How much clearance around the sides is needed for a White Knight compact tumble dryer?

Answer 1

These dryers are advertised as CE Marked, which is the Canadian equivalent of UL in the States. They advertise a free vent kit, so, presumably, with the vent installed you would have "Zero clearance to combustible materials", or flush to any surface except floor (because of leveling requirements).

To be certain, you should contact the manufacturer direct, even if you have purchased the product used.