How loud is the Daikin 5MXM90A (5-room multi-split outdoor unit)?

19 dB(A) indoors, quieter than a whisper.

How energy-efficient is the Daikin 5MXM90A (5-room multi-split outdoor unit)?

Its efficiency rating is SEER 8.58.

Do I need a professional to install the Daikin 5MXM90A (5-room multi-split outdoor unit)?

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

Does the Daikin 5MXM90A (5-room multi-split outdoor unit) heat as well as cool?

Yes. It also heats, rated 10 kW.

Multi-splitA+++ Heats too

Daikin · Model 5MXM90A9

5MXM90A (5-room multi-split outdoor unit)

Name: Daikin 5MXM90A (5-room multi-split outdoor unit)
Brand: Daikin

Daikin's five-port flagship outdoor unit runs up to five indoor units, so one condenser can cool and heat a larger whole house while still hitting the top A+++ cooling class.

€3,300

List price

outdoor unit only; five indoor units and install extra (full system commonly 7000-10000 EUR installed)

No live retailer link for this model right now.

Performance

Cooling capacity: 9 kW · 30,700 BTU
Heating capacity: 10 kW
Total coverage: 70–120 m²
SEER (cooling): 8.58
SCOP (heating): 4.65
Energy class (cooling): A+++
Energy class (heating): A++
Annual energy (cooling): 367 kWh

Noise, size & features

Model number: 5MXM90A9
Indoor noise

What is good

One outdoor unit serves up to 5 separate rooms, ideal for a larger house
Top A+++ cooling class despite the large 9 kW capacity
A++ heating class with 10 kW output for whole-home winter heating
Mix any Daikin indoor styles (wall, floor console, ducted, cassette) on one system

What to watch

Large, heavy outdoor unit needing a robust mounting location
Highest total system cost in this list once five indoor units are added
All five rooms depend on the one outdoor unit working

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 Daikin 5MXM90A (5-room multi-split outdoor unit)

How loud is the Daikin 5MXM90A (5-room multi-split outdoor unit)?: 19 dB(A) indoors, quieter than a whisper.
How energy-efficient is the Daikin 5MXM90A (5-room multi-split outdoor unit)?: Its efficiency rating is SEER 8.58.
Do I need a professional to install the Daikin 5MXM90A (5-room multi-split outdoor unit)?: Yes. As a multi-split it needs a certified installer. Usually needs permission.
Does the Daikin 5MXM90A (5-room multi-split outdoor unit) heat as well as cool?: Yes. It also heats, rated 10 kW.

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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