The unit must remove the room's heat load at the required room and ambient temperatures.
In short: choose between a monoblock or split arrangement, then verify capacity, refrigerant, power, noise, airflow and service access for the exact model.
Frostbox supplies matched Daikin/MTH refrigeration families, but model names alone do not state their full performance. Capacity changes with evaporating and ambient temperature.
A correct selection considers panels, doors, product loading, people, equipment and defrost. The size calculator estimates storage volume; it does not complete this engineering calculation.
How the two architectures differ
Both systems run the same vapour-compression cycle (compressor → condenser → expansion device → evaporator). What changes is where each component sits relative to the cold room — and that single difference drives every trade-off below.
| Monoblock | Split | |
|---|---|---|
| Layout | Compressor + condenser + evaporator in one housing | Evaporator inside the room; condensing unit remote |
| Refrigerant piping | None on site (sealed unit) | Field-run liquid + suction lines |
| Where waste heat goes | Into the space housing the cold room | Outdoors / machine room |
| Installation | No field-made refrigerant lines, but mounting, drainage and electrical work must still follow the model instructions | Standard splits require appropriately qualified refrigeration personnel. For a factory-sealed quick-connect model, confirm the permitted installer and line-length conditions in its current documentation |
| Practical capacity | ~0.5–7 kW | Up to 50+ kW, multi-compressor possible |
| Noise in work area | Compressor + fans are local | Compressor is remote |
| Relative install cost | Lowest | Higher (piping, evacuation, charging) |
Choosing between monoblock and split
| If your room is… | Lean toward |
|---|---|
| Small, single, with an external wall to vent through | Monoblock (wall) |
| Small, against an internal partition / no spare wall | Monoblock (ceiling) |
| Indoor with no way to reject heat into the space | Split |
| Above ~7 kW load, or 25–50+ m³ | Split |
| Customer-facing or staffed area where noise matters | Split |
| Needing redundancy for critical stock | Split (multi-compressor) |
| Temporary, fast-deployment, or tight budget | Monoblock |
Frostbox configures rooms with Wall Monoblock, Ceiling Monoblock, or Split unit types. The units supplied are Daikin condensing units and monoblocks; exact model datasheets are available on request.
For a guided selection based on your dimensions, ambient conditions, and product, use the Frostbox size calculator.
Related articles
- Monoblock systems explained
- Split systems explained
- Capacity and temperature bands
- Refrigerants and F-gas compliance
- Choosing the right cold room
- Heat load calculation
Specifications reflect the Daikin refrigeration units supplied by Frostbox on MTH Algor cold rooms. Exact model capacities, refrigerant, and datasheets are available on request — contact [email protected].
