airHome 400

Wall Mounted Inverter Heat Pump AC

airHome 400

Wall Mounted Inverter Heat Pump AC

Home heat pump 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. It is the ideal heat pump for people who don’t want to think about heat pumps.
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Adjusts temperature as you arrive home or leave the house*

Use the airCloud Go smartphone app* to set up location awareness and temperature profiles, for example, detecting when you are on your way home and automatically adjusting the temperature ready for your arrival.

*Wifi access and airCloud Go Adapter (available as an optional accessory) required to pair airHome 400 and airCloud Go app.

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Voice control with Alexa and Google Home*

With the airCloud Go app* you can also connect to your smart speaker (compatible with Amazon Echo and Google Home), use weekly schedule and timer functions and see how much power has been consumed with the integrated Energy Cost Estimator.

*Wifi access and airCloud Go Adapter (available as an optional accessory) required to pair airHome 400 and airCloud Go app.

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Better at maintaining the performance of your heat pump

Over time dust and dirt can build up in your heat pump reducing the amount of air that can flow through it and making it less powerful over time.

Hitachi FrostWashTM technology helps to maintain the performance of your heat pump for years to come by freezing dust and dirt, melting it and washing it away. Our tests show that systems with FrostWash are better at maintaining air flow performance than those without this technology[1].

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Japanese brand, built to last

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. These protections include a 3-minute delay circuit to prevent damaged caused by multiple fast re-starts in the event of power cuts, an ODU valve cover to channel water and condensation safely away from the outdoor unit, anti-rust paint and heat fins, and a metal fireproof electrical enclosure to protect electronics inside the outdoor unit.

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Helps to purify your indoor air

Combining 3 different air purification technologies for enhanced effectiveness against pollutants including viruses and bacteria.

The washable pre-filter filters larger dust and dirt particles. FrostWash automatically cleans the heat exchanger, reducing mould, viruses and bacteria on the heat exchanger. The ViroSense Z1 air purification filter is effective at neutralising most viruses[2] and bacteria[3] that pass through the filter. 

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Vector DC Inverter technology

Our Cascade Vector DC Inverter System is equipped with a microchip to control the speed of the compressor. A split rotor with displaced electrical poles enables electromagnetic noise suppression and optimizes low-speed energy-efficiency.

With inverter technology, the heat pump cools with maximum capacity at start-up, then automatically slows down and operates at a minimal capacity to maintain room temperature at a comfortable level.

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6 Year Warranty

The airHome wall mounted range comes with a comprehensive 6 year warranty on parts and labour, so you can be assured of the reliability and quality of your airHome system.


[1] ... Two identical units were tested for comparison; with and without FrostWash. 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 FrostWash experienced an 18% drop in airflow performance. Unit with FrostWash experienced only 6% performance drop. Tested at Johnson Controls-Hitachi Tochigi factory, Japan Nov/Dec 2021.

[2] ... ViroSense Z1 filter shows 99.0% effectiveness against Influenza A Virus (H3N2) tested at Japan Textile Product Quality and Technology Center using ISO18184 method. FrostWash technology also showed 99.0% reduction of virus particles on the heat exchanger tested at Kitasato Research Center of Environmental Science

[3] ... Claim refers to the effect of ViroSense Z1-filter (optional on some models) which showed 99.0% reduction of Staphylococcus aureus NBRC12732 and Escherichia coli NBRC3301 bacteria particles under lab conditions tested at Nissenken Quality Evaluation Center Japan, and also FrostWash technology which showed 99.0% reduction of bacteria on the heat exchanger tested at Kitasato Research Center of Environmental Science Japan

Other Benefits

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Silent Mode
Specially curved fan blades reduce the buffeting noise of them cutting through the air at slower speeds.
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0.5°C temperature control
Set temperature in increments of 0.5°C
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Multiple Timers
6x On/Off time and temperature settings for each day of the week (using airCloud Go). Set a specific time interval for power off, up to 12 hours
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Save your favourite settings
Quickly activate your most-used combination of mode, temperature and fan speed with a dedicated button on the remote control


Manuals, brochures and other product literature. If you need any more information, please get in touch.