Tony M Jan 6, 2017:

Condensing unit In a split refrigeration system, there is a 'condensing unit' — the big, noisy central plant that is located outside the building, often on the roof, in order to dissipate the heat; and an 'evaporator unit', that does the actual cooling part, of which there will be one per cooled volume.

B D Finch Jan 6, 2017:

Context What comes immediately after "storage cabinets and blast cabinets, condensing units" in your text, i.e. is it part of a list or in apposition to what comes before?