What does this mean? How can we get to zero duct leakage?

 

When the testing equipment is not small enough to accurately measure the leakage - then it is called zero - usually below 10 CFM of leakage.

Essentially every seam of all the metal and every inside connection of the inner sleeves of flex duct has to have duct mastic at least the thickness of a nickel. This is actually per the Building America Practices Guides.

 

I have not had enough time to put together the video footage of this type of work being done in action yet - but will do so for the series.

Yes this is possible to consistently get zero duct leakage and there are contractors in Nevada and California that install these systems one after the next. They even have a club called the "Ring 4 Club" or something like that - meaning the duct blaster needs a 4th ring to actually measure how low the leakage is - if it even could. --There is no such thing as a 4th ring by the way.

------

To tune in to the Super Efficeint HVAC Series navigate here and add a user name and desired password at the top right hand corner and then fill out the minimal form on the next page.

 

Views: 105

Comment

You need to be a member of Home Energy Pros to add comments!

Join Home Energy Pros

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

Mike Kandel added a discussion to the group Building Performance Institute (BPI)
1 hour ago
Mike Kandel posted a discussion
1 hour ago
tedkidd commented on Scott Mellberg's blog post Lessons from Energy Efficiency Advisors: Getting Homeowners Onboard with Home Performance
"David,  Please think some of these things through.  If programs suck so much, how can…"
2 hours ago
Hannah Finch posted a blog post

Stump Duncan, Innovate with Colby, and Save on RaterFest! 2014

RaterFest! 2014 Speaker Spotlight!Presenter:  Duncan PrahlTopic: Duck, Ducks, and more Ducts…See More
2 hours ago
David Eakin commented on Scott Mellberg's blog post Lessons from Energy Efficiency Advisors: Getting Homeowners Onboard with Home Performance
"Consultation and education are all well and good, but we have found that the…"
2 hours ago
Kari Sauder commented on Scott Mellberg's blog post Lessons from Energy Efficiency Advisors: Getting Homeowners Onboard with Home Performance
"I just had a customer bail out of the whole house approach over the weekend.  It is a small…"
3 hours ago
Profile IconLOUIS ANDERSON and Jeremy Hargreaves joined Home Energy Pros
4 hours ago
Ramon Aguirre replied to Tom Conlon's discussion Whole House Fans - Love 'Em or Not?
"Whole house fan basically serves the purpose of exhaust fans. They are more cheaper than air…"
13 hours ago
Brandon Walton commented on Brandon Walton's photo
Thumbnail

2014-07-25 15.17.30

"While performing a QC it is always good to look inside the return.........."
21 hours ago
Brandon Walton posted a photo

2014-07-25 15.17.30

Supposed Sealed Return Chase
21 hours ago
Brandon Walton commented on Diane Chojnowski's group Facebook Pages
21 hours ago
Brandon Walton joined Diane Chojnowski's group
Thumbnail

Facebook Pages

Does your company or organization have a Facebook Page?This group is for pros who have facebook…See More
21 hours ago

© 2014   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service