Shop by BTU
Shop air conditioners by BTU
BTU is the single most important spec when buying air conditioning \u2014 it tells you how much heat a unit can remove. Match the BTU to your room size and the unit will cool efficiently and quietly. Too small and it never catches up; too large and it short-cycles. Not sure? Use our BTU calculator first.
Under 7,000 BTU
Small bedrooms up to ~10 m²
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 days
In Stock
Mitsubishi Electric MLZ-KY20VG 1-Way Ceiling Cassette
6,800 BTU Up to 15m²
Energy A++Heats too (heat pump)
Drop-ship available£1,065.00inc VAT
Dispatched in 3-5 working days7,000–10,000 BTU
Bedrooms & home offices up to ~18 m²
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
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 days
In Stock
Sealey Heats too
Sealey Industrial Spot Cooler Air Conditioner 8,500Btu/hr (2.5kW)
8,500 BTU
Heats too (heat pump)
Drop-ship available£923.93inc VAT
Dispatched in 1–2 working days
In Stock
Baridi 5-in-1 Portable Air Conditioner, Dehumidifier & Air Cooler 7,000Btu/hr
7,000 BTU
Heats too (heat pump)
Drop-ship available£329.98inc VAT
Dispatched in 1–2 working days10,000–15,000 BTU
Living rooms & conservatories up to ~28 m²
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
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 days15,000–20,000 BTU
Large living rooms & open-plan up to ~40 m²
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 stock
In Stock
LG DualCool Pro A++ 18000 BTU Smart Wall Mounted Split Air Conditioner with Heat Pump
18,000 BTU
Energy A++Heats too (heat pump)
Drop-ship available£933.90inc VAT
Next working day dispatch — held in UK stockOver 20,000 BTU
Very large or open-plan spaces over 40 m²
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