What is an air curtain Air curtain is used to install on the doorways, windows, or other openings. It generates strong airflow by a cross-flow or centrifugal fan to isolate the indoor air from the external environment. So it can effectively prevent air exchange and pests go inside while maintaining stable indoor temperatures, enhancing customer … ສືບຕໍ່ອ່ານ EC AIR CRACK VS. ac on curin: ອັນໃດທີ່ເຫມາະສົມສໍາລັບທຸລະກິດຂອງທ່ານ?