At Longbeck coolroom hire we mount our refrigeration units on the rear wall or on the roof of our cool rooms.  Please see the diagrams below for the dimensions.
 

Coolroom (Chiller) or Freezer Rooms Size Range:

1.8 m(wide) x 2.4 m x 2.4 m H Outside Dimension of box

2.4 m x 2.4 m x 2.4 m H Outside Dimension

3.0 m x 2.4 m x 2.4 m H Outside Dimension

6.0 m x 2.4 m x 2.4 m H Outside Dimension ( Reefer shipping container )

Portable Bar 3.0 m x 2.4m x 2.7m H Outside Dimension

Trailer Coolroom 1.8m x 2.4m x 2.2m Outside Dimension of box

Total Trailer 4.0 m L x 2.3m W x 2.7 m H (with draw bar)

All units are fully insulated and are all completely transportable with the smaller rooms having 1 -hinged door 1.900 x 800 wide and the 6.0 m x 2.4 m rooms having container type doors one end.
Power to each unit is 3-pin plug single phase 15 amp per lead. An extension lead may be added to the existing power cord provided, but the total length must not exceed 15 metres. Any lead used must be 2.5mm thick, 3-core.