Rack Footprint Math for the 0.05 PH/s Floor
The 0.05 PH/s figure is a common entry point for warehouse operators testing profitability before scaling. It is also the threshold below which our firm declines site assessments — not because smaller deployments are unimportant, but because intake and electrical mistakes at this scale set patterns that multiply painfully at 0.2 PH/s and above.
Floor area rule of thumb
For air-cooled units common in Korean imports:
| Hashrate band | Floor area (m²) | Ceiling height minimum |
|---|---|---|
| 0.05 PH/s | 40–55 | 3.2 m |
| 0.08 PH/s | 60–80 | 3.5 m |
| 0.12 PH/s | 90–120 | 4.0 m |
These assume single-row layout with 1 m service aisle behind racks. Double-row configurations need 30% additional intake opening area.
Electrical headroom
At 0.05 PH/s with typical J/TH efficiency curves, plan for 14–16 kW sustained draw per PH/s including PSU losses and fan overhead. A 0.05 PH/s row therefore needs roughly 750–850 A at 220 V three-phase — but verify against your specific unit’s nameplate, not pool averages.
Intake opening sizing
Calculate required intake area in m² as:
Intake area ≈ (total fan CFM × 0.00047) / target face velocity
Target face velocity through filters: 2.0–2.5 m/s for pre-filter banks in dusty agricultural settings. Undersized openings raise face velocity, increase filter loading, and amplify cold-spot formation at rack ends.
Cool-climate adjustment
In sites with winter lows below −5 °C, add 15% intake area margin. Cold air is denser; fans move more mass per CFM, which can over-deliver chill to leading racks if openings are sized only for summer.
Before you order
Send us your barn dimensions and target unit model. A 30-minute scoping call often prevents a full reassessment later — though we still recommend on-site verification before wire-up.