Abstract: An apparatus for use with a fan coil cabinet occluded by a releasably secured baffle having intake and discharge vents communicating with the cabinet and containing a coil which water passes and a fan which forces air past the coil for conditioning, wherein the fan has an outlet and a coil. The apparatus comprises a housing with the fan and coil mounted thereto, and a support mounted to the cabinet wherein the housing slides for movement between a retracted position, within the cabinet, and an extended position, protruding from the cabinet. The housing has a port with the fan coupled thereto for sealed communication between the port and the outlet. The coil and the housing define a cavity with which the port communicates. The housing defines an aperture and a door releasably secured in occluding relation to the aperture to provide access to the cavity for maintenance of the coil.