Calculation method
- 1. Room duty = Σ(volume per temperature class × class W/m³); ULT duty = units × kW per freezer
- 2. Installed kW = room duty × redundancy factor + ULT duty
- 3. Generator kVA = ⌈installed × 1.4 ÷ 0.8 power factor × 1.25 margin⌉
- 4. Loggers = max(6, ⌈m³ ÷ 50⌉ + 2) + 2 per vehicle + 1 per ULT; gateways = ⌈(vehicles + 1) ÷ 5⌉
- 5. Annual kWh = installed × 8,760 h × 0.55 duty cycle
Calculations run in SI (m, m², m³, kW, kg, °C). Imperial equivalents: 1 m² = 10.76 ft², 1 m³ = 35.31 ft³, 1 kW = 3,412 BTU/h = 0.284 TR, 1 t = 2,205 lb, °F = °C × 1.8 + 32.

