Fujitsu Airstage KM Series 4.2kW Wall Mounted Split System
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The Fujitsu Airstage KM Series 4.2kW split system is the ideal choice for larger rooms or open-plan living areas that require robust climate control. This high-performance unit delivers rapid cooling and heating, ensuring your space reaches the desired temperature quickly and efficiently. With its integrated Wi-Fi module, you can easily monitor and control your home environment via a smartphone app, providing ultimate convenience and energy management. The system utilizes advanced R32 refrigerant technology, which is more environmentally friendly and efficient than older alternatives. Its sleek, modern design ensures it remains unobtrusive, while the quiet operation mode makes it perfect for living rooms where comfort and silence are paramount. As a reverse-cycle heat pump, it provides an excellent alternative to traditional heating systems during the winter months. This unit requires professional installation, guaranteeing a high-quality setup that will provide years of reliable, energy-efficient service for your home.
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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
Specifications
Description
The Fujitsu Airstage KM Series 4.2kW split system is the ideal choice for larger rooms or open-plan living areas that require robust climate control. This high-performance unit delivers rapid cooling and heating, ensuring your space reaches the desired temperature quickly and efficiently. With its integrated Wi-Fi module, you can easily monitor and control your home environment via a smartphone app, providing ultimate convenience and energy management. The system utilizes advanced R32 refrigerant technology, which is more environmentally friendly and efficient than older alternatives. Its sleek, modern design ensures it remains unobtrusive, while the quiet operation mode makes it perfect for living rooms where comfort and silence are paramount. As a reverse-cycle heat pump, it provides an excellent alternative to traditional heating systems during the winter months. This unit requires professional installation, guaranteeing a high-quality setup that will provide years of reliable, energy-efficient service for your home.
Winter heating cost: this AC vs electric heaters
This unit reverses to heat your room in winter. Based on its 5 kW heat output used 5 hrs/day over a 150-day UK heating season at £0.27/kWh.
Electric heater / season
£950
This AC / season
£317
You save / season
£633
~67% less electricity
| Heating method | Electricity / season | Cost / season | Efficiency | Summer cooling |
|---|---|---|---|---|
| This heat-pump AC | 1172 kWh | £317 | Up to 300% | |
| Plug-in electric heater | 3517 kWh | £950 | 100% | |
| Electric storage heater | 3517 kWh | £950 | 100% |
Heat output estimated from this unit's 16,000 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 →