03-01-2017, 07:05 PM
A microwave is a fundamentally simple device...a magnetron, a fan, a turntable motor, a few microswitches and a circuit board/display. It isn't going to produce huge amounts of hot air that needs venting. IMHO, many appliances have excessive clearance/venting specs and overkill safety warnings that are based on worst-case scenarios, abundances of caution, and too many corporate lawyers.