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Hitachi  |  SKU: HIT-AH18-400

Hitachi AirHome 400 5.0kW System

High Street: £1,380.00 High Street: £1,150.00
Our Price:
£965.99 Inc. VAT £804.99 Exc. VAT

Home AC that’s easy to use, makes daily life more convenient, and comes with integrated self-maintenance technology that help to improves the long-term performance of the unit.

airHome is the system for people who don’t want to think about Air Conditioning.

FREE delivery on all items

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Delivery & Returns

Timescales are dependent on the product, but for the majority of items we send on a next working day delivery. If we can't get it sent on a next working day delivery, then standard delivery is up to 5 working days. Other than small items and accessories we will contact you to confirm the delivery date to ensure you will be available to receive delivery.

For FGAS systems and Multi-Split systems we will need details of the installation engineer from you, and confirm those with the engineer before we can proceed with the item delivery.

Orders can be sent the same day if placed before 12pm (Mon-Fri) and we have confirmed that the next-working day is suitable with you via phone or email.

For urgent next-working day deliveries please place your order online and contact us to ensure we can verify the delivery day swiftly and organise shipping.

Deliveries will be between 8.30am and 6pm and we request that you are available at those times, otherwise the order will be returned and we may have to issue a non-delivery fee.

Lightweight/low value items are normally despatched on a next working day courier service, and we can offer a 2-hour delivery slot text message on the day.

Please contact us if you have any special delivery requirements eg delivery via tail lift vehicles, weekend deliveries, timed deliveries, unpaved or narrow pathways etc.


Read our comprehensive FAQ page which provides answers to queries around system types and installation.

Go to FAQs

CoolEasy says:

Up to 45m²


An AC solution that cares for itself!
Cleans & maintains itself year after year - No need to think about it

airCloud Home

Control your AC from anywhere
Automatically adjusts the temperature as you arrive home or leave the house
Monitor energy costs
Works with Google Home and Amazon Alexa

Frost Wash

Over time dust and dirt can build up in your AC reducing the amount of air that can flow through it and making it less powerful over time.
Hitachi Frost Wash technology helps to maintain the performance of your AC for years to come by freezing dust and dirt, heating it and washing it away.
Our tests show that systems with Frost Wash are 3 times better at maintaining air flow performance than those without this technology*

Stops the causes of AC odors
Whenever the unit is switched off, the mould guard function automatically heats internal components to prevent the build-up of mould (the primary cause of those nasty odours)

Heat and freezing shock, extreme humidity, torrential rain, voltage surges, lightning strikes, impacts and more... every air conditioner we sell has been tested to the extreme. In addition, our unique safeguard System combines electrical and mechanical systems to protect the outdoor unit from extreme weather and voltage fluctuation

Automatically removes up to 99% of viruses and pollutants
Combining up to 3 different air purification technologies for enhanced effectiveness against pollutants including viruses, bacteria and mould. The pre-filter, air purification filter, and heat exchanger cleaner all work together with up to 99% effectiveness on viruses**, up to 99% effectiveness on bacteria*** and up to 95% reduction of mould****

* Two identical units were tested for comparison; with and without Frost Wash. Test chamber simulated approx. 2 years of dust and oil build up which may be experienced in a typical home environment. Airflow performance was tested before and after being in the chamber. Unit without Frost Wash experienced an 18% drop in airflow performance. Unit with Frost Wash experienced only 6% performance drop. Tested at Johnson Controls-Hitachi Tochigi factory, Japan Nov/Dec 2021.
** An air conditioner is not a replacement for any COVID control measure recommended by governments or medical professionals. ViroSense Z1 filter shows 99% effectiveness against Influenza A Virus (H3N2) tested at Japan Textile Product Quality and Technology Center using ISO18184 method. FrostWash technology also showed 99% reduction of virus particles on the heat exchanger tested at Kitasato Research Center of Environmental Science.
*** Claim refers to the effect of ViroSense Z1 filter (optional on some models) which showed 99% reduction of Staphylococcus aureus NBRC12732 and Escherichia coli NBRC3301 bacteria particles under lab conditions tested at Nissenken Quality Evaluation Center Japan, and also Frost Wash technology which showed 99% reduction of bacteria on the heat exchanger tested at Kitasato Research Center of Environmental Science Japan.
**** Claim refers to the effect of Frost Wash which showed 95% reduction of mould on the heat exchanger tested at Kitasato Research Center of Environmental Science.

**All split type air conditioning systems require installation (or at least commissioning) by an F-GAS registered engineer**


  • Nominal Capacity (Min. - Max.):
  • COOLING (KW): 5.00 (1.90- 5.20)
  • HEATING (KW): 6.00 (2.20- 7.30)
  • Energy efficiency:
  • SEER: 7
  • SCOP: 4.5
  • Energy Rating (Energy class):
  • COOLING: A++
  • Heating function (FOR WINTER HEATING): Yes
  • Mold Guard Function (PREVENTS BUILD-UP OF MOLD): Yes
  • Air Purification Filter (VIROSENSE Z1 FILTER): Yes
  • Ionizer: AQTIV-ION
  • Power Supply (V / PHASE / HZ): 220-240V / 1Ph / 50Hz
  • Nominal Cooling Power Input (Min. - Max.)(WATTS): 1548 (500 - 2100)
  • Nominal Heating Power Input (Min. - Max.)(WATTS): 1617 (500 - 2750)
  • Starting Current (cooling/heating) (AMPS): 7.11/7.42
  • Running Current (cooling/heating) (AMPS): 2.17-9.13/2.17-11.96
  • Operation Range:
  • COOLING (ºC): -10 ~ 46
  • HEATING (ºC): -15 ~ 21
  • Refrigerant Type: R32
  • Compressor Type: 2 Cylinder Rotary
  • Diameter of Pipes:
  • LIQUID (INCH): 1/4"
  • GAS (INCH): 3/8"
  • Maximum Pipe Length (M): 20
  • Maximum Piping Elevation (M): 10
  • Dehumidification (L / H): 2
  • Indoor Unit Dimensions: Indoor Unit Dimensions
  • HEIGHT (MM): 280
  • WIDTH (MM): 780
  • DEPTH (MM): 222
  • WEIGHT (KG): 8.4
  • AIR FLOW (MAX.)(M³/H): 663
  • SOUND POWER (dB(A): 60
  • SOUND PRESSURE (dB(A): 25/31/37/42/47
  • Outdoor Unit:
  • HEIGHT (MM): 600
  • WIDTH (MM): 792
  • DEPTH (MM): 299
  • WEIGHT (KG): 39.1
  • SOUND POWER (dB(A): 64


Installation Info

The below information is a general guide and not for any specific air con system.

The installation will require the services of an F-GAS registered engineer, who will be trained and have experience of installing these systems

Indoor Unit - Pre-checks

  • Ensure there is no source of heat or steam nearby.
  • Ensure there is nothing stopping the installation of the unit before drilling holes.
  • Do not mount above a shelf or a cupboard that could restrict air circulation.
  • For the unit to work effectively in cooling mode, it must be mounted 2m off the ground or above head height.
  • Make sure the installation wall is suitably secure.

Outdoor Unit – Pre-Checks

  • If you erect a canopy to protect the unit from rain and sun, DO NOT obstruct the heating dispersion for the condenser.
  • Don't keep animals or plants near the outdoor unit as the hot and cold air discharge will cause discomfort.
  • Make sure to have the distance specified in the installation manual (provided by each manufacturer) between ceiling, wall, furniture and other obstacles.
  • Do not mount near flammable gas tanks.
  • The mounting brackets/mounting plate or mounting feet for the unit must be secure, flat and level.
  • The outdoor unit must be secure, flat and level.

Installation Of The Air Conditioning System

Your chosen F-GAS registered engineer will aid you to select the best location for the indoor unit (Evaporator) and outdoor unit (Condenser) to be positioned.

You may also need to employ the services of an electrician, to supply mains power to the outdoor unit’s location. If in doubt, discuss this with your chosen air conditioning engineer.

The engineer will likely book the installation in as a half day or full day job, depending on the chosen locations and complexities of the installation.

They will usually supply all parts and sundries required to complete the job, as most systems available are only supplied with an indoor unit, an outdoor unit and a remote control. There are various extra parts required to install an air conditioning system, this can include:

  1. Brackets or Feet
  2. Pipework and Lagging
  3. Electrical Cable
  4. Trunking
  5. Condensate Pumps
  6. Fixings and Fasteners
  7. Additional Refrigerant
  8. Plus many more items, depending on the type of system(s) being installed

It is best to speak with the engineer when discussing the quote given to carry out the installation, to see what is included.

Specialist tools are required to commission an air con system which your engineer will bring with them to install you system. Systems must be strength and pressure tested and held on a vacuum for long periods of time, to ensure they are going to operate effectively as possible and eliminate the risk of leaking refrigerant into the atmosphere.

Upon completion of the installation the engineer should issue you an F-GAS Commission Certificate.

Tech Sheets

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We strive to provide a reliable, professional, and friendly service. As a prominent renewable energy supplier in Britain, we offer competitive prices without compromising on energy efficiency. Our extensive range of climate control products ensures we cater to all domestic and commercial requirements, making us your go-to destination for heating and cooling solutions.

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Hitachi AirHome 400 5.0kW System

High Street: £1,380.00 High Street: £1,150.00
Our Price:
£965.99 Inc. VAT £804.99 Exc. VAT


Up to 45m²

Cooling Info

5.00kW (1.90- 5.20)

Heating Information

6.00kW (2.20- 7.30)

Energy level

Energy Rating = A++
SCOP = 4.5
SEER = 7

Noise level


Suitable for room sizes

Up to 45m²

Dimensions & weight

280mm x 780mm x 222mm Indoor / 600mm x 792mm x 299mm Outdoor
8.4kg Indoor / 39.1kg Outdoor

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