Electricity is typically the largest ongoing operating cost of a cold room — often exceeding maintenance and staffing costs combined. Understanding what your cold room will consume helps you budget accurately, size your generator correctly, and evaluate whether your existing power supply is adequate.
How Cold Room Power Consumption Is Calculated
Power consumption depends primarily on:
- Room size and volume — more air and surface area to keep cold
- Target temperature — the colder the room, the harder the refrigerant system works
- Ambient temperature — higher ambient means greater heat ingress
- Insulation quality — thicker, higher-quality panels reduce the refrigeration load
- Door usage — frequent opening allows warm air entry, forcing the system to recover
- Product loading — warm product introduced into the room requires additional cooling energy
Estimated Daily Consumption
| Cold Room Type & Size | Estimated Daily kWh |
|---|---|
| Small chiller, 5–10 m² | 8–20 kWh |
| Medium chiller, 10–30 m² | 20–60 kWh |
| Large chiller, 30–100 m² | 60–180 kWh |
| Small freezer, 5–10 m² | 15–35 kWh |
| Medium freezer, 10–30 m² | 35–100 kWh |
| Large freezer, 30–100 m² | 100–280 kWh |
These are approximate figures assuming moderate ambient temperatures (25°C) and reasonable operational discipline.
Monthly Cost Estimate
At Kenya Power’s current commercial tariff (approximately KES 20–25 per kWh for small commercial customers as of 2025), a medium chiller room consuming 40 kWh per day would cost roughly:
40 kWh × 30 days × KES 22 = KES 26,400 per month
A medium freezer room consuming 70 kWh per day:
70 kWh × 30 days × KES 22 = KES 46,200 per month
These figures can vary significantly with fuel cost surcharges, Foreign Exchange Adjustment (FERFA), and other KPLC levies that appear on commercial electricity bills.
Reducing Power Consumption
- Night setback: If the cold room is not accessed at night, slightly raising the target temperature by 1–2°C reduces running costs.
- Strip curtains and air curtains: Reduce warm air ingress each time the door opens.
- Regular maintenance: Clean condenser coils, check refrigerant charge, and service door seals — all of these directly affect efficiency.
- LED lighting: Replace any fluorescent tubes with LED — they generate less heat inside the room.
- Solar integration: Some large cold room operators in Kenya are integrating solar PV to offset daytime electricity costs.
Never accept a cold room quote without asking for an estimated power consumption figure. A good contractor will provide this as part of the heat load calculation. Compare this against your current KPLC tariff and factor it into your business case before committing to installation.