Interpreting readings

[ldapkus]

Originally Posted by jrivera

Conductivity of building materials---A material's thermal conductivity describes how much heat flows through a 1 inch thick by 1 foot square slab of that material each hour, when there is a 1-degree-Fahrenheit temperature difference between the slabs two surfaces. Thermal conductivity, denoted by the letter k, allow us to compare how well common building materials conduct heat.



Aluminum is the most common building material. Its thermal conductivity is more than five times greater than steel, 1000 times greater than wood, and 10,000 times greater than air. One square foot of steel, the next most conductive building material, conducts as much heat as 50 square feet of concrete, 200 square feet of wood, or 1000 square feet of glass wool, assuming all are the same thickness.

When very conductive materials are touching one another, heat flows rapidly through the building shell because even a small contact area can transfer heat rapidly. This phenomenom is called thermal bridging. It results in cold interior surfaces (such as aluminum window frames) during winter, and hot surfaces (such as west-facing masonry walls) during summer. Using less conductive gaskets, called thermal breaks, between conductive materials such as glass and steel reduces this heat flow.


Mic

Mic,
Thanks for finally setting everybody straight. You are the IR Man.

[John McKenna]

When a lady ask me if the AC was working... I told her that it was cooling very well... but I should have said it is removing heat... pick on that.

[John McKenna]

Originally Posted by jrivera

Conductivity of building materials---A material's thermal conductivity describes how much heat flows through a 1 inch thick by 1 foot square slab of that material each hour, when there is a 1-degree-Fahrenheit temperature difference between the slabs two surfaces. Thermal conductivity, denoted by the letter k, allow us to compare how well common building materials conduct heat.

Aluminum is the most common building material. Its thermal conductivity is more than five times greater than steel, 1000 times greater than wood, and 10,000 times greater than air. One square foot of steel, the next most conductive building material, conducts as much heat as 50 square feet of concrete, 200 square feet of wood, or 1000 square feet of glass wool, assuming all are the same thickness.

When very conductive materials are touching one another, heat flows rapidly through the building shell because even a small contact area can transfer heat rapidly. This phenomenom is called thermal bridging. It results in cold interior surfaces (such as aluminum window frames) during winter, and hot surfaces (such as west-facing masonry walls) during summer. Using less conductive gaskets, called thermal breaks, between conductive materials such as glass and steel reduces this heat flow.


Mic

...is called thermal bridging. It results in cold interior surfaces

I should have said like that.

[David A. Andersen]

Originally Posted by jmckenna1

When a lady ask me if the AC was working... I told her that it was cooling very well... but I should have said it is removing heat... pick on that.

Are you trying to pester me John?

[John McKenna]

Originally Posted by dandersen

Are you trying to pester me John?

I'm trying not to cross the red line... but it's hard... oh my... LOL