Selection and sizing
How thick should a cold room panel be
Panel thickness follows the temperature difference across it, not the room temperature alone. How to work it out, and where the electricity bill decides.
Selection and sizing
Piston or screw: what decides it
Load profile and running hours decide it, not tonnage. Part-load efficiency explained.
Cost
Chilled, frozen, blast: why cost per m² misleads
Why the three room types are not comparable by price per square metre, and what does set the cost.
Operation
Why an air cooler frosts up
Defrost faults, heater failure, drain blockage and the cases where the envelope is the cause.
Selection and sizing
How to size a cold room: three inputs, one room list
The four inputs that decide capacity, and why tonnage alone cannot produce a selection.
Selection and sizing
Cold room temperature zones, and what each one changes
What each temperature band means for panel thickness, cooler fin spacing and defrost.
Written from project experience, not from a catalogue. Every guide answers a question that came up in an enquiry.
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