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Direct Expansion (DX) Systems

Rooftop Packaged Unit (RTU)

An all-in-one heavy-duty DX system sited on a roof or slab, connected straight into a building's main ductwork.

Where you'll find it in the UAE

Supermarkets, showrooms, warehouses, light industrial buildings and standalone retail across Dubai Investments Park, Al Quoz and Dubai South. Favoured where there is no plant room and the roof is the only space.

Common faults

  • Weather and UV degradation of casing seals and access panels
  • Sand ingress into the condenser section after shamal winds
  • Belt-driven supply fan wear on older units
  • Economiser dampers seizing open or shut
  • Roof-level drainage backing up into the base tray

What servicing involves

Because everything sits in one cabinet outdoors, servicing covers both the refrigeration side and the air side in a single visit: condenser and evaporator coils, filters, belts, dampers, electrical contactors and the drainage tray. Access equipment and a roof permit are usually needed.

Need this equipment serviced?

Inspection first, fixed written price before any work begins, and a photo report on completion.

Related services

Frequently Asked Questions

It depends on duty and environment, but in the UAE the dust load and near-continuous runtime mean intervals are shorter than manufacturer figures written for temperate climates. We advise based on the actual installation.

Yes. We work on this equipment across residential, commercial and industrial sites, and will tell you honestly if a job falls outside our scope.

Fouled heat-transfer surfaces, degraded seals and control faults account for most call-outs. Dust and humidity accelerate all three in this climate.

Yes. Readings, service reports and certificates are issued on completion, in the format facilities managers and inspectors expect.

Yes. Planned preventive schedules with agreed response times generally cost less than reactive call-outs on equipment of this kind.

Inspection & Quote

Get a Fixed Price

Tell us what you need and we confirm a fixed written price after inspection. No charge to quote.

No obligation. Your details stay private.

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