Using a few large ducts instead of many small ducts to reduce total exposed surface area.

Does it make much of a difference to use fewer large ducts instead of several smaller ones coming from the air handler? IMHO the "trunk/branch" type setup has substantially less losses than a "spider" type duct arrangement because the Trunk/Branch has less surface area exposed to the attic temperatures. Is this true or does it not really make much difference?

Views: 25

Reply to This

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

Ben Jacobs replied to Mike Kandel's discussion Have you heard!? BPI's BSP Certificate Approved as Home Energy Score Prerequisite!
"I am very pleased to see the collaboration between the Building Performance Institute (BPI) and the…"
1 hour ago
Profile IconComly Wilson, Pete Stoermer, Billy Ray Griffin and 1 more joined Home Energy Pros
1 hour ago
Stan Kuhn replied to Mike Kandel's discussion Have you heard!? BPI's BSP Certificate Approved as Home Energy Score Prerequisite in the group Building Performance Institute (BPI)
"Mike, are there any statistics on the number of HES ratings performed, by all providers?"
4 hours ago
Mike Kandel added a discussion to the group Building Performance Institute (BPI)
Thumbnail

Have you heard!? BPI's BSP Certificate Approved as Home Energy Score Prerequisite

The Building Performance Institute's Building Science Principles (BSP) Certificate of Knowledge has…See More
4 hours ago
Mike Kandel posted a discussion

Have you heard!? BPI's BSP Certificate Approved as Home Energy Score Prerequisite!

The Building Performance Institute's Building Science Principles (BSP) Certificate of Knowledge has…See More
4 hours ago
Shawna Henderson posted a status
"New Blog Post @HomeEnergyMag Why I like Dumb, Do-Nothing Houses http://shar.es/1WSOIX"
5 hours ago
Larry Gorman posted a discussion

Hobo Data loggers for sale

I have recently retired and no longer have need of these, which are all in like new condition.  I…See More
6 hours ago
Laurel Elam posted a blog post

Over 146,000 Homes in the U.S. were HERS Rated and issued a HERS Index Score in 2014

In 2014 there were 146,860 homes in the United States that were energy rated by certified RESNET…See More
7 hours ago

© 2015   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service