luke58 wrote:
How do i check the effectiveness of a new double glazed installation.

I have had old aluminium units taken out and new UPVC units fitted.

But the house feels colder this winter, even as its milder.

Do you mean you want to check the heat loss through just that one
window? This is quite tricky to do, and not really worthwhile.

The most significant source of heatloss when it comes to windows is
draughts. Is your new window draughty? Can you feel any draught with
your hand, especially when it is windy outside?


--
Grunff
http://www.greendoug.com - a forum for all things environmental