How Long Does Aircon Installation Take?
Whether you’re installing an air conditioning system in a new property or replacing an outdated unit, one question always comes up: How long will the installation take? While a typical aircon setup can take between 4 to 8 hours, the actual duration depends on a variety of factors — from the type of aircon system to the layout of your property and even the number of indoor units involved.
Understanding the timeline is crucial, especially if you’re coordinating with contractors, managing a busy household, or running a business that can’t afford extended downtime. This guide breaks down what affects aircon installation time, so you can plan ahead with confidence.
Factors That Affect Aircon Installation Time
Aircon installation isn’t a one-size-fits-all process. The time required can vary significantly based on the system type, property layout, and whether additional electrical or structural work is needed. Below, we break down the major factors that can impact the installation timeline.
Types of Aircon System
- Split System: Common in residential homes; includes one indoor and one outdoor unit.
Estimated time: 2–4 hours - Multi-split System: Connects multiple indoor units to one outdoor unit; requires more planning and piping.
Estimated time: 4–6 hours - Central Air Conditioning: Often installed in large homes or commercial properties; involves ductwork and multiple vents.
Estimated time: 1–2 days - Portable Units: Require minimal setup, typically involving only an exhaust hose.
Estimated time: 0.5–1 hour
Installation Location
- HDB flats and condos may require permission or have restrictions that add time.
- Landed homes often offer easier access but could have more complex routing.
- Commercial spaces usually demand larger systems and compliance checks.
- Challenging features like concrete walls, false ceilings, or high ceilings can delay pipework and mounting.
- Balcony or high-floor outdoor units may require scaffolding or special anchoring.
Number of Indoor Units
- System 1 (1 indoor + 1 outdoor): Fastest and most straightforward
- System 3 or System 4: Adds hours to the job due to extended routing and testing
Whether Ductwork or Rewiring is Required
- New Installations: May require new electrical wiring, trunking, and site prep.
- Replacements: Can sometimes reuse existing trunking but may still need testing and adjustments.
Site Conditions and Accessibility
- Wall materials like brick or concrete require more drilling time.
- Outdoor unit placements on tight balconies or walls require secure mounting and more labor.
- Weather conditions like rain or extreme heat can cause delays.
- Furniture obstructions or limited access to install areas will slow progress.
Estimated Installation Time by System Type
While actual timing can vary depending on site conditions and installer experience, the following estimates provide a useful guideline for planning your installation day.
| System Type | Description | Estimated Time |
|---|---|---|
| System 1 | 1 indoor + 1 outdoor unit (basic setup) | 2–3 hours |
| System 2 | 2 indoor + 1 outdoor unit | 3–4 hours |
| System 3 | 3 indoor + 1 outdoor unit | 4–6 hours |
| System 4 | 4 indoor + 1 outdoor unit | 6–8 hours |
| Central System | Ducted aircon (larger homes or offices) | 1 full day or more |
Aircon Installation Process Overview
Aircon installation is more than just mounting the unit—it involves technical planning, precision work, and safety checks. Here’s what to expect from start to finish during professional aircon setup in Singapore.
Site Assessment
- Technician conducts a pre-installation inspection to assess wall structure, space, and electrical readiness.
- Plans unit placement for airflow, drainage, and visual alignment.
- Measures pipe routing and checks power supply capacity.
- For HDB or condos, approval or compliance checks may be needed.
Indoor Unit Installation
- Mounts the unit securely using a wall bracket.
- Installs drain piping with the correct tilt for water flow.
- Connects refrigerant piping and trunking to the outdoor unit.
- Clears installation zones in advance.
Outdoor Unit Installation
- Mounts condenser on a stable base or wall bracket.
- Ensures proper ventilation (30–50 cm clearance).
- For high-rise buildings, secure anchoring is done per safety codes.
Electrical Wiring & Refrigerant Connection
- Connects electrical wiring between units.
- Secures refrigerant lines, vacuums system, and tops up gas.
- Performs safety checks and system tests.
System Testing & Clean-Up
- Performs leak and pressure tests.
- Runs the unit to check cooling, noise, and fan speed.
- Explains system controls and scheduling features.
Tips to Minimise Installation Delays
Even with experienced technicians, small oversights can slow down your installation. Here are simple ways to ensure your setup runs smoothly and finishes on time:
- Clear the Installation Area: Remove furniture or obstacles to speed up work and avoid damage.
- Confirm Unit Placement: Finalise indoor and outdoor locations during the assessment.
- Ensure Power Supply Is Ready: Make sure your system can handle the electrical load.
- Review HDB/Condo Rules: Get permits if needed for drilling, scaffolding, or external brackets.
Conclusion
So, how long does aircon installation take? For most standard residential systems in Singapore, installation takes between 2 to 8 hours — depending on the system type, number of indoor units, and site conditions.
More complex setups, such as central air conditioning or installations involving multiple floors, may extend to a full day or more. While the exact timing can vary, professional installers are trained to assess your site, identify potential delays, and carry out safe, efficient installations.
