Yellon and Swegon started working together in 1999. Back then, it was about the development of the second-generation air handling unit in the GOLD series. After a successful launch, the products were able to live on for over 15 years. In 2014, work on the third generation air conditioning unit of the series started. The cooperation between Yellon and Swegon gained momentum and soon the upgraded units were added to the series.
In addition to a new high-efficiency counter current switch and a new integrated heating and cooling system on the inside, the outside was re-designed. Yellon has given the series a stricter design, focusing on quality and finishing for the smallest detail, adding new handles and a crisper colour – at Swegon, dark silver is now the new GOLD.