What is a U value?
Now often quoted in building or building part specification, a U-value is placed upon an assembly of components to rate how well that assemblage performs in terms of energy efficiency.
It is important to note that the U-value relates to the performance of the assemblage as a whole. For example, the U-value of a window unit will be calculated with reference to the glass panes, frame, sealants etc. and their performance as a whole.
The U-value gives a numeric rating of the amount of heat that passes through the building part, therefore the lower the value the better the energy efficiency.
If you enjoyed that post, then read these...
Peak Oil ~ what is it & what bearing does it have on green building? on April 27th, 2008
Peak Oil is a notional point in time.
VAT for barn convertors - Update March 2009 on March 8th, 2009
It's been a while since a VAT update so I thought I'd review the current position, especially in view of the pre-Christmas credit-crunch fuelled reduction...
Cleaning oak beams on November 29th, 2008
I wanted to minimise the use of steel in the building and I like the texture and appearance of untreated hard woods - that led...
Posted in Essential information |
