A fluid conditioning assembly includes a fluid conditioning device defining a passage and having a first end and a second end. A control element is supported within the passage. At least the first end includes an integral radially outwardly directed flange. The integral radially outwardly directed flange is configured to be operatively and releasably coupled to a first radially outwardly directed flange of a first duct section. A technician may release the fluid conditioning device from the first duct section to remove the fluid conditioning device from the ventilation duct system for accessing the control element of the fluid conditioning device.