Remember when designing an installation, a minimum of three feet of clearance on each side of any major component is optimal for ventilation and maintenance. Additionally, equipment should be positioned so that heated ventilation discharge air does not blow toward any equipment sensitive to an increase in ambient temperature.
Bad Installation: The discharge of the compressor blows right into the intake of the refrigerated dryer, so the customer put a piece of plywood between the two. There is not enough space to get at the unit to properly perform maintenance, considering the walls, dryers, plumbing, and the air compressor.
Great Installation: The attached picture is an example of a great installation; they leave three feet between the units for maintenance, and have even ducted the discharge of the package for heat recovery, and it will not interfere with any other equipment.