Haier Flexis Plus AS35S2SF1FA / 1U35S2SM1FA
Single splitA+++ Heats too

Haier

Flexis Plus AS35S2SF1FA / 1U35S2SM1FA

Haier's quiet value champion: A+++ cooling and a remarkably low 17 dB(A) indoor noise floor at a price well below the Japanese premium brands.

€1,100

List price

SCOP corrected to 5.1 / A+++ heating per Haier official Flexis Plus datasheet (catalog previously listed SCOP 4.6 / A++ heating)

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Units like this are usually quoted and fitted by a specialist installer. Compare it against models you can buy today.

Will it cool your room?

Room size (assumed)35 m² ≈ 377 sq ft
Fits a 35 m² room

This unit's cooling matches a 35 m² room. Set your room size to check the fit for your space.

Installation cost

$2,500-6,000 fully installed for a typical room (the equipment is roughly $700-1,800, professional installation roughly $1,500-4,000+ depending on line-set run, electrical and access). The unit price you see here is hardware only; installation is the larger, separate cost.

A typical range for this system type, for comparison only, not a quote for this unit. The actual price depends on the line-set run, electrical work and access.

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At a glance

Best for light-sleeping owners who want near-silent cooling in a bedroom without paying premium prices.

Cooling
3.5 kW
Size
Slim
Noise
17 dB
Silent
Install: Certified installerPermission: Usually needs permission

Performance

Cooling capacity
3.5 kW · 12,000 BTU
Heating capacity
3.6 kW
Room coverage
25–35 m²
SEER (cooling)
8.5
SCOP (heating)
5.1
Energy class (cooling)
A+++
Energy class (heating)
A++
Annual energy (cooling)
144 kWh

Noise, size & features

Model number
AS35S2SF1FA / 1U35S2SM1FA
Indoor noise
17 dB(A)quieter than a whisper
Outdoor noise
47 dB(A)
Indoor unit
300 x 856 x 197 mm (HxWxD)
Outdoor unit
553 x 800 x 275 mm (HxWxD)
Refrigerant
R32
Wi-Fi / app
Yes
Outdoor unit needed
Yes

What is good

  • Among the quietest indoor units at just 17 dB(A)
  • A+++ cooling at a competitive price
  • Built-in Wi-Fi with hOn app
  • Available in matt white or matt black

What to watch

  • Heating class A++ rather than A+++
  • Brand perceived as value rather than premium
  • Self-clean cycle adds run time

Installation & the rules that apply

This is a single split. This is where regulation bites. Breaking into the refrigerant circuit must be done by an F-gas certified installer (in the EU and UK), and single-split systems may use refrigerant indefinitely only if its GWP is under 750 (R32 qualifies). DIY voids the warranty, home insurance and is an offence. The outdoor unit alters the facade, so a prior declaration to the town hall (e.g. France), planning permission, or freeholder, landlord and condominium consent is commonly needed, plus heritage rules in protected zones and minimum-distance and noise rules toward neighbours.

Installation

Certified installer

Refrigerant

R32

BelgiumCopropriete authorisation for shared partsReviewed June 2026Often blocks install
BelgiumCertified refrigeration technician required for split installsReviewed June 2026Often blocks install
FranceRenters need the landlord's written consent for a fixed unitReviewed June 2026Often blocks install
FranceCopropriete authorisation by the assemblee generaleReviewed June 2026Often blocks install
FranceArchitecte des Batiments de France in protected / heritage zonesReviewed June 2026Often blocks install
See full rules by region

Common questions about the Haier Flexis Plus AS35S2SF1FA / 1U35S2SM1FA

How loud is the Haier Flexis Plus AS35S2SF1FA / 1U35S2SM1FA?
17 dB(A) indoors, quieter than a whisper.
How energy-efficient is the Haier Flexis Plus AS35S2SF1FA / 1U35S2SM1FA?
Its efficiency rating is SEER 8.5.
What size room does the Haier Flexis Plus AS35S2SF1FA / 1U35S2SM1FA cool?
It is rated to cool a room 25–35 m² (3.5 kW · 12,000 BTU).
Do I need a professional to install the Haier Flexis Plus AS35S2SF1FA / 1U35S2SM1FA?
Yes. As a single split it needs a certified installer. Usually needs permission.
Does the Haier Flexis Plus AS35S2SF1FA / 1U35S2SM1FA heat as well as cool?
Yes. It also heats, rated 3.6 kW of heating output.

Is a split even the right type?

Compare splits against the other types on price, noise, efficiency and install.