How energy-efficient is the Hitachi RAM-G55N3HAE airHome Multi Pro?

Its efficiency rating is SEER 8.5.

Do I need a professional to install the Hitachi RAM-G55N3HAE airHome Multi Pro?

Yes. As a multi-split it needs a certified installer. Usually needs permission.

Does the Hitachi RAM-G55N3HAE airHome Multi Pro heat as well as cool?

Yes. It also heats, rated 6.8 kW.

Multi-splitA+++ Heats too

Hitachi

RAM-G55N3HAE airHome Multi Pro

Name: Hitachi RAM-G55N3HAE airHome Multi Pro
Brand: Hitachi

The Hitachi RAM-G55N3HAE airHome Multi Pro is a 5.5 kW R32 tri-split outdoor unit with class-leading A+++ cooling efficiency. One condenser drives up to three indoor heads, making it a tidy solution for a three-room flat or a home office plus two bedrooms.

€1,500

List price

Outdoor unit only; indoor heads (up to 3) selected and priced separately

No live retailer link for this model right now.

Performance

Cooling capacity: 5.5 kW · 18,000 BTU
Heating capacity: 6.8 kW
Total coverage: 40–90 m²
SEER (cooling): 8.5
SCOP (heating): 4.6
Energy class (cooling): A+++
Energy class (heating): A++
Annual energy (cooling): Not published

Noise, size & features

Model number: RAM-G55N3HAE

What is good

Top-tier A+++ cooling efficiency with a high SEER of 8.5
Connects up to three indoor units of mixed types from one condenser
Built-in Wi-Fi control via the Hitachi airCloud app
R32 refrigerant and twin-rotary inverter compressor for quiet, steady output

What to watch

Outdoor unit at 61 dB is on the louder side at full load
Price excludes indoor units, raising total project cost
Professional F-Gas install and commissioning required

Installation & the rules that apply

This is a multi-split. Same F-gas certified-installer requirement and sub-750 GWP refrigerant rule as a single split, applied across a bigger system. Because it touches multiple rooms and routes pipes through the structure, it more often triggers planning or prior-declaration steps, freeholder, landlord or condominium and shared-wall consent, and neighbour distance and noise rules. Heritage and historic-centre restrictions apply to the outdoor unit just as for a single split, but the single shared condenser is often easier to get approved than several separate units.

Installation

Certified installer

Refrigerant

R32

BelgiumCopropriete authorisation for shared partsReviewed June 2026Often blocks install

Common questions about the Hitachi RAM-G55N3HAE airHome Multi Pro

How energy-efficient is the Hitachi RAM-G55N3HAE airHome Multi Pro?: Its efficiency rating is SEER 8.5.
Do I need a professional to install the Hitachi RAM-G55N3HAE airHome Multi Pro?: Yes. As a multi-split it needs a certified installer. Usually needs permission.
Does the Hitachi RAM-G55N3HAE airHome Multi Pro heat as well as cool?: Yes. It also heats, rated 6.8 kW.

More multi-split units

Multi-splitA++

Hisense

2AMW42U4RGC Multi Split (dual)

The Hisense 2AMW42U4RGC is a compact 4.1 kW R32 dual-split outdoor unit that drives two indoor heads from one small, lightweight condenser. It is a budget-friendly way to cool and heat two rooms, such as a living room and bedroom, without a second outdoor box.

Cooling

4.1 kW