How loud is the Honeywell HF09 Wi-Fi?

52 dB(A) indoors, about as loud as a refrigerator.

What size room does the Honeywell HF09 Wi-Fi cool?

It is rated to cool a room 20–25 m² (2.6 kW · 9,000 BTU).

Do I need a professional to install the Honeywell HF09 Wi-Fi?

No. It is a portable monobloc you can fit yourself, no professional needed. No permission needed.

Portable monoblocA

Honeywell

HF09 Wi-Fi

Name: Honeywell HF09 Wi-Fi
Brand: Honeywell

A mainstream smart single-hose portable with app control for everyday medium-room cooling. It vents through a window with the included kit and needs no fitting.

€379

List price

unit only, plug-in, window kit included

No live retailer link for this model right now.

This is a plug-in unit (no installer needed); we just have no live retailer for it right now. Compare it against models you can buy today.

Performance

Cooling capacity: 2.6 kW · 9,000 BTU
Heating capacity: Cooling only
Room coverage: 20–25 m²
SEER (cooling): Not published
SCOP (heating): Not published
Energy class (cooling): A
Energy class (heating): Not published
Annual energy (cooling): Not published

Noise, size & features

Indoor noise

What is good

Wi-Fi and app control with 24h timer
3-in-1 cooling, fan and dehumidifier
Eco R290 refrigerant
Widely stocked and supported across Europe

What to watch

Single-hose, so efficiency drops in sealed sunny rooms
Louder, up to ~65 dB(A) sound power at full speed
Only A energy class

Installation & the rules that apply

This is a portable monobloc. The most regulation-light option by far. No F-gas certified installer is needed because you never break into the refrigerant circuit, no planning permission or permit is triggered since nothing is fixed to the building, and a landlord usually cannot refuse it as there are no permanent alterations. The main constraints are the tenancy or building rules on window-kit appearance and noise nuisance to neighbours.

Installation

Plug and play

Refrigerant

R290

GeneralRenters: get written landlord consent firstReviewed June 2026Often blocks install

Common questions about the Honeywell HF09 Wi-Fi

How loud is the Honeywell HF09 Wi-Fi?: 52 dB(A) indoors, about as loud as a refrigerator.
How energy-efficient is the Honeywell HF09 Wi-Fi?: Its efficiency rating is A.
What size room does the Honeywell HF09 Wi-Fi cool?: It is rated to cool a room 20–25 m² (2.6 kW · 9,000 BTU).
Do I need a professional to install the Honeywell HF09 Wi-Fi?: No. It is a portable monobloc you can fit yourself, no professional needed. No permission needed.

Is a portable even the right type?

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

Window vs portable Mini-split vs portable

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Dolceclima Compact (8 P)

Compact Italian-made single-hose monobloc with R290 refrigerant, EER 2.7 and energy class A. The Olimpia spec sheet and Geizhals both confirm 2.1 kW nominal cooling (8,000 BTU/h marketing label), not the A+ class previously recorded.

Cooling

2.1 kW