Hitachi 1.5 Ton 5 Star Inverter Split AC (Copper, RSOS518HEEA)

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Build Aspect

Hitachi ACs high quality products and the Enzen 5100X series of Inverter ACs are are absolutely true to that notion. For starters both the IDU and ODU units are strong and well build. Moreover the indoor unit feels elite and very premium. It has an elegance which is quite rare in Air Conditioners and Hitachi has the knack of making them very niche and inspiring. Even the remote control unit is very handy and therefor intuitive and a “breeze” to use.

Performance Aspect

This Enzen Series AC is a fantastic performer and we are not particularly surprised, reason being that firstly its a Hitachi and secondly it has 19000 BTU/hour. Taking a sidebar with the fan we find that the airflow has a truly fantastic 620 CFM, however that is controllable in just 3 steps unlike the RSRG518HEEA Kiyora AC which has 5 steps. In wake of all the performance it imperative that we make a special note of its absolutely stunning ISEER of 4.55 w/w and the super silent and low at 34db operation. We are not cross but it would have been definitely a bonus to gave 4 way auto swing mechanism. Having said that this is simple one of the best 5 star 1.5 Ton split AC with which you simply cannot go wrong.

Also: Do View This Superb AC from LG too on Amazon before finalizing.


Elite and premium looks.
Superb cooling performance 19000 BTU.
Strong blower fan of 620 CFM.
Impressive ISEER 4.55.


A bit expensive AC.
2 Way manual swing.
No PM 2.5 filter.

  • Split AC with inverter compressor: Variable speed compressor which adjusts power depending on heat load.
  • 1.5 Ton: – Suitable for medium sized rooms (111 to 150 sq ft)
  • Energy Rating: 5 Star: Best in class efficiency | Annual Energy Consumption (as per energy label): 897.84 units | ISEER Value: 4.55
  • Manufacturer Warranty: 2 years on AC, 10 years on Compressor, 5 years on Controller/PCB
  • Copper Condenser Coil: Better cooling and requires low maintenance
  • Key Features: Expandable Inverter Air Conditioners: Hitachi’s Expandable AC expands its capacity in adverse temperature conditions, it cuts down humidity level inside the room and achieves set temperature faster. Filter Clean Indicator: A unique alert reminds you to clean the filter at regular intervals, ensuring powerful cooling all the time. Stabiliser Free Operation: Have compӏete protection from power fӏuctuation that ranges from 160V to 255V with more savings, Penta Sensor: Hitachi’s intelligent Penta sensor technology with its advanced microcontroller offers perfect cooling even in extreme summer conditions, optimises cooling in load variation and protects critical components of the AC Stepless Compressor Control: Specially designed advanced microcontroller checks indoor and outdoor condition, and varies compressor speed seamlessly, thus offering uninterrupted cooling, 100% Cooling Capacity at 43 Degree Celsius: Hitachi ACs are designed to provide 100% cooling performance even in extreme summer conditions.
  • Special Features: SuperFine Mesh Filter: Hitachi’s unique SuperFine mesh filter captures microdust particle and also offers hassle-free cleaning Tropical Design: Hitachi ACs are designed to keep you cool and work efficiently up to 52°C.
  • Refrigerant gas: R410a – Environmental friendly – no ozone depletion potential
  • IDU dimension(l * b* h cms): (99.7 * 25.3 * 29.4 cms), ODU dimension (75 * 28.8 * 54.8 cms) & IDU (13 kg) and ODU Weight (32.40 kgs)
  • Included in the box: For Split AC : Indoor Unit, Outdoor Unit, Remote Control, User manual, 2 batteries


Model : RSOS518HEEA (Enzen 5100X) / RSOS518HEEA/

Tonnage : 1.5

Compressor : Twin Rotary / R410A

Rated cooling : 18000 BTU / 5275 Watts

Max cooling : 19000 BTU / 5568 Watts

Rated ISEER : 4.55

Annual power consumption as per BEE norms : 897.87

Fan speed steps : 3

Max Air flow Indoor : 620 CFM

Sound level Indoor (slow fan speed) : 34 db

Power input / current drawn : 1540 w / 7.05 amps

IDU dimensions : 997 * 294 * 253 mm

ODU dimensions : 750 * 548 * 288 mm

Net weight IDU / ODU : 13.0 / 32.40 KG


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