Abstract: A computerised method for estimating air flow within a ventilated room comprising a plurality of air supply units configured to supply air to a plurality of vents arranged across a floor of the room over an air supply plenum, the method comprising the steps of: i) identifying a vent having a minimum distance to any one of the air supply units; ii) for each of a selected number of the air supply units, calculating a contribution of air flow supplied to the identified vent from a sum of ratios of distances between the identified vent and each of the air supply units; and iii) repeating step ii) for a vent having a next minimum distance to any one of the air supply units until a contribution of air flow for each of the plurality of vents is calculated.

Abstract: A removable vent (1) for an air ventilation system, the vent comprising: a frame (2) configured to allow the vent to be removably mounted within an opening; a grille (3) configured to allow the passage of air through the vent from a first face to a second opposing face; and a passive air flow diverter (4, 5) extending beyond the first face (7) of the vent and configured to redirect air flowing laterally across the first face to flow through the vent.

Abstract: A temperature-controllable equipment enclosure (110) comprising: an air inlet (113) having an inlet fan (228) arranged to supply air into the enclosure from an external environment through the air inlet to provide a positive air pressure within the enclosure when enabled; an air outlet (150); a conduit (125) extending between the outlet and an equipment cabinet (121) within the internal volume (115) of the enclosure; and an exhaust fan (127) arranged to drive air through the cabinet and conduit towards the outlet, wherein the conduit comprises an air bypass (240) connecting the internal volume of the enclosure with the interior of the conduit, such that air driven by the exhaust fan through the conduit is recirculated within the internal volume of the enclosure when the inlet fan is disabled and is exhausted from the enclosure through the air outlet when the air inlet fan is enabled.