Printing ABS and ASA in a cold room did not work. Corners lifted, layers split, and the whole room smelled. An enclosure fixed most of that.
Two stacked side tables give enough height for the Y axis to move freely. The sides are thin acrylic held by printed corner clips, and the front is a hinged panel. Total cost was well under a commercial tent.
Keep the electronics and the power supply outside if you can, or at least away from the warm air at the top. Chamber temperature settles around 38 °C, which is plenty for ASA and harmless for the stepper drivers.