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Hitachi airHome 800 2.5kW Flagship Wall Mounted Split System Air Conditioner

In StockEnergy A+++

£1,443.54£1,473.00Save £29.46

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

2-4 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.

The Hitachi airHome 800 2.5kW represents the pinnacle of residential split-system engineering, combining whisper-quiet 19 dB(A) operation with stellar A+++ energy efficiency. Tailored specifically for bedrooms and upscale residential interiors, this unit delivers 8,500 BTU cooling and 11,000 BTU heating with unmatched climate refinement. Built-in smart home automation links through airCloud Go to enable automated geofencing, intelligent scheduling, and seamless integration with Alexa and Google Assistant. Hitachi's automated FrostWash self-cleaning cycle prevents bacteria, dust, and allergen accumulation directly on internal components, safeguarding interior air purity year-round. Featuring sophisticated aesthetic styling, this premium split heat pump delivers maximum comfort with minimal power draw. Certified UK F-Gas installation is required to complete installation and refrigeration line connections.

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

Amazon AlexaGoogle HomeairCloud Go

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

Cooling Capacity

8,500 BTU

Energy Rating

A+++

Recommended Room

15-25 m²

Technical documents & videos

Official Hitachi manual

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

Full Model Line Catalogue

Hitachi catalogue — open the official flipbook in a new tab.

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

Full Specifications

Cooling Capacity8,500 BTU

Recommended Room Size15-25 m²

Energy RatingA+++

Smart HomeAmazon Alexa, Google Home, airCloud Go

Noise Level—

CategorySplit System AC

SKUHIT-AH800-25-SET

Physical dimensions

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

Description

Compare similar units

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

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Hitachi airHome 800 2.5kW Flagship Wall Mounted Split System Air Conditioner

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Toshiba

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Cooling Capacity

8,500 BTU

Room Size

15-25 m²

Up to 25m²

Up to 20m²

Up to 25m²

Energy Rating

A+++

A++

A+++

Heating Capable

Yes (heat pump)

Smart Home

Amazon Alexa, Google Home, airCloud Go

Not built-in

Amazon Alexa, Google Home

Stock

In Stock

Price inc VAT

£1,443.54

£825.00

£1,970.00

Common questions about the Hitachi airHome 800 2.5kW Flagship Wall Mounted Split System Air Conditioner

How many BTU is the Hitachi airHome 800 2.5kW Flagship Wall Mounted Split System Air Conditioner?

The Hitachi airHome 800 2.5kW Flagship Wall Mounted Split System Air Conditioner has a cooling capacity of 8,500 BTU, suitable for 15-25 m².

What room size is the Hitachi airHome 800 2.5kW Flagship Wall Mounted Split System Air Conditioner suitable for?

The Hitachi airHome 800 2.5kW Flagship Wall Mounted Split System Air Conditioner is recommended for rooms 15-25 m².

Can I install the Hitachi airHome 800 2.5kW Flagship Wall Mounted Split System Air Conditioner 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 Hitachi airHome 800 2.5kW Flagship Wall Mounted Split System Air Conditioner smart-home compatible?

Yes — the Hitachi airHome 800 2.5kW Flagship Wall Mounted Split System Air Conditioner supports Amazon Alexa, Google Home, airCloud Go for app and voice control.

How long does delivery of the Hitachi airHome 800 2.5kW Flagship Wall Mounted Split System Air Conditioner take?

This unit is 2-4 working days. Delivery is then 1–2 working days to most UK mainland addresses, and 3–6 working days into the EU.

Annual energy savings estimate

How much this A+++-rated unit could save versus a standard C-rated model, based on your usage.

Electricity tariff (£/kWh)Hours per dayCooling months/year

This unit

64 kWh/yr

EER 14

Standard model

112 kWh/yr

EER 8

Est. saving

£12.97

48 kWh/yr less

Estimate based on the unit's energy-rating efficiency factor and cooling capacity (8,500 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 3 kW heat output used 5 hrs/day over a 150-day UK heating season at £0.27/kWh.

Electric heater / season

£653

This AC / season

£218

You save / season

£435

~67% less electricity

Heating method	Electricity / season	Cost / season	Efficiency
This heat-pump AC	806 kWh	£218	Up to 300%
Plug-in electric heater	2418 kWh	£653	100%
Electric storage heater	2418 kWh	£653	100%

Heat output estimated from this unit's 11,000 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 £218/season to heat a room vs £653 for an electric heater - that's £435 saved. https://stockool.store/products/hitachi-airhome-800-2-5kw-flagship-wall-split

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