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Fujitsu Airstage KM Series 3.4kW Wall Mounted Split System
Fujitsu

Fujitsu Airstage KM Series 3.4kW Wall Mounted Split System

In StockEnergy A++

Available to order — dispatched on the lead time shown below.

£828.36£1,050.00Save £221.64

Trade pricing available — apply or sign in for your trade rate

Dispatched in 2-3 working days
UK-Wide Delivery
Free UK mainland delivery on in-stock units
🇪🇺 EU Delivery available
Dispatched in 3–7 working days, then 5–10 working days EU transit
Orders under €150 ship VAT-paid at checkout (IOSS, no charges on delivery). Orders of €150 or more ship DDU — import VAT and customs duty are collected by the courier on delivery.

Retail prices include VAT.

Upgrade your living space with the Fujitsu Airstage KM Series 3.4kW split system, a powerful and efficient air conditioning unit designed for larger rooms. This model combines high-capacity cooling with a sophisticated, minimalist aesthetic that complements any interior decor. Featuring built-in Wi-Fi, it offers convenient app-based control, allowing you to adjust settings remotely for maximum comfort upon arrival. The unit is built with Fujitsu's renowned inverter technology, which significantly reduces energy bills by adjusting power output based on real-time demand. Its reverse-cycle heat pump functionality makes it a versatile choice for the UK climate, providing reliable warmth in winter and refreshing cooling in summer. Designed for quiet operation, it ensures your environment remains peaceful while maintaining the perfect temperature. This system is a top-tier choice for homeowners seeking a durable, smart, and energy-efficient solution for medium-to-large living areas or open-plan spaces.

1

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.

Google HomeAmazon Alexa
  • Free UK mainland delivery on in-stock units
  • Manufacturer warranty included
  • 14-day returns

Cooling Capacity

12,000 BTU

Energy Rating

A++

Recommended Room

Up to 35m²

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.

Open
All Fujitsu catalogues and rangesMissing a document? Ask our team and we will send it over.

Full Specifications

Cooling Capacity12,000 BTU
Recommended Room SizeUp to 35m²
Energy RatingA++
Smart HomeGoogle Home, Amazon Alexa
Noise Level—
CategorySplit System AC
SKUASYG12KMCC-AOYG12KMCC

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

Upgrade your living space with the Fujitsu Airstage KM Series 3.4kW split system, a powerful and efficient air conditioning unit designed for larger rooms. This model combines high-capacity cooling with a sophisticated, minimalist aesthetic that complements any interior decor. Featuring built-in Wi-Fi, it offers convenient app-based control, allowing you to adjust settings remotely for maximum comfort upon arrival. The unit is built with Fujitsu's renowned inverter technology, which significantly reduces energy bills by adjusting power output based on real-time demand. Its reverse-cycle heat pump functionality makes it a versatile choice for the UK climate, providing reliable warmth in winter and refreshing cooling in summer. Designed for quiet operation, it ensures your environment remains peaceful while maintaining the perfect temperature. This system is a top-tier choice for homeowners seeking a durable, smart, and energy-efficient solution for medium-to-large living areas or open-plan spaces.

Compare similar units

Side-by-side specs for other split system ac in a similar BTU range.

This Unit
Fujitsu Airstage KM Series 3.4kW Wall Mounted Split System

Fujitsu

Fujitsu Airstage KM Series 3.4kW Wall Mounted Split System

Samsung 12000 BTU Smart A++ Wall Mounted Split Air Conditioner with Heat Pump

Samsung

Samsung 12000 BTU Smart A++ Wall Mounted Split Air Conditioner with Heat Pump

Midea Comfee 12000 BTU Smart A++ Wall Mounted Split Air Conditioner with Heat Pump

Midea

Midea Comfee 12000 BTU Smart A++ Wall Mounted Split Air Conditioner with Heat Pump

TCL 12000 BTU Smart A++ Wall Mounted Split Air Conditioner with Heat Pump

TCL

TCL 12000 BTU Smart A++ Wall Mounted Split Air Conditioner with Heat Pump

Cooling Capacity
12,000 BTU
12,000 BTU
12,000 BTU
12,000 BTU
Room Size
Up to 35m²
—
—
—
Energy Rating
A++
A++
A++
A++
Heating Capable
Yes (heat pump)
Yes (heat pump)
Yes (heat pump)
Yes (heat pump)
Smart Home
Google Home, Amazon Alexa
Yes
Yes
Yes
Stock
In Stock
In Stock
In Stock
In Stock
Price inc VAT
£828.36
£604.97
£417.97
£405.90

Common questions about the Fujitsu Airstage KM Series 3.4kW Wall Mounted Split System

How many BTU is the Fujitsu Airstage KM Series 3.4kW Wall Mounted Split System?

The Fujitsu Airstage KM Series 3.4kW Wall Mounted Split System has a cooling capacity of 12,000 BTU, suitable for Up to 35m².

What room size is the Fujitsu Airstage KM Series 3.4kW Wall Mounted Split System suitable for?

The Fujitsu Airstage KM Series 3.4kW Wall Mounted Split System is recommended for rooms Up to 35m².

Can I install the Fujitsu Airstage KM Series 3.4kW 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 3.4kW Wall Mounted Split System smart-home compatible?

Yes — the Fujitsu Airstage KM Series 3.4kW Wall Mounted Split System supports Google Home, Amazon Alexa for app and voice control.

How long does delivery of the Fujitsu Airstage KM Series 3.4kW 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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Annual 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

£801

This AC / season

£267

You save / season

£534

~67% less electricity

Heating methodElectricity / seasonCost / seasonEfficiencySummer cooling
This heat-pump AC989 kWh£267Up to 300%
Plug-in electric heater2967 kWh£801100%
Electric storage heater2967 kWh£801100%

Heat output estimated from this unit's 13,500 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 £267/season to heat a room vs £801 for an electric heater - that's £534 saved. https://stockool.store/products/fujitsu-airstage-km-3-4kw-split

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