Hitachi AirHome-400 Wall Mounted Air Conditioning RAK-DJ18RHAE / RAC-DJ18WHAE

Hitachi AirHome-400 Air Conditioning RAK-DJ18RHAE / RAC-DJ18WHAE 2.0kW (6100 BTU) Wall Mounted Inverter, + Wi-Fi 

The Hitachi airHome 400 RAK-DJ18RHAE (indoor) and RAC-DJ18WHAE (outdoor) is a high-efficiency wall mounted split air conditioning system designed for bedrooms, small living areas, apartments and home offices.With a nominal cooling capacity of 2.00kW (approximately 6100 BTU/h) and a nominal heating capacity of 2.50kW (approximately 8500 BTU/h), this system delivers reliable year-round climate control using advanced inverter heat pump technology.Engineered for residential comfort, energy efficiency and smart connectivity, the airHome 400 range combines performance with low operating noise and integrated cleaning features.

Cooling & Heating Performance

• Nominal Cooling Capacity: 2.00kW (range 0.90–2.50kW)

• Nominal Heating Capacity: 2.50kW (range 0.90–3.20kW)

• SEER (Seasonal Energy Efficiency Ratio): 7.5 – A++

• SCOP (Seasonal Coefficient of Performance): 4.6 – A++

• Cooling Operating Range: –10°C to +46°C

• Heating Operating Range: –15°C to +21°C

The A++ seasonal efficiency ratings confirm strong performance in both cooling and heating modes, helping to reduce energy consumption while maintaining consistent comfort.

Inverter Heat Pump Technology

The DC inverter compressor automatically adjusts its output depending on room demand. This provides:

• Stable indoor temperature

• Reduced energy waste

• Lower noise during steady operation

• Improved overall efficiency

Unlike fixed-speed systems, inverter technology avoids constant on/off cycling, improving long-term comfort and performance.

Smart WiFi Control – airCloud Go

This model includes built-in WiFi connectivity via the Hitachi airCloud Go platform.

Control your air conditioning remotely with:

• On/off operation

• Temperature control

• Weekly scheduling

• Mode adjustment

• Energy monitoring

The system is compatible with Amazon Alexa and Google Home via app integration.

FrostWash Self-Cleaning Technology

Hitachi’s FrostWash function freezes dust and particles on the heat exchanger before melting and flushing them away. This helps maintain airflow performance and supports long-term system efficiency.

Mold Guard Function

After operation, Mold Guard helps dry internal components to reduce moisture retention and support cleaner internal airflow conditions.

Sound Performance

Designed for quiet residential use:

Indoor Unit (RAK-DJ18RHAE)

• Sound Pressure Level: 20 / 24 / 30 / 34 / 38 dB(A)

• Sound Power Level: 51 dB(A)

Outdoor Unit (RAC-DJ18WHAE)

• Sound Pressure Level: 46 dB(A)

• Sound Power Level: 59 dB(A)

Low indoor sound pressure levels make this system suitable for bedrooms and study areas.

Dimensions & Weight

Indoor Unit

• Dimensions (W × H × D): 780 × 280 × 222 mm

• Weight: 7.7 kg

Outdoor Unit

• Dimensions (W × H × D): 660 × 530 × 278 mm

• Weight: 23 kg

Compact dimensions allow flexible wall installation in residential properties.

Installation & Technical Details

• Power Supply: 220–240V / 1 Phase / 50Hz

• Refrigerant Type: R32

• Liquid Pipe Size: 1/4″

• Gas Pipe Size: 3/8″

• Maximum Pipe Length: 20 metres

• Maximum Elevation Difference: 10 metres

Suitable Applications

• Bedrooms

• Home offices

• Small apartments

• Residential rooms requiring compact wall mounted air conditioning