Split System Air Conditioners
A split system is the UK's most popular fixed air conditioner: a slim wall-mounted indoor unit paired with an outdoor condenser. Because the compressor stays outside, splits run quietly and efficiently — most modern inverter splits double as heat pumps, so one unit cools in summer and heats in winter.
Every split system sold by Stockool ships free across the UK mainland and, because UK F-gas rules require certified installation, we'll match you with a local HVAC engineer to fit it — no hunting for a tradesperson yourself.
Why choose a split system air conditioner
- Inverter compressor — quiet, efficient and steady temperature control
- Reverse-cycle heat pump — efficient winter heating as well as summer cooling
- Wi-Fi & app control on smart-ready models (Alexa, Google Home, SmartThings)
- Professional F-gas installation matched for free through Stockool
All split system air conditioners
View all 60 units
Samsung WindFree Elite S2 5.0kW Wall Split System
Samsung WindFree Avant S2 3.5kW Wall Split System
Samsung Luzon S2 2.5kW Wall Split System
Samsung WindFree Comfort S2 7.0kW Wall Split System
Toshiba Daiseikai 9 3.5kW Inverter Split System
Toshiba Daiseikai 10 2.5kW High-Wall Split System
Toshiba Digital Inverter 2.5kW 4-Way Ceiling Cassette
Toshiba Super Daiseikai 10 Wood Finish 3.5kW Split System
Hisense Fresh Master 3.5kW Inverter Split
Hisense X4 Series 5.4kW Wall Split System
Hisense Energy Pro 3.5kW Wall Split System
LG Standard Plus 18000 BTU Wall Mounted Split System
Split System Air Conditioners — frequently asked
Do split system air conditioners need professional installation?
Yes. UK F-gas regulations require a certified engineer to handle the refrigerant lines. Stockool matches every split-system buyer with a local, qualified installer so you don't have to source one separately.
Can a split system heat a room in winter?
Most inverter split systems are reverse-cycle heat pumps, so they provide efficient heating as well as cooling. Heat-pump heating typically costs far less to run than an electric space heater.
How loud is a split system indoors?
Indoor units are very quiet — typically 19 to 30 dB on low, roughly the level of a soft whisper. The noisier compressor is in the outdoor unit, mounted away from the living space.