A dynamic multi-pane assembly comprising: an interior pane that is gas permeable; a first exterior pane spaced from a first side of the interior pane and defining an evacuated gap between the first side of the interior pane and the first exterior pane, the evacuated gap having a predetermined thickness within which a vacuum is drawn; a second exterior pane spaced from a second side of the interior pane and defining a pressurized gap between the second side of the interior pane and the second exterior pane; a vacuum source in communication with the evacuated gap; a source of pressurized gas in communication with the pressurized gap; a control assembly comprising: a processor in communication with the source of vacuum and the source of pressurized gas; a first pressure sensor in communication with the processor and the evacuated gap; and a second pressure sensor in communication with the processor and the pressurized gap, wherein the processor, in response to sensed pressure from at least one of the first and second pressure sensors (50; 52), is adapted to selectively actuate at least one of the source of vacuum and the source of pressurized gas to maintain a set level of vacuum within the evacuated gap and a set level of pressure within the pressurized gap of the dynamic multi-pane assembly at respective desired levels, wherein the source of pressurized gas is pressurized at a set level that is greater than the pressure within the evacuated gap, and wherein gas from the pressurized gap permeates through the interior pane and into communication with the evacuated gap. an interior pane that is gas permeable; a first exterior pane spaced from a first side of the interior pane and defining an evacuated gap between the first side of the interior pane and the first exterior pane, the evacuated gap having a predetermined thickness within which a vacuum is drawn; a second exterior pane spaced from a second side of the interior pane and defining a pressurized gap between the second side of the interior pane and the second exterior pane; a vacuum source in communication with the evacuated gap; a source of pressurized gas in communication with the pressurized gap; a control assembly comprising: a processor in communication with the source of vacuum and the source of pressurized gas; a first pressure sensor in communication with the processor and the evacuated gap; and a second pressure sensor in communication with the processor and the pressurized gap, wherein the processor, in response to sensed pressure from at least one of the first and second pressure sensors (50; 52), is adapted to selectively actuate at least one of the source of vacuum and the source of pressurized gas to maintain a set level of vacuum within the evacuated gap and a set level of pressure within the pressurized gap of the dynamic multi-pane assembly at respective desired levels, wherein the source of pressurized gas is pressurized at a set level that is greater than the pressure within the evacuated gap, and wherein gas from the pressurized gap permeates through the interior pane and into communication with the evacuated gap. a processor in communication with the source of vacuum and the source of pressurized gas; a first pressure sensor in communication with the processor and the evacuated gap; and a second pressure sensor in communication with the processor and the pressurized gap, wherein the processor, in response to sensed pressure from at least one of the first and second pressure sensors (50; 52), is adapted to selectively actuate at least one of the source of vacuum and the source of pressurized gas to maintain a set level of vacuum within the evacuated gap and a set level of pressure within the pressurized gap of the dynamic multi-pane assembly at respective desired levels, wherein the source of pressurized gas is pressurized at a set level that is greater than the pressure within the evacuated gap, and wherein gas from the pressurized gap permeates through the interior pane and into communication with the evacuated gap.