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SengoMaroc

Cold rooms

Design, installation, maintenance and repair of positive and negative cold rooms.

From load calculations and design to installation and commissioning, we handle the full cold-room project. We also service existing rooms: gas leaks, damaged insulation, doors that no longer seal, compressor failures.

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Cold room installation and maintenance
Cold rooms
Same-day quote
2-year service warranty
From 200 MAD
Emergencies 7 days a week
Authorized on all brands — manufacturer warranty preserved — Qualified & certified technicians

Why it matters

A cold room is not just a cold box: it's an investment that can reach tens of thousands of MAD and, badly designed, becomes a financial sinkhole. Common market mistakes: undersizing (small unit on a large room = compressor running non-stop and burning out in a year), inadequate insulation (40 mm panels instead of 60 mm = doubled consumption), floor with no insulation (cold seeps up from the ground). A proper cooling-load study at design saves hundreds of MAD/month in electricity and years of equipment life. HACCP also mandates stable, logged temperatures — without records, non-compliance at inspection.

Equipment and systems we service

We work on every format commonly installed in Morocco.

  • Positive cold room (0 to +8 °C)

    The most common in restaurants, hotels and bakeries: vegetables, fresh meat, fish, dairy and pastries. Runs on a single condensing unit at medium pressure.

  • Negative cold room (-18 to -25 °C)

    For frozen goods: meat, fish, ready meals and ice cream (-25 °C). Requires thicker insulation (100-120 mm), a door with anti-freeze heating element and an automatic defrost system.

  • Monobloc units

    Complete unit mounted on the wall or roof, with no split between condenser and evaporator. Fast install, best for small rooms (2 to 10 m³) and lower cost.

  • Split systems (remote condensing unit)

    The condenser is remote (often rooftop), the evaporator inside the room, joined by copper piping. Ideal for larger rooms or when the condenser noise must be moved away.

  • Insulated sandwich panels

    Pre-fabricated panels in coated steel with a polyurethane foam core, 60 to 150 mm thick. Assembled with eccentric cam locks for excellent thermal insulation.

  • Specialised doors

    Hinged or sliding doors, magnetic seals, heated frames on negative doors (to prevent freezing of the seal). Automatic sliding doors for high-traffic flow (logistics).

Our intervention process

A simple, transparent flow — from first message to a fully working unit.

  1. 1
    Needs study and cooling load calculation

    Site survey: dimensions, product type, daily throughput, delta-T ambient vs setpoint and door-opening frequency. These inputs let us calculate the required cooling capacity (frigories/hour).

  2. 2
    Design and quotation

    Room plan, panel thickness choice (60 mm for standard positive, 100-120 mm for negative), floor type (tile or reinforced panels), door and refrigeration unit. Detailed quote, no hidden fees.

  3. 3
    On-site build

    Insulated floor laid, walls assembled from cam-lock panels, roof, door, then indoor evaporator and outdoor condenser installed with copper and electrical hook-up. Between 2 days and a week depending on size.

  4. 4
    Vacuum, charge and commissioning

    Circuit vacuumed to remove any moisture, refrigerant charged to the gram, thermostat set, defrost cycles programmed, then a temperature pull-down test.

  5. 5
    Handover and training

    Team training on the controller, tips to hold temperature (limit door openings, avoid dumping too much warm stock at once), handover file with the circuit schematic.

  6. 6
    Maintenance and emergency repair

    After handover, follow-up under a periodic maintenance contract (condenser cleaning, gas check, interior sanitation, door seal check), with 7-day emergency service if a fault appears.

Signs you need this service

If you notice any of these symptoms, get in touch fast — waiting typically makes the repair more expensive.

  • You're opening a restaurant or hotel and need cold storage
  • The existing room no longer holds setpoint
  • Insulated panels show moisture marks or damage
  • The door no longer seals (worn magnetic gasket)
  • Excess ice on the evaporator despite defrost cycles
  • Electricity bill rising with no change in usage
  • Expansion project (extension or adding a negative room)
  • The existing unit runs on R22 (banned) and must be replaced

Available in

Frequently asked questions about this service

Any other question? Send us a message on WhatsApp.

How long does a new cold-room installation take?
It depends on size and site. Typically between two days and a week once the panels are on site. We give a clear schedule before starting.
What's the difference between a positive and a negative room?
Positive: 0 to +8 °C — for fresh products (vegetables, meats, dairy, pastries). Negative: -18 to -25 °C — for frozen goods (frozen meats, fish, ice cream). The negative requires thicker insulation (100-120 mm), a heated-frame door and a more frequent automatic defrost cycle.
What insulation thickness should I pick?
Standard positive room: 60 mm (fine for a 20-25 °C delta-T). Positive in very hot areas (Ouarzazate summer): 80 mm. Negative: 100-120 mm (delta-T up to 50 °C). Good insulation cuts electrical consumption by around 30%.
Can an existing room be extended?
Yes — if the panels are compatible, we add matching panels of the same thickness and type. The cooling-load calculation must be redone: a larger or additional unit may be required. A pre-extension study is essential to avoid losing performance.
Why has the power consumption suddenly spiked?
Common causes: fouled condenser (top cause), worn door seal (warm air ingress), excess ice on the evaporator blocking heat exchange, or gas undercharge forcing the compressor to overrun. A diagnostic visit pinpoints the cause in 30 minutes.
What is defrost?
Air moisture condenses as ice on the evaporator. As it builds up, it blocks heat exchange. Professional systems therefore program automatic defrost cycles (every 4-8 hours) using an electrical heater or hot gas. A negative room without automatic defrost is a guaranteed failure.
Do you provide HACCP temperature logging?
Yes — we install electronic data loggers with USB export or GSM/WiFi upload. Required by HACCP frameworks, they prove the goods stayed at temperature throughout storage.
Is R22 refrigerant still allowed?
R22 is banned for new installations and very limited for maintenance (rare, expensive stock). If your room runs on R22 we recommend replacing the unit with a modern solution (R290 propane, R448A, R452A) — better efficiency, greener, and available long-term.
Fast response

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A technician can respond immediately on WhatsApp.

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Sengo Maroc

Professional refrigeration, air-conditioning and appliance services across Morocco

Ouarzazate, MoroccoMonday to Saturday — 08:00 to 20:00Fast response 7 days a week for emergencies
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