Best Window Air Conditioners Deals Online in the UK (24 Deals Found)

Last Updated - 23/09/2026 Sort By:

Best Choice
KISSAIR

New
KISSAIR 5000 BTU Window Air Conditioner - Cools up to 150 m2 - Ultra Quiet Window Air Conditioner with Mechanical Contro
POWERFUL COOLING FOR YOUR SPACE - With a cooling output of 5,000 BTU, this window air conditioner effectively cools room

£317.45 £330.00
Classic America

New
Classic America WiFi Compatible, Alexa Ready, Energy Saving, Window Mounted Air Conditioners (8000 BTU 12 CEER 120 VAC),
Intelligent control with the Alexa and TUYA app - Control your air conditioning from anywhere with the Tuya Smart App on

£448.50
New
Portable Air Conditioner 12000-12999 BTU Single Hose Window Kit Remote White
Portable Air Conditioner 12000-12999 BTU Single Hose Window Kit Remote White

£200.00
Adoolla

New
Adoolla Window Air Conditioner 6,000 Btus, Turbo Fast Cooling Up to 250 Sq.Ft. Flexible Window Opening(T Design), Window
Fast & Powerful Cooling - 6000 BTU window air conditioner is a powerful indoor air conditioner unit packed with multiple

£371.70
New
Ductless Portable AC - No Window Needed, 3-In-1 Wall Mount Air Conditioner with
Ductless Portable AC - No Window Needed, 3-In-1 Wall Mount Air Conditioner with

£71.41
DREO

New
DREO 12000 BTU Portable Air Conditioner, 3-in-1 Cool/Fan/Dry Quiet AC Unit for Bedroom/Office, Smart App/Voice/Remote Co
𝗨𝗹𝘁𝗿𝗮 𝗣𝗼𝘄𝗲𝗿𝗳𝘂𝗹 𝗜𝗰𝗲𝗖𝗼𝗼𝗹 𝗦𝘆𝘀𝘁𝗲𝗺: This 12000 BTU (3.5kW) portable air conditioner paired with its

£599.99
Best Value
Temprium

New
Air Conditioning Unit - 12000 BTU Portable Air Conditioner, 4-in-1 Modes & Smart App/Remote Control AC, Digital Display,
【12000 BTU Powerful & Efficient Cooling】 This 12000 BTU portable air conditioner delivers powerful cooling for any ac un

£429.99
New
High Flow Air Con Window Vent Adapter Connector AC 150mm 5.9" Air Conditioning
Portable Air Conditioner Window Vent Adapter – 150mm (5.9").

£32.99
Carsolt

Used
Carsolt Portable Air Conditioner 9000 BTU
POWERFUL & QUIET 9000 BTU COOLING FOR SMALL ROOMS - Experience rapid cooling for spaces up to 25㎡ (approx. 269 sq ft),

£199.99
New
Ultra Wide Air Con Window Vent Adapter Portable AC Connector for 150mm hose
Ultra Wide Portable Air Conditioner Window Vent Adapter – 150mm (5.9").

£34.99
40% Off
Belaco

New
Belaco 9000 BTU Air Conditioning Unit – Smart WiFi Connectivity
Smart WiFi with Voice Control: Control your air conditioner from anywhere using the Tuya Smart App, or enjoy hands-free

£599.99 £999.99
Windmill

New
Windmill 8,000 BTU Quiet Window Air Conditioner, Cools up to 250-350 sq ft
An Ultra Quiet Air Conditioner For A More Comfortable Home: With curved edges, clean lines, and an auto-dimming LED disp

£804.69
New
High Flow Air Con Casement Window Adapter Connector AC 150mm 5.9" Side Hinged
Portable Air Conditioner Window Vent Adapter – 150mm (5.9").

£32.99
DOMANKI

New
14000 BTU Portable Air Conditioners for Room Cooling up to 700 Sq. Ft, 3-IN-1 Quiet Portable AC Unit with Dehumidifier F
Efficient & Powerful Cooling - This portable air conditioner has a cooling capacity of 14,000 BTU (ASHRAE) / 10,000 BTU

£147.75
New
Portable Air Con 6 Inch / 150mm Hose Horizontal And Velux Window Custom Adapter
I don't have a Velux window at my house so that picture was taken at my parents so wasn't able to get a picture with the

£21.50
25% Off
Derwit

New
air conditioner window seal for Most Casement Windows AC 4M 157.48inch
Designed for portable air conditioners, this window seal kit helps prevent hot air from flowing back into the room, impr

£17.99 £23.99
New
High Flow Air Con Window Vent Adapter Connector AC 155mm 6"
This custom vent adaptor provides asecure and efficient connection between your portable air conditioner exhaust hose an

£32.99
New
Portable Air Conditioner Window Vent Kit Adjustable - Sliding/Sash window
Came with my portable AC unit but no good for my hinged windows.

£19.53
New
BW 102 Portable Air Cooler Fan, 3-in-1 Evaporative Cooling, 6L Tank & Ice Packs
The BW 102 Portable Air Cooler Fan is a versatile 3-in-1 evaporative cooling unit suitable for indoor use in homes, offi

£64.95
New
Portable Air Conditioner Acrylic Window Seal Clear or Frosted Custom Orders Done
Available in 3mm Clear, 4mm Clear or 3mm Frosted (privacy) Sheet.

£50.00
New
Ductless Portable AC - No Window Needed, 3-In-1 Wall Mount Air Conditioner with
AUTOMATIC SAFETY PROTECTION: Equipped with an overheat prevention system, the portable unit shuts off automatically when

£89.99
New
Portable Air Con Window Vent Adapter Connector AC 150mm - 6" - 3D Printed - UK
❄️ Portable Air Conditioner Window Adapter | 150mm (6") Exhaust Hose Connector | UK 3D Printed.

£30.85
New
High Flow Air Con Window Vent Adapter Connector AC 150mm - 6" - 3D Printed
❄️ Portable Air Conditioner Window Adapter | 150mm (6") Exhaust Hose Connector | UK 3D Printed.

£30.85
New
Air Conditioning 150mm Window Vent Adapter Portable AC Connector Exhaust
Designed to create a tight, seamless seal between your air conditioner's exhaust hose and your window slider kit, this a

£26.70

24 Window Air Conditioners deals are available from: Amazon, eBay stores, starting from £17.99.
The biggest discount we found is 40% on Belaco 9000 BTU Air Conditioning Unit – Smart WiFi Connectivity at Amazon.
The lowest price we found is £17.99 while the highest is £804.69.
Prices for the best Window Air Conditioners deals average at £194.91.
Last updated on September 23, 2026.
We scanned these quality online stores and more to deliver you with the best offers online available for Window Air Conditioners.