Ceiling-cassette systems
Recessed into a suspended ceiling, four-way airflow. The right answer for offices and open-plan commercial spaces.
Cassette systems sit recessed into a suspended ceiling, with a discreet white grille flush with the tile. Air discharges in four directions, which gives even coverage across an open-plan space without the directional draught of a wall-mounted unit.
We fit cassettes mostly in commercial spaces — solicitors' offices, dental practices, gyms, open-plan studios — but they also work well in domestic conversions where there's a deep ceiling void available.
Capacity ranges from 3.6kW (single small office) up to 14kW (large open-plan retail or studio). Above that we'd typically run multiple cassettes off a single VRF outdoor unit, which keeps the look consistent across a large floor.
Commissioning paperwork for commercial cassettes is more involved than domestic — we need to demonstrate the air-change rate meets the relevant regulation, log the refrigerant charge for the F-Gas register, and provide a handover pack for the building manager. Sophie runs this end of the job; nothing leaves the site without it.
Every install we do, this is in.
The line items below are non-negotiable on every job. Anything beyond — relocation of an outdoor unit, building works, listed-building consent — is quoted separately and clearly.
- Site survey including ceiling-void inspection
- Cassette unit and matched outdoor condenser
- Refrigerant pipework, condensate pump, electrical isolation
- Recessed installation flush with the suspended ceiling
- Building Management System integration where required
- Commissioning, air-change demonstration, F-Gas record
- Handover pack for the facilities team
Things people ask before booking.
Will my ceiling void take a cassette?
Most modern suspended ceilings have 350mm+ of void, which is enough for any standard cassette. Older buildings with shallow voids can be tighter — Sophie will measure during the survey and tell you which models will fit.
Can it be controlled from a building management system?
Yes. Daikin, Mitsubishi and Toshiba all offer BMS interfaces — Modbus, BACnet or KNX — that integrate with whatever you're already running. We'll wire it in at install.
What about the noise in a quiet office?
Modern inverter cassettes run at 28–32 dBA on low fan, which is below normal office conversation. They get louder under heavy load, but the sizing exercise is designed to ensure heavy load is the exception, not the norm.
Recent installations of this kind.
Open-plan office cassettes, Northwich solicitors
Three Mitsubishi 4-way cassettes into a converted Victorian first-floor office. Clean recessed install, BMS-ready.
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Independent gym, Chester — high-output multi-split with humidity control
Two zones of cooling for a 240m² gym. Three high-wall units plus a cassette over the free-weights area, humidity logged for insurer.
View this installation