A system for controlling and monitoring environmental conditions in a building, the system comprising: a rack including: a housing including a front side opening and a back side opening; a plurality of slidable field panels (108, 110, 112) mounted in the housing in side-by-side relation in a horizontal direction, wherein each slidable field panel includes a vertical wall, wherein each slidable field panel is configured to independently slide at least partially out of the front side opening via a plurality of slides mounted laterally to the vertical wall of each slidable field panel and to the frame of the housing, wherein the slides having at least one movable member slide relative to at least one other member; a plurality of components, wherein each vertical wall of each slidable field panel includes one or more of the components mounted thereto, wherein the components include: a plurality of transformers, each including a plurality of terminals; and a plurality of building control modules, wherein the building control modules include a plurality of controller modules in operable connection with a plurality of relays and a plurality of input and/or output (I/O) modules, wherein each relay includes a plurality of terminals, wherein each I/O module includes a plurality of terminals; and at least one terminal panel including a plurality of connection terminals facing the back side opening, wherein the connection terminals are respectively wired to respective terminals of the relays, transformers, and I/O modules mounted to the field panels and at least one data processing system, including at least one processor configured via at least one application software component executed from a memory to communicate with the plurality of controller modules to cause the rack when a heating, ventilating, and air conditioning (HVAC) system is wired to at least some of the connection terminals, to monitor and control the HVAC. a rack including: a housing including a front side opening and a back side opening; a plurality of slidable field panels (108, 110, 112) mounted in the housing in side-by-side relation in a horizontal direction, wherein each slidable field panel includes a vertical wall, wherein each slidable field panel is configured to independently slide at least partially out of the front side opening via a plurality of slides mounted laterally to the vertical wall of each slidable field panel and to the frame of the housing, wherein the slides having at least one movable member slide relative to at least one other member; a housing including a front side opening and a back side opening; a plurality of slidable field panels (108, 110, 112) mounted in the housing in side-by-side relation in a horizontal direction, wherein each slidable field panel includes a vertical wall, wherein each slidable field panel is configured to independently slide at least partially out of the front side opening via a plurality of slides mounted laterally to the vertical wall of each slidable field panel and to the frame of the housing, wherein the slides having at least one movable member slide relative to at least one other member; a plurality of components, wherein each vertical wall of each slidable field panel includes one or more of the components mounted thereto, wherein the components include: a plurality of transformers, each including a plurality of terminals; and a plurality of building control modules, wherein the building control modules include a plurality of controller modules in operable connection with a plurality of relays and a plurality of input and/or output (I/O) modules, wherein each relay includes a plurality of terminals, wherein each I/O module includes a plurality of terminals; and at least one terminal panel including a plurality of connection terminals facing the back side opening, wherein the connection terminals are respectively wired to respective terminals of the relays, transformers, and I/O modules mounted to the field panels and a plurality of transformers, each including a plurality of terminals; and a plurality of building control modules, wherein the building control modules include a plurality of controller modules in operable connection with a plurality of relays and a plurality of input and/or output (I/O) modules, wherein each relay includes a plurality of terminals, wherein each I/O module includes a plurality of terminals; and at least one terminal panel including a plurality of connection terminals facing the back side opening, wherein the connection terminals are respectively wired to respective terminals of the relays, transformers, and I/O modules mounted to the field panels and at least one data processing system, including at least one processor configured via at least one application software component executed from a memory to communicate with the plurality of controller modules to cause the rack when a heating, ventilating, and air conditioning (HVAC) system is wired to at least some of the connection terminals, to monitor and control the HVAC.