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Akai Mistral Smart Multi-Split 9000 + 12000 BTU Wall Mounted Air Conditioner with Heat Pump

In Stock

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

£878.90

Next working day dispatch — held in UK stock

UK-Wide Delivery

Free UK mainland delivery on in-stock units

Retail prices include VAT.

Akai Mistral Smart Multi-Split 9000 + 12000 BTU Wall Mounted Air Conditioner with Heat Pump. One outdoor condenser feeds both indoor heads, so a single outdoor position serves two rooms. Supplied ready for F-gas installation, with fitting matched to a certified engineer if you need it. Available through Stockool with UK warranty and next-day-capable fulfilment.

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.

Smart guide

Wi-Fi / app control

Free UK mainland delivery on in-stock units
Manufacturer warranty included
14-day returns

Cooling Capacity

21,000 BTU

Technical documents & videos

Official Akai manual

The manufacturer's PDF for this model is being sourced and will be downloadable here.

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

Full Specifications

Cooling Capacity21,000 BTU

Recommended Room Size—

Energy Rating—

Smart HomeApp / Wi-Fi control

Noise Level—

CategoryMulti-Split System AC

SKUmistral-9k12k

Physical dimensions

Exact dimensions for this model are being confirmed with Akai — ask us and we will send the cut sheet with mounting and clearance figures.

Description

Compare similar units

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

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Akai Mistral Smart Multi-Split 9000 + 12000 BTU Wall Mounted Air Conditioner with Heat Pump

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LG MU3R21.U21 6.2kW Multi-Split Outdoor Unit

Cooling Capacity

21,000 BTU

Room Size

—

Up to 75m² total

Up to 70m² total

Energy Rating

—

A++

Heating Capable

Yes (heat pump)

Smart Home

Yes

Google Home, Amazon Alexa

Stock

In Stock

Price inc VAT

£878.90

£933.90

£1,461.18

£2,164.18

Common questions about the Akai Mistral Smart Multi-Split 9000 + 12000 BTU Wall Mounted Air Conditioner with Heat Pump

How many BTU is the Akai Mistral Smart Multi-Split 9000 + 12000 BTU Wall Mounted Air Conditioner with Heat Pump?

The Akai Mistral Smart Multi-Split 9000 + 12000 BTU Wall Mounted Air Conditioner with Heat Pump has a cooling capacity of 21,000 BTU, suitable for its recommended room size.

What room size is the Akai Mistral Smart Multi-Split 9000 + 12000 BTU Wall Mounted Air Conditioner with Heat Pump suitable for?

Use our BTU Calculator to check whether this unit is right for your room size.

Can I install the Akai Mistral Smart Multi-Split 9000 + 12000 BTU Wall Mounted Air Conditioner with Heat Pump 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 Akai Mistral Smart Multi-Split 9000 + 12000 BTU Wall Mounted Air Conditioner with Heat Pump smart-home compatible?

Yes — the Akai Mistral Smart Multi-Split 9000 + 12000 BTU Wall Mounted Air Conditioner with Heat Pump supports for app and voice control.

How long does delivery of the Akai Mistral Smart Multi-Split 9000 + 12000 BTU Wall Mounted Air Conditioner with Heat Pump take?

This unit is next working day dispatch — held in uk stock. Delivery is then 1–2 working days to most UK mainland addresses, and 3–6 working days into the EU.

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

£1246

This AC / season

£415

You save / season

£831

~67% less electricity

Heating method	Electricity / season	Cost / season	Efficiency
This heat-pump AC	1539 kWh	£415	Up to 300%
Plug-in electric heater	4616 kWh	£1246	100%
Electric storage heater	4616 kWh	£1246	100%

Heat output estimated from this unit's 21,000 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 £415/season to heat a room vs £1246 for an electric heater - that's £831 saved. https://stockool.store/products/akai-mistral-smart-multi-split-9000-plus-12000-btu-wall-mounted-air-co

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