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: 278

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

Rob Madden, Solar Home Broker replied to Rob Madden, Solar Home Broker's discussion Indoor Air Quality Monitors and Meters
"With a Foobot, are you able to recalibrate the sensors?  While I like the price and the…"
9 hours ago
Steve Mann replied to Steve Mann's discussion Eliminator EF400 Smoke Machine in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"Yes it is. Steve"
12 hours ago
Laurie DiDonato updated an event
Thumbnail

Become a HERS Rater with the NE HERS Alliance this fall! at Classroom Component at Energize Connecticut Center

September 19, 2016 at 9am to October 21, 2016 at 5pm
Online Component: September 19th-30th - Weekdays 9am-12pm5-Day Classroom/Field Training:October…See More
13 hours ago
Melissa Baldridge posted a discussion

IECC 2012 & 2015 Compliance & HRVs

 I’m failing IECC 2012 with the HRVs we’ve been using – Honeywell .  (See specs below that I…See More
14 hours ago
Chris Woods replied to Steve Mann's discussion Eliminator EF400 Smoke Machine in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"Is this still available?"
14 hours ago
Melissa Baldridge replied to Melissa Baldridge's discussion ENERGY STAR - Slab Insulation
"Thanks, John.  That's helpful.  And yes - I've seen projects with perimeter…"
14 hours ago
Jan Green commented on Diane Chojnowski's group Facebook Pages
"Great to see FB pages here!   "
15 hours ago
Brett Little replied to Rob Madden, Solar Home Broker's discussion Indoor Air Quality Monitors and Meters
"Great! Email me at Brett.Little@greenhomeinstitute.org"
17 hours ago

© 2016   Created by Lawrence Berkeley National Laboratory.   Powered by

Badges  |  Report an Issue  |  Terms of Service