Fujitsu Airstage KM Series 5.2kW Wall Mounted Split System
Available to order — dispatched on the lead time shown below.
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Retail prices include VAT.
For those needing maximum power and efficiency, the Fujitsu Airstage KM Series 5.2kW split system is the ultimate solution. Designed for large spaces, this unit provides exceptional cooling and heating performance, maintaining a consistent climate even in the most demanding conditions. The system features smart Wi-Fi integration, allowing you to control your home's temperature from anywhere, ensuring you always return to a comfortable environment. Its high-efficiency inverter technology adjusts power usage dynamically, helping to keep energy costs low despite its high output. The unit's quiet operation and elegant, modern design make it a sophisticated addition to any large room or office. As a full-featured reverse-cycle heat pump, it is highly effective for year-round use, providing powerful heating in winter and efficient cooling in summer. Professional installation is required to ensure the system operates at peak performance, making it a premium, long-term climate control solution for your property.
Need it installed?
We'll match you with a local HVAC engineer.
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
Technical documents & videos
More from Fujitsu →Official Fujitsu manual
The manufacturer's PDF for this model is being sourced and will be downloadable here.
Airstage Digital Catalogue
Fujitsu catalogue — open the official flipbook in a new tab.
Full Specifications
Physical dimensions
Exact dimensions for this model are being confirmed with Fujitsu — ask us and we will send the cut sheet with mounting and clearance figures.
Description
For those needing maximum power and efficiency, the Fujitsu Airstage KM Series 5.2kW split system is the ultimate solution. Designed for large spaces, this unit provides exceptional cooling and heating performance, maintaining a consistent climate even in the most demanding conditions. The system features smart Wi-Fi integration, allowing you to control your home's temperature from anywhere, ensuring you always return to a comfortable environment. Its high-efficiency inverter technology adjusts power usage dynamically, helping to keep energy costs low despite its high output. The unit's quiet operation and elegant, modern design make it a sophisticated addition to any large room or office. As a full-featured reverse-cycle heat pump, it is highly effective for year-round use, providing powerful heating in winter and efficient cooling in summer. Professional installation is required to ensure the system operates at peak performance, making it a premium, long-term climate control solution for your property.
Compare similar units
Side-by-side specs for other split system ac in a similar BTU range.
Common questions about the Fujitsu Airstage KM Series 5.2kW Wall Mounted Split System
How many BTU is the Fujitsu Airstage KM Series 5.2kW Wall Mounted Split System?
The Fujitsu Airstage KM Series 5.2kW Wall Mounted Split System has a cooling capacity of 18,000 BTU, suitable for Up to 55m².
What room size is the Fujitsu Airstage KM Series 5.2kW Wall Mounted Split System suitable for?
The Fujitsu Airstage KM Series 5.2kW Wall Mounted Split System is recommended for rooms Up to 55m².
Can I install the Fujitsu Airstage KM Series 5.2kW Wall Mounted Split System myself?
No — this unit requires professional installation by a qualified F-gas engineer. Use our Find an Installer service to get matched with a local HVAC professional.
Is the Fujitsu Airstage KM Series 5.2kW Wall Mounted Split System smart-home compatible?
Yes — the Fujitsu Airstage KM Series 5.2kW Wall Mounted Split System supports Google Home, Amazon Alexa for app and voice control.
How long does delivery of the Fujitsu Airstage KM Series 5.2kW Wall Mounted Split System take?
This unit is dispatched in 2-3 working days. Delivery is then 1–2 working days to most UK mainland addresses, and 3–6 working days into the EU.
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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
173 kWh/yr
EER 11
Standard model
237 kWh/yr
EER 8
Est. saving
£17.48
65 kWh/yr less
Estimate based on the unit's energy-rating efficiency factor and cooling capacity (18,000 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 6 kW heat output used 5 hrs/day over a 150-day UK heating season at £0.27/kWh.
Electric heater / season
£1187
This AC / season
£396
You save / season
£791
~67% less electricity
| Heating method | Electricity / season | Cost / season | Efficiency | Summer cooling |
|---|---|---|---|---|
| This heat-pump AC | 1465 kWh | £396 | Up to 300% | |
| Plug-in electric heater | 4396 kWh | £1187 | 100% | |
| Electric storage heater | 4396 kWh | £1187 | 100% |
Heat output estimated from this unit's 20,000 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 →
Share your savings
This heat-pump AC costs only £396/season to heat a room vs £1187 for an electric heater - that's £791 saved. https://stockool.store/products/fujitsu-airstage-km-5-2kw-split
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