Mitsubishi Electric SLZ-M35FA 3.5kW 4-Way Ceiling Cassette
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The Mitsubishi Electric SLZ-M35FA is a versatile 3.5kW ceiling cassette, perfectly sized for medium-sized rooms, meeting rooms, or boutique retail spaces. Like its smaller counterpart, this unit is designed for standard 600x600mm ceiling grids, ensuring a straightforward installation process for professional installers. It delivers powerful, consistent cooling and heating performance while maintaining exceptionally low noise levels, making it ideal for environments where quiet operation is essential. The unit's intelligent airflow management ensures that air is directed exactly where it is needed, preventing drafts and maintaining a stable, comfortable temperature. With its energy-efficient inverter drive, the SLZ-M35FA helps reduce operational costs, making it a smart choice for energy-conscious businesses. The unit is fully compatible with modern smart control systems, allowing for remote monitoring and scheduling. Its combination of compact design, high efficiency, and advanced control features makes it a staple for professional climate control in the UK.
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Smart-home ready
Connects natively with the systems below — control by app or voice.
- Free UK mainland delivery on in-stock units
- Manufacturer warranty included
- 14-day returns
Downloads & specs
More from Mitsubishi Electric →Manufacturer instructions
The Mitsubishi Electric SLZ-M35FA is a professional-grade ceiling cassette requiring installation by a qualified technician. The unit is designed for 600mm x 600mm suspended ceiling grids with a compact 245mm height. Installation involves mounting the indoor unit securely within the ceiling void, connecting refrigerant piping (using authorized copper tubes and flaring tools), and installing the drain pipe. Electrical connections must adhere to local regulations. After installation, the system must be pressure-tested for refrigerant leaks to prevent the release of poisonous gases. The outdoor unit (SUZ-KA35VA6) uses R32 refrigerant, which requires specific handling protocols. Before the first power-on, ensure all panels and guards are correctly secured. Do not start operation immediately after turning on the power; allow the system to stabilize to avoid damaging internal components.
Fixed units must be installed by a qualified F-gas engineer. Find an installer — we'll match you with a local HVAC professional.
Full Specifications
Description
The Mitsubishi Electric SLZ-M35FA is a versatile 3.5kW ceiling cassette, perfectly sized for medium-sized rooms, meeting rooms, or boutique retail spaces. Like its smaller counterpart, this unit is designed for standard 600x600mm ceiling grids, ensuring a straightforward installation process for professional installers. It delivers powerful, consistent cooling and heating performance while maintaining exceptionally low noise levels, making it ideal for environments where quiet operation is essential. The unit's intelligent airflow management ensures that air is directed exactly where it is needed, preventing drafts and maintaining a stable, comfortable temperature. With its energy-efficient inverter drive, the SLZ-M35FA helps reduce operational costs, making it a smart choice for energy-conscious businesses. The unit is fully compatible with modern smart control systems, allowing for remote monitoring and scheduling. Its combination of compact design, high efficiency, and advanced control features makes it a staple for professional climate control in the UK.
Compare similar units
Side-by-side specs for other ceiling cassettes in a similar BTU range.
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Mitsubishi ElectricAnnual energy savings estimate
How much this A++-rated unit could save versus a standard C-rated model, based on your usage.
This unit
97 kWh/yr
EER 13
Standard model
158 kWh/yr
EER 8
Est. saving
£16.44
61 kWh/yr less
Estimate based on the unit's energy-rating efficiency factor and cooling capacity (12,000 BTU). Actual savings vary with room size, climate and usage patterns.
Winter heating cost: this AC vs electric heaters
This unit reverses to heat your room in winter. Based on its 4 kW heat output used 5 hrs/day over a 150-day UK heating season at £0.27/kWh.
Electric heater / season
£831
This AC / season
£277
You save / season
£554
~67% less electricity
| Heating method | Electricity / season | Cost / season | Efficiency | Summer cooling |
|---|---|---|---|---|
| This heat-pump AC | 1026 kWh | £277 | Up to 300% | |
| Plug-in electric heater | 3077 kWh | £831 | 100% | |
| Electric storage heater | 3077 kWh | £831 | 100% |
Heat output estimated from this unit's 14,000 BTU/hr rating. A heat pump moves heat (COP ≈ 3), so it uses about a third of the electricity of a direct-electric heater for the same warmth. Actual savings vary with room size, insulation, tariff and usage. See the full comparison →
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