Help Keep Boards Alive. Support us by going ad free today. See here: https://subscriptions.boards.ie/.

https://www.boards.ie/group/1878-subscribers-forum

Private Group for paid up members of Boards.ie. Join the club.

Hi all, please see this major site announcement: https://www.boards.ie/discussion/2058427594/boards-ie-2026

U Value Question

16-05-2013 01:35AM

#1

Atlantic1

Registered Users, Registered Users 2 Posts: 368 ✭✭

Join Date: March 2009

Posts: 308

If you reduce the U Value of an external wall from 2.0 to 0.25, does that mean that it will take 8 times longer for heat to escape through the wall?

0

Comments

#2 16-05-2013 08:21AM

sinnerboy

Closed Accounts Posts: 5,433 ✭✭✭

Join Date: October 2007

Posts: 5071

U value measures the flow of heat per square meter per degree in temperature difference. It does not measure speed of heat flow as such.

So 0.25 from 2.0 means 8 times less heat will flow per per square meter per degree in temperature difference.

0
#3 16-05-2013 10:27AM

Atlantic1

Registered Users, Registered Users 2 Posts: 368 ✭✭

Join Date: March 2009

Posts: 308

Thanks.

0