We have had a few customers who have wanted to place their Arclamp drivers near to one another or in a central location. This has raised concerns about heat dissipation.
Arc lamp driver is force air cooled and is designed to be wall mounted. It does not need to be installed in an enclosure. If customers want to mount them next to each other then they should have a couple of inches between as a minimum.
Air is pulled in through the back of the driver (driver stands off the wall by a few mm) and is then vented out through the front of the unit to cool it. It is important this airflow is not blocked.