Central Air Conditioning (Central AC) in Makkah
Makkah — Central AC & Rooftop Package Unit (DX) — Design, Supply, Installation, Commissioning & Maintenance
In-Depth Technical Overview
The solution covers DX/AHU central air-conditioning (an indoor Air Handling Unit paired with an outdoor DX condensing unit) and the rooftop package unit (Package Unit) as an all-in-one rooftop system. The choice—or hybrid combination—depends on load distribution, required IAQ (indoor air quality), space constraints, and the operation & maintenance strategy.
DX/AHU Central AC
- Central air treatment via an AHU with multi-stage filtration, cooling coils, fresh/return air mixing, and fans sized for the duct network (sufficient external static pressure).
- Deep BMS integration (BACnet/Modbus) for sensor monitoring, energy reporting and fault alarms.
- Ideal where IAQ is a priority (higher filtration grades, precise fresh-air rates, and differential pressure control).
Rooftop Package Unit (DX Rooftop / Package Unit)
- A single factory-assembled unit (compressor + evaporator + condenser + fans + optional economizer) installed on the roof and typically feeding shorter duct runs.
- Fast deployment, roof-level service accessibility, and a modular approach that suits tenant-by-tenant or zone-by-zone loads.
In many Makkah projects, a hybrid approach yields the best balance: package units for standard/leased areas, and DX/AHU where higher IAQ specs and deeper BMS integration are required.
Scope by Hboob in Makkah
1) Design & Engineering
- Realistic cooling/heating load calculations (envelope, occupancy, lighting, equipment, ventilation).
- Capacity selection and unit counts with pragmatic diversity to reduce CAPEX/OPEX.
- Ductwork design: acceptable velocities, pressure/noise targets, and air balancing plans.
- IAQ: filtration grades, fresh-air rates, and pressure control for critical areas if needed.
- Controls schematics and BMS integration, run schedules, and setpoint policies.
2) Supply & Compliance
- Supply of AHUs/rooftop package units with submittals and owner/consultant approvals.
- Site constraints compliance: duct/piping lengths, acoustic limits, anti-corrosion options, and maintenance access paths.
3) Execution (Mechanical/Electrical/Controls)
- Anti-vibration bases, duct fabrication/installation to SMACNA/DW, thermal/acoustic insulation, flexible joints and access openings.
- Power/controls wiring, signal interfacing, VFD fan speed control, and economizer configuration/programming where applicable.
4) Testing, Commissioning & Balancing (T&C / TAB)
- Full commissioning: airflow/pressure/current/temperature measurements, controller tuning and air balancing at terminals.
- Handover with as-built documentation, equipment schedules, test certificates and operator training.
5) Maintenance & Support in Makkah
- Preventive service (coil/filter/fan cleaning, belt/bearing checks, sensor calibration).
- Local breakdown response, performance reports and optimization for energy savings.
Performance-Boosting Options
- EC/VFD fans to minimize part-load consumption.
- Economizer for free-cooling with suitable outdoor conditions.
- Multi-stage filtration and heat recovery (where justified).
- BMS dashboards for energy tracking and alarms.
Use Cases in Makkah
- Retail/hypermarkets and leased units: standardized package units per bay.
- Offices & admin spaces: DX/AHU for high IAQ and tight BMS integration, or package units for open layouts.
- Education/training: schedulable operation and noise constraints.
- Hospitality/serviced apartments: quiet solutions with premium finishes.
Focused Comparison
| Item | DX/AHU Central | Rooftop Package Unit |
| Deployment | More indoor works | Rapid roof installation |
| Controls/BMS | Deeper integration & rich reporting | Adequate for most facilities |
| IAQ | Higher (filtration/fresh air/pressure) | Good, upgradable with add-ons |
| Maintenance | Organized indoor access | Direct roof access |
| Expansion | Flexible with ductwork modifications | Modular via additional units |
Why Hboob in Makkah?
- Applied engineering rigor and quality procedures at every stage.
- Total cost of ownership reduction through smart controls and part-load efficiency.
- Responsive after-sales support with local teams.
FAQ — Makkah
How do I choose between AHU/DX and a package unit? We study loads, site constraints and IAQ requirements—often a hybrid mix is optimal.
Main cost drivers? Capacities, unit counts, duct network, filtration level, controls/BMS, and roof constraints.
Future expansion? Yes—package units scale modularly; DX/AHU scales with planned ductwork revisions.
Noise? We set air velocities, fan selections, insulation and vibration isolation to meet decibel targets in sensitive zones.
