Alertis holds BOSEC certificate B-9066-FD and puts fire detection at the front of its own offering rather than behind intruder alarm, which is unusual among Belgian installers of its size. It reports more than a thousand installations a year and six thousand seven hundred systems under maintenance contract, working from Roeselare with further offices at Lummen in Limburg and Merelbeke near Ghent, and also designs and installs gas and intruder detection.