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.

In 2002 Alpine Home Air Products became the first company to sell heating, air conditioning and indoor air quality products online.

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.

MacLellan Integrated Services provides critical process cleaning services, process equipment and robotics maintenance, production line side support, sludge and wastewater management, HVAC and mechanical services and general facility maintenance. Their work environments include automotive, aerospace, and general industrial applications.