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 12:48 PM ET

Tags:

1 Answer

Select your preferred way to display the comments and click "Save settings" to activate your changes.
1.

Robert,
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
Posted Sep 2, 2011 12:56 PM ET

Other Questions in General questions

Insulation with best life expectancy and low embodied energy?

In Green building techniques | Asked by Mike AbiEzzi | Jan 19, 18

I’m interested in disconnecting from the grid

In Mechanicals | Asked by Steven McCarthy | Jan 18, 18

Insulation for interior walls

In Energy efficiency and durability | Asked by Scott Benson Climate Zone 7A | Jan 18, 18

Perfect Wall assembly

In Green building techniques | Asked by Rodrob15 | Jan 18, 18

Basement Insulation question

In Green products and materials | Asked by bullet0770 | Jan 17, 18
Register for a free account and join the conversation


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