Abstract: An adjustable roof jack interconnects a roof-mounted air handler with a duct opening through the roof of a building in a full range from flat to a 6-in-12 pitch; so that a single roof jack is capable of use in substantially all standard construction. To accomplish this, the roof jack includes a lower rectangular box-like member, which is attached to the roof. An upper rectangular box-like member is made for attachment to a roof-mounted air handler; and the front and sides of the upper box-like member extend downwardly over the corresponding side and front of the lower roof-mounted member. The upper member is pivotally connected to the lower member at pivot points located through the sides intermediate the front and back of the two members.

Abstract: A temperature control chamber is designed for use with refrigerant recovery systems. The temperature control chamber comprises a main base portion, in the form of an upright container, with an open top. A refrigerant storage tank is placed in the container, which has dimensions such that the handle on the top of the storage tank extends beyond the top of the sides of the main base portion of the container. A rigid cover, with an aperture in its center, fits down over the open end of the main base portion; and the handle of the refrigerant storage tank extends through the aperture. A plurality of releaseable latches then secure the cover to the main base portion; so that when the refrigerant tank within the temperature control chamber is lifted and moved from place to place by means of its handle, the temperature control chamber also is lifted by the interaction of the top of the tank with the cover pressing downwardly on the top of the tank.