Selection and sizing
How to size a cold room
The four inputs that decide capacity, and why tonnage alone cannot produce a selection. Plus the five decisions that are expensive to correct once the room is built.
Selection and sizing
Cold room temperature zones
What each temperature band changes in panel thickness, fin spacing and defrost, from chilled storage to ultra-low.
Selection and sizing
Piston or screw: what decides it
Load profile and running hours decide it, not tonnage. Why a plant running one shift and one running continuously need different machines at the same capacity.
Cost
Chilled, frozen and blast: why cost per m² misleads
The same floor area can carry twice the installed cost depending on room temperature and daily turnover. The four inputs that actually set the price.
Operation
Why an air cooler frosts up
Frost is a result, not a cause. Defrost termination, heater failure, drain blockage, and the cases where the envelope is the problem.
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