The Ruba (루바) by Sunil Engineering is designed to improve air circulation within building and construction environments, contributing to pollution prevention efforts. Sunil Engineering specializes in producing diffusers, grilles, dampers, and related air circulation devices for such applications. The company has achieved industry-first certifications like the Korean Industrial Standards Mark (KS) and Quality Assurance (Q) certifications, and is ISO9001-certified, emphasizing their commitment to quality and customer satisfaction.