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Comparison

Guide: the 3 best energy efficient portable air conditioners (April 2026)

#1
MeacoCool MC Series 8,000R Portable Air Conditioner - Powerful Portable Air Conditioner, Energy Efficient with Two Window Venting Kits included 8000

Meaco

MeacoCool MC Series 8000R Portable AC

★★★★★ ★★★★★ 8.0/10
+ Cools small to medium rooms effectively with 8000 BTU power
+ Includes both rigid and flexible window kits, so no extra venting kit needed for most windows
#2
MOBIS 9 UK portable air conditioner, 9000 BTU, A energy class, white - Manufactured to be installed in UK (3381529)

Ariston

MOBIS 9 9000 BTU Portable AC (UK)

★★★★★ ★★★★★ 8.0/10
#3
MOBIS 8 UK portable air conditioner, 8000 BTU, A energy class, white - Manufactured to be installed in UK

Ariston

MOBIS 8,000 BTU Portable Air Conditioner (UK)

★★★★★ ★★★★★ 7.9/10
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Comparison

4 best quiet portable air conditioners: our comparison (April 2026)

#1
5,000 BTU Window Air Conditioner with Remote Control, Cools Up to 150 Sq - Ft., Quiet Operation, Eco Mode, 3 Fan Speeds, Auto Restart, White 5,000 BTU Electronic Controls

Frigidaire

5,000 BTU Window Air Conditioner

★★★★★ ★★★★★ 8.3/10
+ Cools small rooms (up to ~150 sq ft) reliably and fairly quickly
+ Light and compact, easier to install than bigger window units
#2
5,000 BTU Window-Mounted Air Conditioner, Cools Up to 150 Sq - Ft., Quiet Operation, Effortless Temperature Control, 2 Fan Speeds, Auto Restart, White 5,000 BTU Mechanical Controls

Frigidaire

5,000 BTU Window Air Conditioner

★★★★★ ★★★★★ 8.3/10
#3
8000 Btu Portable Air Conditioners, 3 in 1 Portable AC with Cool, Dry, Fan Modes, Quiet Air Conditioners with 24H Timer & Sleep Modes, with Remote, for Bedroom, Apartments up to 350 Sq.Ft 8,000 BTUs, 2025

EUHOMY

8000 Btu Portable Air Conditioners, 3 in 1 Portable AC with Cool, Dry, Fan Modes, Quiet Air Conditioners with 24H Timer & Sleep Modes, with Remote, for Bedroom, Apartments up to 350 Sq.Ft 8,000 BTUs, 2025

★★★★★ ★★★★★ 8.2/10
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Our latest product reviews

4-in-1 Portable Air Conditioner 9000 BTU - Smart Home WiFi, 24 hr Timer, Window Kit, Powerful Air Conditioning, Class A Energy Efficient AC Unit for Home & Office - WHICH? BEST BUY AC AWARD 9,000 BTU + Smart App

Pro Breeze

4-in-1 Portable Air Conditioner 9000 BTU - Smart Home WiFi,...

Solid cooling with a few loud compromises

8.1/10 ★★★★★ ★★★★★
Value for money ★★★★★ ★★★★★
Design ★★★★★ ★★★★★
Battery ★★★★★ ★★★★★
Comfort ★★★★★ ★★★★★
+ Genuinely strong cooling for medium rooms – notice...
- Quite noisy even on low fan – more like a loud fri...
Read full review
4-in-1 Portable Air Conditioner 7000 BTU with Remote Control, 24 Hour Timer & Dual Window Venting Kit Included - Powerful Air Conditioning Unit with Class A Energy Efficiency Rating 7,000 BTU

Pro Breeze

4-in-1 Portable Air Conditioner 7000 BTU with Remote Control...

Compact unit that cools well but shouts about it

8.1/10 ★★★★★ ★★★★★
Value for money ★★★★★ ★★★★★
Design ★★★★★ ★★★★★
Durability ★★★★★ ★★★★★
Performance ★★★★★ ★★★★★
+ Cools small to medium rooms effectively, noticeabl...
- Quite loud in all modes, not ideal for sleeping ne...
Read full review
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