Gas between the panes
We ensure our sealed units are as thermally efficient as possible using a warm-edge spacer, with better insulating properties that those used in most windows and Low-E glass which reflects heat back inside. We also fill the sealed units with Argon gas, which is much denser than air and a better insulator of heat, for better energy efficiency. While others will drill two small holes in their sealed unit and hand pump the argon in, this often allows in air so Everest’s are assembled by robots in rooms filled with argon to avoid this. It also means we never have to drill holes and risk the structural integrity and air tight seal.