A cassette AC is installed flush in the false ceiling and distributes air in four directions from its centre. Ideal for offices and open commercial spaces that a wall-mounted split cannot cover effectively.
When to Choose Cassette Over Split
| Factor | Wall Split | Ceiling Cassette |
|---|---|---|
| Ideal coverage | 20–40 sqm | 30–80 sqm |
| Air distribution | One or two directions | Four equal directions |
| Aesthetics | Visible on wall | Integrated in ceiling |
| Maintenance | Easy access | Requires ceiling access |
| Cost | Lower | 30–50% higher |
Professional Cassette Installation Steps
1. Identifying the Optimal Position
Must be centred in the space for even distribution. If the space is very rectangular, two units or a larger capacity may be needed to cover both ends.
2. Selecting the Correct Capacity
In Jazan, the cassette needs 20–25% higher capacity due to the additional humidity load — otherwise it will run continuously without achieving required comfort.
3. Routing the Condensate Pump and Pipe
The cassette has an internal condensate pump that lifts water to the drain pipe. In Jazan, the pipe must be designed for higher flow volume (twice Abha's typical rate) to handle the large condensate volume.
4. Secure Ceiling Mounting
A cassette weighs 20–30kg. It is mounted on strong metal brackets attached to the actual ceiling structure, not just plasterboard. Weak mounting causes vibration and noise over time.
Cassette in the Regional Climate — What Differs
- Khamis Mushait: Choose an Inverter cassette to avoid repeated short cycles in the long, hot summer
- Jazan: Confirm the condensate pump has adequate capacity — excess condensate will overwhelm an undersized pump
- Abha: In offices with ceilings above 3m, verify the air throw specification is sufficient to reach the occupied level