Abstract: An air filter (111) comprising a duct (118, 120) forming a passageway extending between an inlet (116) and an outlet (113) of the air filter, the duct comprising bristles (310) extending from a wall of the duct across at least a portion of the passageway so as to remove entrained particles from air passing through the duct.

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.

Abstract: A diffusion-absorption refrigerator system (1) comprising a condenser pipe (6) passing through and surrounded by a heatsink (2), the heatsink comprising a sealed enclosure defining an internal cavity surrounding the condenser pipe for containing a heat transfer liquid, a cross-section of the heatsink transverse the condenser pipe tapering to a minimum thickness towards an upper end when oriented for use of the refrigerator system.

Abstract: A temperature-controllable equipment cabinet comprising a diffusion-absorption refrigeration cycle system (5), an evaporator pipe (4) of the refrigeration system extending through a wall (9) of the cabinet and passing through a sealed enclosure (3) for containing a heat transfer liquid (12), the sealed enclosure extending across and forming part of an internal surface (15) of the cabinet such that the refrigeration system in use extracts heat from within the cabinet to an external environment (7).

Abstract: A thermoelectric refrigerator apparatus (20) comprising a thermoelectric device (1) having an upper face (1a) and a lower face (1b), a sealed cavity (22) for containment of a heat transfer liquid (8) in direct thermal contact with the upper face (1a) of the thermoelectric device (1)5 the cavity (22) being configured to allow convective flow (21) of the heat transfer liquid (8) from the upper face (1a) of the thermoelectric device (1) to an upper surface (12) of the cavity comprising a heat dissipation area (12) so as to transport heat from the lower face (1b) to an external environment via the heat dissipation area (12), wherein the thermoelectric device (1) is at least partially encapsulated by an encapsulating medium (2) providing a fluid seal around a perimeter edge (7) of the thermoelectric device (1) between the upper and lower faces (1a, 1b).