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

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, GBA Advisor
Posted Sep 2, 2011 1:56 PM ET

Other Questions in General questions

Continuous insulation under slab

In Building Code Questions | Asked by Adam Smerchanski | May 2, 16

Pond pebbles instead of crushed gravel for the driveway - what to do?

In General questions | Asked by Lucyna de Barbaro | Apr 30, 16

Exterior rigid foam and re-siding project...

In Energy efficiency and durability | Asked by Howard Gentler | May 2, 16

Insulation and air conditioning

In Energy efficiency and durability | Asked by Kevin Gabbard | May 1, 16

High humidity in spray foam attic

In General questions | Asked by Nic Smith | Apr 30, 16
Register for a free account and join the conversation


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