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: 22

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

Bud Poll replied to richard gaughan's discussion Advice for heating a 3-story Vermont home built in 1900?
"To add to Richards list of what might have"
9 minutes ago
Hal Skinner replied to richard gaughan's discussion Advice for heating a 3-story Vermont home built in 1900?
"Hi Richard. If we are talking a circa 1900 home, is there any insulation in the walls at all? …"
50 minutes ago
David Meiland replied to richard gaughan's discussion Advice for heating a 3-story Vermont home built in 1900?
"Bud is right on. Get a professional auditor to assess the building. Finding the right person may…"
1 hour ago
Bud Poll replied to richard gaughan's discussion Advice for heating a 3-story Vermont home built in 1900?
"Hi Richard, Being a science writer and this being rental units, here is a moral dilemma you…"
5 hours ago
richard gaughan posted a discussion

Advice for heating a 3-story Vermont home built in 1900?

I'm a science writer, as opposed to an energy professional, and I joined this group to try to keep…See More
9 hours ago
Christopher Talarico posted a discussion

Heating with Tankless Water Heater & Hydronic Air Handler vs. Gas Furnace

Hi,I've looked around online and haven't found a lot of good information on home heating with…See More
19 hours ago
Profile IconSara Sabol, Christopher Talarico and Aaren Stewart joined Home Energy Pros
22 hours ago
Hal Skinner replied to Andy Gostisha's discussion Disguising Ductless Heat Pump Units
"Hi Andy. The bare metal units on a roof stick out like a sore thumb .  Coating them with our…"
22 hours ago

© 2014   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service