Advertising Disclosure Which Air Conditioner Brands Are Energy Efficient Comparison - May 2026
6 Best Which Air Conditioner Brands Are Energy Efficient In the UK
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant's customer service levels, popularity trends, and more. The rankings reflect our opinion and should be a good starting point for shopping. As an Amazon Associate we may earn from qualifying purchases. We may receive a commission from purchases made through links on our site, which will help us continue to provide you with value.
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| 1 Best Choice  9.8Exceptional | 2  9.7Exceptional | 3  9.6Exceptional | 4 Best Value  9.4Excellent | 5  9.3Excellent | 6  9.2Excellent |
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ModelPro Breeze 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 | Model Pro Breeze 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 | Model De'Longhi Pinguino Compact PACES72 Classic Compact Portable 8,300 BTU Air Conditioner, 3 in 1 Air Conditioning Unit, Rooms up to 60m³, A Energy Efficiency, Window Kit Included, Energy Class A, White | Model Air Conditioning Unit - Portable Air Conditioner 9000 BTU, 4-in-1 Energy Efficient Cooling & Dehumidifier, Quiet Operation, Digital Display, Window Kit, 24-Hour Timer, Covers Up to 215 sq.ft (20㎡) | Model HOMCOM 8000 BTU 4-In-1 Portable Air Conditioner Unit Cooling Dehumidifying Ventilating for Room up to 27m², with Fan, Remote, 24H Timer, Window Mount Kit, R290, A Energy Efficiency | Model 9000 BTU Portable Air Conditioner, 3-in-1 AC Unit with Cooling, Dehumidifier, Fan, 2 Speeds, 24H Timer, Sleep Mode, Quiet, Remote, Window Kit for Home & Office Up to 300sq.ft [Energy Class a] |
BrandPro Breeze | Brand Pro Breeze | Brand De'Longhi | Brand EUHOMY | Brand HOMCOM | Brand Lidzopas |
Reviews | Reviews | Reviews | Reviews  | Reviews | Reviews |
Tech Specs | |||||
Energy Efficiency ClassA | Energy Efficiency Class A | Energy Efficiency Class A | Energy Efficiency Class - | Energy Efficiency Class - | Energy Efficiency Class - |
Timer24 hour on/off | Timer 24 hour | Timer - | Timer 24-hour | Timer - | Timer 24-hour |
Refrigerant TypeR290 | Refrigerant Type R290 | Refrigerant Type R290 | Refrigerant Type - | Refrigerant Type - | Refrigerant Type R290 Eco-Friendly |
Cooling Capacity7000 BTU | Cooling Capacity 9000 BTU | Cooling Capacity 8, 300 BTU | Cooling Capacity - | Cooling Capacity - | Cooling Capacity 9000 BTU |
Weight54.01325419 pounds | Weight 54.01325419 pounds | Weight 56.21787681 pounds | Weight - | Weight - | Weight 55.8430909646 pounds |
Available On | Available On | Available On | Available On | Available On | Available On |
Our Top 3 Picks
Here are the top 3 recommended products with more information to help you find the right product for you
9.8
1Pro BreezePro Breeze 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
Why we love it
Compact design fits various spaces
Remote and digital control for convenience
Energy efficient operation saves on bills
Main highlights- WINDOW KITS INCLUDED: This Air Conditioner includes two easy-to-install window venting kits, allowing the AC unit to fit either slide or hinged windows using the step by step instructions provided. Its space-saving design also ensures minimal intrusion.
- POWERFUL AIR CONDITIONER : This 7000 BTU air conditioner provides strong and effective cooling down to 15°C in small, medium and large homes, living rooms, bedrooms and offices.
- ENERGY EFFICIENT AIR CONDITIONER: This A/C unit boasts a Class A Energy Efficiency rating to ensure that keeping you cool in the summer heat is cost effective. This air conditioner utilises an R290 refrigerant which is up to 690 times more eco-friendly than traditional air conditioning gasses. The advanced sleep mode keeps you cool whilst reducing overnight energy consumption.
- DIGITAL DISPLAY & REMOTE CONTROL: The air conditioners easy-to-use digital LED display and wireless remote control allows you to have full control of all operating modes including auto, cooling and sleep as well the built-in 24 hour on/off timer and adjustable thermostat temperature control (in °C & °F).
- 4-IN-1 FEATURES: This portable air conditioning unit features 4 multi-purpose operating modes including auto, air cooling, dehumidifying, fan only and energy saving sleep modes.
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9.7
2Pro Breeze
Pro Breeze 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
Why we love it
Smart WiFi app and voice control
Multi-function cooling with 4 modes
Energy efficient operation
Main highlights- WINNER OF THE WHICH? BEST BUY AWARD: Awarded the Which? Best Buy for Air Conditioners (December 2025) recognising top-tier performance, reliability, and value. Independently rated one of the best air conditioners on the market.
- WINDOW KITS INCLUDED: We have included two easy-to-install air conditioner window venting kits with our AC unit to fit either slide or hinged windows using the step by step instructions provided. Its space-saving design also ensures minimal intrusion.
- SMART HOME TECHNOLOGY WITH WI-FI: Connect your smartphone to the AC unit and control the air conditioners temperature, 24 hour timer and various air con functions through the app or voice command. Compatible with Amazon Alexa and Google Home for iPhone and Android.
- POWERFUL COOLING This portable air conditioner features 9000 BTU of cooling capacity, allowing for strong and effective cooling down to 16°C in medium to large homes, living rooms, bedrooms and offices
- ENERGY EFFICIENT AIR CONDITIONER: This A/C unit boasts a Class A Energy Efficiency rating to ensure that keeping cool in the sweltering summer heat is cost effective. It also utilises an R290 refrigerant, up to 690 times more eco-friendly than traditional air conditioning gasses.
- 4-IN-1 FEATURES WITH DIGITAL DISPLAY: This portable air conditioning unit features 4 multi-purpose operating modes including air cooling, dehumidifying, fan only and sleep modes all of which can be controlled via the air conditioner smart app, digital display or remote control.
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9.6
3De'Longhi
De'Longhi Pinguino Compact PACES72 Classic Compact Portable 8,300 BTU Air Conditioner, 3 in 1 Air Conditioning Unit, Rooms up to 60m³, A Energy Efficiency, Window Kit Included, Energy Class A, White
Why we love it
Compact and easy to move
Highly energy efficient
Quieter operation
Main highlights- WINDOW KIT INCLUDED - Window kit is included with 1.5m hose length, for easy installation
- WINDOW KIT & CASTOR WHEELS - Window kit is included with 1.2m hose length, for easy installation, Easily move your air conditioner to the room of your choice with ease thanks to the integrated handles and castor wheels for easy portability
- QUIETER COOLING - Pinguino Compact has a 50% noise reduction from max to min speed
- ENERGY EFFICIENT - Class A Energy Efficiency rating, Refrigerant gas R290, which is up to 696 times more environmentally friendly than traditional gases (696 times compared to the impact of Global Warming of R410 - F-Gas Reg. 517/2014)
- EASY TO USE - Manage all functions including temperature, fan speed, timer and cooling function, Control with remote control, or use touch controls on the unit, Integrated handles and castors wheels make for easy transportation
- COMPACT COOLING - Pinguino Compact is a 8,300 BTU powerful cooling solution for living rooms, bedrooms and offices up to 60m³
- 3 IN 1 FUNCTIONALITY - Enjoy ideal comfort thanks to this multifunctional 3-in-1 unit with 2 speed settings, Separate dehumidifying function (21l/ 24 hours) for especially wet seasons or humid rooms and separate fan function to simply circulate air
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Features
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Value for money
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Value for money
topchoice.co.uk compares product attributes to price, examines tech specs, ratings and reviews, and more.When compared to other criteria, does the pricing seem reasonable? In order to provide genuine value for money, our team must answer that question with advanced calculations.
