U.S. Department of Energy,) and brought to you in partnership with Home Energy magazine.

Latest Activity

Hal Skinner replied to Hal Skinner's discussion How much heat energy is lost through the floor of a house?
"II just remembered seeing a report by a federal adency, many years ago, that basically said …"
2 hours ago
Don Fitchett commented on Tom White's video
Thumbnail

Alliant Energy's PowerHouse TV: Sealing Leaky Ductwork

"Very educational. thanks for sharing Tom."
5 hours ago
Hal Skinner posted a discussion

How much heat energy is lost through the floor of a house?

I am asking this as I do not recall anyone speaking of any study to this end.  Many comments about…See More
5 hours ago

Mike Braun just added their location.
(via Member Map)

6 hours ago
Bud Poll replied to Bud Poll's discussion Another benefit from air sealing
"From my work in NY City many years ago, the critters I saw would never have fit through a quarter…"
10 hours ago
Barbara Smith replied to Bud Poll's discussion Another benefit from air sealing
"Eliminating quarter sized holes can impede rats from entering a building, in areas where rats tend…"
10 hours ago
Casey Murphy is now a member of Home Energy Pros
11 hours ago
Walter Ahlgrim replied to James White's discussion What happened to Home Energy Pro's website?
"Try downloading Google Chrome web browser https://www.google.com/chrome/browser/ I had similar…"
yesterday

© 2014   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service