3 · Indicative conduction heat load
Temperature difference, ΔT
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Steady conduction through panels, Q = U · A · ΔT
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Indicative only. This is the steady-state fabric conduction load through the panel envelope. It excludes
door / infiltration, product pull-down, respiration, people, lighting, fan & defrost heat, floor-to-ground gain and safety
margin. A qualified refrigeration engineer must size the plant (SANS 10147 / relevant design guide).
Basis & assumptions
Verified sources. StoneWool panel U / R / mass and max unsupported spans: LiteSpan StoneWool Wall Panel brochure.
FRCel EPS installed R: LiteSpan 990 roof panel brochure. Cover width 1145 mm and EPS 20 kg/m³ core: Mauritius cold-room supply.
Steel skin 0.5 mm × 7850 kg/m³.
Assumptions / caveats (confirm with Technopol).