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: 279

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

Videos

  • Add Videos
  • View All

Twitter

Latest Activity

Profile IconPaul J Anzalone Jr, Jon Traudt and Jamie Medlin joined Home Energy Pros
3 hours ago
Jamie Medlin replied to angela stanzione's discussion Used Weatherization and auditing equipment for sale in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"Please let me know if the flowhood  still for sale. jmedlin@archonenergysolutions.com"
7 hours ago
Jamie Medlin joined allen p tanner's group
Thumbnail

Energy Auditing Equipment for Sale, Trade or to Purchase

Discuss the pros and cons of the equipment you are interested in prior to purchase. Post equipment…See More
7 hours ago
Laurie DiDonato posted an event
Thumbnail

HERS Rater Training Discount: Register by 1/6/17 and Get $100 Off! at Energize CT Center, North Haven, CT

January 23, 2017 to February 3, 2017
Become a HERS Rater with the NEHERS Alliance!Online Component: January 23rd-February 3rd, 2017 -…See More
9 hours ago
angela stanzione replied to angela stanzione's discussion Used Weatherization and auditing equipment for sale in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"Yes, I do. Pictures are above. I have a newer fan, I have a frame in a case and I have panels."
10 hours ago
Tom Phillips replied to Bruce Ceniceros's discussion How effective are whole house air cleaners?
"re: costs:  I suspect the added UV & PCO & ESP has a big price tag but no clear…"
yesterday
David Baerg replied to angela stanzione's discussion Used Weatherization and auditing equipment for sale in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"Hi Angela, Do you have any fans left?  Frames?  Panels? Thanks, Dave"
yesterday
Hannah Wood joined Leslie McDowell, BPI's group
Thumbnail

Building Performance Institute (BPI)

BPI is the nation's premier standards development, quality assurance and credentialing organization…See More
yesterday

© 2016   Created by Lawrence Berkeley National Laboratory.   Powered by

Badges  |  Report an Issue  |  Terms of Service