At Ameristar, we pride ourselves in manufacturing and installing vinyl replacement windows and patio door product lines that meet the highest energy-saving standards. Our Dura Platform spacer system traps air in sealed, insulated chambers much like the compartments designed into high-performance PVC profiles. These insulating pillows of air reduce energy loss through the spacer, improving condensation resistance and energy efficiency of the window by up to 10%. Dura Platform spacers reduce energy loss when heating and cooling homes thus also reducing the amount of carbon dioxide created and the impact on the environment.