invention reference numerals are used to identify structural elements portions of elements surfaces or areas in the drawings as such elements portions surfaces or areas may be further described or explained by the entire written specification for consistency whenever the same numeral is used in different drawings it indicates the same element portion surface or area as when first used unless otherwise indicated the drawings are intended to be read together with the specification and are to be considered a portion of the entire written description of this invention as required by 35 u s c u00a7 112 as used herein the terms u201c horizontal u201d u201c vertical u201d u201c left u201d right u201d u201c up u201d u201c down u201d as well as adjectival and adverbial derivatives thereof refer to the relative orientation of the illustrated structure as the particular drawing figure faces the reader referring now to fig1 there is shown a view of the floor plan of a drive by building 10 according to a preferred embodiment of the present invention building 10 may be of the type referred to in the construction trade as u201c stick built u201d or u201c site built u201d preferably however building 10 is a prefabricated modular building which may have virtually any convenient size and number of modules the exterior walls of building 10 are substantially made up of a plurality of temperature controlled display cabinets also termed u201c coolers u201d 12 a 12 f of a type and construction to be described.