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: 123

Comment

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

Join Home Energy Pros

Videos

  • Add Videos
  • View All

Twitter

Latest Activity

Ed Minch commented on Tom White's video
Thumbnail

Measured Home Performance: Assessment with a Infrared Camera

"I find it best to scan one time before the Blower Door is used to check for insulation and…"
yesterday
Profile IconLarry Kinney and teplie_poly joined Home Energy Pros
yesterday
Dan Antonioli replied to Dan Antonioli's discussion Net Zero Energy Hot Water
"Okay, a couple of things. The 1.0 kW per square meter reference is only under the most ideal lab…"
yesterday
Hans Joachim Preiss replied to Dan Antonioli's discussion Net Zero Energy Hot Water
"Dan, Let me attempt to compare apples with apples: My solar thermal system is located in…"
yesterday
Dan Antonioli replied to Dan Antonioli's discussion Net Zero Energy Hot Water
"Hi Hans, I don't know where you're located but where I am a 2.5 kw pv system costs closer…"
Friday
Hans Joachim Preiss replied to Dan Antonioli's discussion Net Zero Energy Hot Water
"I use the combination of solar PV and heatpump water heaters in the vast majority of net-zero…"
Friday
Amber Vignieri posted a blog post
Friday
William Zwack added a discussion to the group Job Board
Thumbnail

Residental Energy Specialist: Washington, DC (or possibly telework)

Position Summary: CSRA Incorporated is searching for a Sr. Residential Building Energy Efficiency…See More
Friday

© 2016   Created by Lawrence Berkeley National Laboratory.   Powered by

Badges  |  Report an Issue  |  Terms of Service