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: 125

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

Tom White posted a discussion

Home Energy Reader Survey

Home Energy wants to serve you better.  Please …See More
18 hours ago
George Matthews's event was featured

Proof is Possible Tour by the Home Performance Workshop at Truitt and White Lumber Conference Room

October 7, 2016 from 9am to 1pm
Building Energy Performance Testing is sponsoring the Proof is Possible Tour to come to the San…See More
yesterday
Profile IconAshley Noreuil, Fred Smith and Peter Moncada joined Home Energy Pros
yesterday
George Matthews commented on George Matthews's event Proof is Possible Tour by the Home Performance Workshop
"Here is the flyer for the Advanced Techniques and Tools in Home Performance Friday October 7th at…"
yesterday
George Matthews posted an event

Proof is Possible Tour by the Home Performance Workshop at Truitt and White Lumber Conference Room

October 7, 2016 from 9am to 1pm
Building Energy Performance Testing is sponsoring the Proof is Possible Tour to come to the San…See More
yesterday
George Matthews replied to George Matthews's discussion Shortridge 8400 Flowhood for A/C airflow testing in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"Here are the pics of the flowhood and airdata manometer"
Saturday
Sarah Holloway posted a photo
Friday
Joe Urycki added a discussion to the group Energy Auditing Equipment for Sale, Trade or to Purchase
Thumbnail

TEC blower door and UEI combustion analyzer for sale

For sale is one used TEC Minneapolis blower door system: Includes model 3 fan with rings A and B,…See More
Friday

© 2016   Created by Lawrence Berkeley National Laboratory.   Powered by

Badges  |  Report an Issue  |  Terms of Service