Abstract: The ventilation regulation system comprises a ventilation duct including a ventilation opening through a separating wall of the ventilation duct. An air regulation apparatus is provided within the ventilation opening for regulating the air flow therethrough, and comprises a modular air regulation drum member that has a number of rotatable drum segments that can each rotate to adjustably block or deflect the air flow through the ventilation opening such that at least one among the direction, the speed and the debit rate of air is controlled through the ventilation opening. A mechanical coupling mechanically links the drum segments of the drum member into a coordinated rotational movement. An actuator acting on at least one, but not all, of the drum segments of the drum member, rotates one of the drum segments, with the mechanical coupling allowing all drum segments to be rotated when that one drum segment is rotated.

Abstract: The air purifying apparatus comprises a purifying chamber comprising a peripheral wall that has an air inlet and an air outlet. A UV light source is located within an irradiation portion of the purifying chamber. An air channel extends between the air inlet and the air outlet for allowing the air to flow therein. A main baffle plate is fixed within the purifying chamber downstream of the air inlet and upstream of the air outlet such that the air channel will be formed about the main baffle plate, the main baffle plate comprising a UV-reflective surface in register with the UV light source and that is tangentially oriented at least partly upstream to reflect at least part of the UV light emitted by the UV light source upstream in the air channel. Also, the air channel has a wider cross-sectional area at its irradiation portion than at the air inlet, for decreasing the speed of the air flowing through the air channel which increases the time during which air particles will be exposed to the UV light source.