A conditioning system (100, 200, 300, 500) for controlling air conditions in an enclosed space (102, 202, 302, 502), the conditioning system (100, 200, 300, 500) comprising: a cooling system (101, 201, 301, 501) disposed outside of the enclosed space (102, 202, 302, 502), the cooling system (101, 201, 301, 501) comprising: a scavenger air plenum (104, 204, 304, 504) having an air inlet (106, 206, 306, 506) and outlet (108, 208, 308, 508), the plenum (104, 204, 304, 504) configured to direct scavenger air in an air flow path from the air inlet (106, 206, 306, 506) to the air outlet (108, 208, 308, 508); and a liquid to air membrane energy exchanger (LAMEE) (110, 210, 310, 510) arranged inside the plenum (104, 204, 304, 504), the LAMEE (110, 210, 310, 510) comprising a cooling fluid flow path separated from the air flow path by a membrane, the LAMEE (110, 210, 310, 510) configured to use the scavenger air to evaporatively cool a cooling fluid in the cooling fluid flow path, a temperature of the cooling fluid at a fluid outlet (118, 218, 318, 518) of the LAMEE (110, 210, 310, 510) is lower than a temperature of the cooling fluid at a fluid inlet (116, 216, 316, 516) of the LAMEE (110, 210, 310, 510); and the conditioning system (100, 200, 300, 500) characterised by further comprising: a cooling coil (112, 212, 312, 512) arranged inside the plenum (104, 204, 304, 504) downstream of the LAMEE (110, 210, 310, 510) and configured to use the scavenger air to cool the cooling fluid; and a cooling fluid circuit connected to the cooling fluid flow path of the LAMEE (110, 210, 310, 510) and extending from the plenum (104, 204, 304, 504) into the enclosed space (102, 202, 302, 502), the cooling fluid circuit configured to provide cooling to the enclosed space (102, 202, 302, 502) without moving air from the enclosed space through the cooling system (101, 201, 301, 501). a cooling system (101, 201, 301, 501) disposed outside of the enclosed space (102, 202, 302, 502), the cooling system (101, 201, 301, 501) comprising: a scavenger air plenum (104, 204, 304, 504) having an air inlet (106, 206, 306, 506) and outlet (108, 208, 308, 508), the plenum (104, 204, 304, 504) configured to direct scavenger air in an air flow path from the air inlet (106, 206, 306, 506) to the air outlet (108, 208, 308, 508); and a liquid to air membrane energy exchanger (LAMEE) (110, 210, 310, 510) arranged inside the plenum (104, 204, 304, 504), the LAMEE (110, 210, 310, 510) comprising a cooling fluid flow path separated from the air flow path by a membrane, the LAMEE (110, 210, 310, 510) configured to use the scavenger air to evaporatively cool a cooling fluid in the cooling fluid flow path, a temperature of the cooling fluid at a fluid outlet (118, 218, 318, 518) of the LAMEE (110, 210, 310, 510) is lower than a temperature of the cooling fluid at a fluid inlet (116, 216, 316, 516) of the LAMEE (110, 210, 310, 510); and the conditioning system (100, 200, 300, 500) characterised by further comprising: a scavenger air plenum (104, 204, 304, 504) having an air inlet (106, 206, 306, 506) and outlet (108, 208, 308, 508), the plenum (104, 204, 304, 504) configured to direct scavenger air in an air flow path from the air inlet (106, 206, 306, 506) to the air outlet (108, 208, 308, 508); and a liquid to air membrane energy exchanger (LAMEE) (110, 210, 310, 510) arranged inside the plenum (104, 204, 304, 504), the LAMEE (110, 210, 310, 510) comprising a cooling fluid flow path separated from the air flow path by a membrane, the LAMEE (110, 210, 310, 510) configured to use the scavenger air to evaporatively cool a cooling fluid in the cooling fluid flow path, a temperature of the cooling fluid at a fluid outlet (118, 218, 318, 518) of the LAMEE (110, 210, 310, 510) is lower than a temperature of the cooling fluid at a fluid inlet (116, 216, 316, 516) of the LAMEE (110, 210, 310, 510); and the conditioning system (100, 200, 300, 500) characterised by further comprising: a cooling coil (112, 212, 312, 512) arranged inside the plenum (104, 204, 304, 504) downstream of the LAMEE (110, 210, 310, 510) and configured to use the scavenger air to cool the cooling fluid; and a cooling fluid circuit connected to the cooling fluid flow path of the LAMEE (110, 210, 310, 510) and extending from the plenum (104, 204, 304, 504) into the enclosed space (102, 202, 302, 502), the cooling fluid circuit configured to provide cooling to the enclosed space (102, 202, 302, 502) without moving air from the enclosed space through the cooling system (101, 201, 301, 501).