Abstract: Methods and apparatus for accessing HVAC coils according to various aspects of the present technology comprise a plenum access panel that is configured to be coupled to a plenum either upstream or downstream from an HVAC component. The plenum access panel may comprise one or more moveable sections configured to provide access into the interior of the plenum or associated ductwork without requiring the disassembly of the ductwork from the HVAC component.

Abstract: Methods and apparatus for a universal transition according to various aspects of the present invention comprise a duct that is configured to be located between two heat exchanging devices and provide an improved airflow transition. The system may comprise one or more wall sections configured to provide an increasing or decreasing cross-sectional area in the direction of the airflow to facilitate a more gradual transition between an exhaust vent of one heat exchanging device and an intake vent of a second heat exchanging device. The system may also comprise a removable access panel that allows the intake and exhaust vents to be cleaned and/or serviced without having to physically decouple the heat exchanging devices from each other.