Spiral Ducts Rectangular Ducts Accessories Diffusers, Plenums and others

Welcome to YLLITERM - HVAC Ducting & Ventilation Components for Professionals

YLLITERM is a specialized manufacturer of HVAC ducts, components, and air distribution solutions, serving professionals across the ventilation industry. We work exclusively in the B2B sector, supporting installers, project designers, and engineers with reliable products and technical expertise tailored to demanding project requirements.


Our production is focused on precision, consistency, and compliance with industry standards. From rectangular and circular duct systems to custom components and diffusers, we deliver solutions designed for efficient installation and long-term performance. Every product is manufactured with attention to detail, ensuring durability, airtightness, and optimal system functionality.


Beyond manufacturing, YLLITERM acts as a technical partner throughout the project lifecycle. We provide consultation, practical recommendations, and engineering support to help optimize system design, simplify installation, and ensure regulatory compliance. Our team understands the challenges faced on-site and in planning phases, allowing us to deliver solutions that work in real conditions.


We continuously invest in modern production technologies and process improvements to meet the evolving needs of the HVAC industry. Whether for large-scale commercial developments or specialized technical projects, YLLITERM is committed to delivering dependable products, short lead times, and consistent quality.


Partner with YLLITERM for efficient ventilation solutions built for professionals who demand precision, reliability, and expertise.