0 Helpful?

Energy flow

So the 3 fmethods of energy flow - Radiant, conduction, and convection.

Is there data that show heat loss or gains through the different part of the structure, ie walls, ceiling, basement floor broken down by heat flow method.

On top of that is there anything showing the walls and cieling with different type of insulation. I realize that iy id noy going to be consistent across all homes.

Asked by Robert Hronek
Posted Sep 2, 2011 1:48 PM ET


1 Answer

Select your preferred way to display the comments and click "Save settings" to activate your changes.

Your question is impossible to answer. When the Delta-T is high, there is a lot of radiant heat flow through an uninsulated wall; however, once the wall is well insulated, there isn't much radiation.

So, the answer is: it depends.

Frankly, though, it doesn't matter. If you address air leakage and provide high levels of insulation, you're good to go. Don't worry about how the heat is flowing.

The only time radiation matters is when a building assembly lacks insulation. The classic example: a sloping roof assembly over an unconditioned vented attic in a hot climate. That type of assembly can benefit from a radiant barrier, especially if there is ductwork in the attic.

Answered by Martin Holladay, GBA Advisor
Posted Sep 2, 2011 1:56 PM ET

Other Questions in General questions

Duct Blaster testing

In General questions | Asked by David Schreiber | Oct 27, 16

Air sealing attic: materials and fire safety

In Energy efficiency and durability | Asked by Sam Smith | Oct 25, 16

Sun Bandit solar water heater

In Green products and materials | Asked by Scott Wilson | Oct 21, 16

While I love radiators, I hate using fossil fuels

In Energy efficiency and durability | Asked by Susan Hanway | Aug 28, 16

What causes a bathroom vent fan to drip water?

In Mechanicals | Asked by Steve Mindel | Oct 26, 16
Register for a free account and join the conversation

Get a free account and join the conversation!
Become a GBA PRO!