Hans Göran Gunnar Sevefelt

Eldon AB manufactures and trades electrical components. Its products include enclosures, switchgear, electronic, and electrical distribution systems. The firm also provides solutions for protecting electrical, electronic, and data & communications products. The company was founded by Karin Randholm and Josef Randholm in 1922 and is headquartered in Västerås, Sweden.

Acticon AB supplies of ventilation products for residences and commercial kitchens. Its products include residential ventilation, kitchen ventilation. The company is headquartered in Bankeryd, Sweden.

LA Leif Arvidsson AB supplies building materials to companies that work with window renovation. Its products are sealing strips, sealants, window putties, fittings, clamp protection, window valves, wall valves, tools, and machines. The firm also offers training mainly with a focus on window renovation, woodworking, jointing, as well as sealing and ventilation technology. The company was founded by Leif Arvidsson in 1983 and is headquartered in Mullsjo, Sweden.

Hagab Industri AB develops and manufactures products and solutions for fire protection and ventilation. The Swedish company's products include fire dampers, gas dampers, backflow protection, and control and monitoring of fire protection. The private company is known for providing safe and efficient fire protection solutions. Hagab Industri is an unconventional ventilation company that offers general sales conditions unless otherwise agreed upon.