Shop by Room Size
Shop air conditioners by room size
Room size is the simplest way to narrow your search. Each section below shows the units sized for that room category. For an exact match, run the numbers through our BTU calculator.
Small rooms (up to 15 m²)
Bedrooms, box rooms and small home offices. A 7,000–9,000 BTU unit cools these comfortably and quietly.
In Stock
TCL Amazon Alexa · Google Home · Apple HomeKit
TCL 8,000 BTU Smart Inverter Window Air Conditioner
8,000 BTU Up to 32m²
Energy A+
Drop-ship available£420.00inc VAT
Dispatched in 2-3 working days
In Stock
TCL 5,000 BTU Mechanical Window Air Conditioner
5,000 BTU Up to 14m²
Energy A
Drop-ship available£250.00inc VAT
Dispatched in 2-3 working days
In Stock
Midea Amazon Alexa · Google Home
Midea 6,000 BTU U-Shaped Smart Window AC – Black
6,000 BTU Up to 23m²
Energy A++
Drop-ship available£420.00inc VAT
Dispatched in 2-3 working days
In Stock
Sealey Heats too
Sealey Industrial Spot Cooler Air Conditioner 6,800Btu/hr (2kW)
6,800 BTU
Heats too (heat pump)
Drop-ship available£791.93inc VAT
Dispatched in 1–2 working daysMedium rooms (15–25 m²)
Living rooms, main bedrooms and medium home offices. Around 10,000–12,000 BTU is the sweet spot.
In Stock
Save £32.40
Haier 4.0kW Multi-Split Outdoor AC Unit (R32) 2-Port
13,650 BTU Up to 40m²
Energy A++Heats too (heat pump)
Drop-ship available£1,587.60inc VAT£1,620.00
Dispatched in 2-3 working days
In Stock
TCL Amazon Alexa · Google Home · Apple HomeKit
TCL 12,000 BTU Smart Inverter Window Air Conditioner
12,000 BTU Up to 50m²
Energy A+
Drop-ship available£550.00inc VAT
Dispatched in 2-3 working days
In Stock
Hisense Amazon Alexa · Google Home
Hisense 12,000 BTU UltraSlim Smart Inverter Window AC
12,000 BTU Up to 50m²
Energy A++
Drop-ship available£585.00inc VAT
Dispatched in 2-3 working days
In Stock
Midea Amazon Alexa · Google Home
Midea 10,000 BTU SmartCool Window Air Conditioner
10,000 BTU Up to 42m²
Energy A+
Drop-ship available£505.00inc VAT
Dispatched in 2-3 working daysLarge rooms (25–40 m²)
Open-plan living rooms and conservatories. Expect 14,000–20,000 BTU to handle the extra volume.
In Stock
Hisense Amazon Alexa · Google Home
Hisense 14,000 BTU Smart Inverter Window Air Conditioner
14,000 BTU Up to 65m²
Energy A
Drop-ship available£705.00inc VAT
Dispatched in 2-3 working days
In Stock
TCL 18000 BTU Smart A++ Wall Mounted Split Air Conditioner with Heat Pump
18,000 BTU
Energy A++Heats too (heat pump)
Drop-ship available£659.97inc VAT
Next working day dispatch — held in UK stock
In Stock
Toshiba Heats too
Toshiba RAS16 16000 BTU A++ Wall Mounted Split Air Conditioner with Heat Pump
16,000 BTU
Energy A++Heats too (heat pump)
Drop-ship available£879.97inc VAT
Next working day dispatch — held in UK stock
In Stock
Midea Comfee 18000 BTU Smart A++ Wall Mounted Split Air Conditioner with Heat Pump
18,000 BTU
Energy A++Heats too (heat pump)
Drop-ship available£548.90inc VAT
Next working day dispatch — held in UK stockVery large / open-plan (40 m²+)
Large open-plan spaces, double-height rooms and commercial rooms. 21,000+ BTU or a multi-split system.
In Stock
Save £49.92
LG 7.9kW Multi-Split 4-Port Outdoor AC Unit (R32)
27,000 BTU Up to 80m² total
Energy A++Heats too (heat pump)
Drop-ship available£2,446.08inc VAT£2,496.00
Dispatched in 2-3 working days-16759-p.jpg?v=3F8042AF-DC19-4FED-9CFF-BD3A045362DE)
In Stock
Save £54.71
LG 8.8kW Multi-Split 5-Port Outdoor AC Unit (R32)
30,000 BTU Up to 100m² total
Energy A++Heats too (heat pump)
Drop-ship available£2,661.29inc VAT£2,716.00
Dispatched in 2-3 working days
In Stock
Haier 12.5kW Multi-Split Outdoor AC Unit (R32) 5-Port
42,650 BTU Up to 120m²
Energy A++Heats too (heat pump)
Drop-ship available£5,040.00inc VAT
Dispatched in 3-5 working days
In Stock
electriQ iQool Multi-Split 2 x 12000 BTU Smart Wall Mounted Air Conditioner with Heat Pump - Black
24,000 BTU
Heats too (heat pump)
Drop-ship available£1,099.97inc VAT
Next working day dispatch — held in UK stock