AAF International's clean air products and systems offer the most comprehensive clean air solutions available in the world. Its products are the industry benchmarks for quality and performance, from simple roughing filters to air pollution control, to gas containment removal, to the highest efficiency filters used in the most stringent clean environments.

Halton Group is a family-owned, global technology pioneer in indoor air solutions for demanding spaces. They enable safe, comfortable, and productive indoor environments that are energy-efficient and comply with sustainable principles.

Harshaw Trane creates and sustains high performing, efficient and secure facility environments. They partner with many of the top-ranked private and public institutions on innovative technology and systems that optimize performance while minimizing energy use and reducing costs over the entire lifecycle of a building.

Hughes Environmental helps their customers to create safe and clean work environments by providing quality commercial duct cleaning, rafter and ceiling cleaning, and combustible dust remediation services.