A split system places the evaporator inside the cold room and the condensing unit elsewhere.

In short: it can move heat and noise away from the room, but the refrigerant-line design and installation are critical.

Check maximum line length, vertical lift, pipe size, oil return, insulation, condensate drainage and outdoor design temperature. Some products use factory-prepared quick connections, while conventional systems require work by qualified personnel.

“Pre-charged” does not remove every legal or safety requirement. Follow the exact product documentation and national rules. Longer or altered lines may require a different design and refrigerant charge.

How a split works

The evaporator is fitted inside the cold room; the condensing unit (compressor + condenser) sits remotely — outdoors, on the roof, or in a dedicated machine room. The two are joined by insulated liquid and suction lines. On a standard split these are evacuated and charged on site by a certified (F-gas) engineer; Frostbox quick-connect splits (Daikin GS / SP-O) use factory-charged lines in 2.5 / 5 / 10 m lengths and can be self-installed without F-gas certification — runs over 10 m use a standard split fitted by a certified installer.

Strengths

• Heat goes outside — waste heat leaves the building instead of fighting your air-conditioning.
• Quiet interior — the compressor is remote from staff and customers.
• Higher capacity — scales to 50+ kW; multi-compressor packs add redundancy for critical stores.
• Flexible siting — the noisy, hot half can be placed wherever it suits the building.

Limitations

• Higher installed cost — field pipework, evacuation, and charging by a certified engineer on standard splits (Frostbox quick-connect splits avoid this — see below).
• Needs external space — an outdoor or well-ventilated location for the condensing unit.
• Pipe-run limit — practical distance between evaporator and condenser is typically 15–25 m; longer runs hurt oil return and capacity.

Splits suit cold and freezer rooms in larger kitchens, distribution and production facilities, and any room that cannot vent heat into its surroundings.

Frostbox / Daikin reality: Frostbox supplies Daikin condensing units, selected by family for standard split distances. The configurator distinguishes quick-connect (plug-and-play) families from standard-distance families and matches the right one to your room, temperature, and the distance to the condenser. Quick-connect families (Daikin GS / SP-O) ship with factory-charged lines in 2.5 / 5 / 10 m lengths and can be self-installed without F-gas certification; runs over 10 m use a standard-distance split fitted by a certified installer. Ask for the model datasheet — available on request.

Related articles

• Monoblock vs split: which to choose
• Monoblock 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. Datasheets are available on request — contact [email protected].