Air spaces stuffed with Argon or Krypton gas. These inert gases are denser than air, giving far better insulation. The amplified density lowers the amount of heat which can go through the window, boosting Total thermal overall performance. This suggests you may match your secondary double-glazing set up about your https://outdoorsecuritylights95802.blogsumer.com/26126260/the-fact-about-slimline-secondary-glazing-shepherd-s-bush-that-no-one-is-suggesting