The cost of installing a wall-mounted air conditioning (split-system) unit in the UK can vary depending on several factors, including the size of the unit, the complexity of the installation, and the company you choose. Here’s a breakdown of typical costs:

1. Cost of the Unit:

• Small Wall-Mounted AC Unit (up to 3.5 kW): £500 to £1,200
  • Suitable for small to medium-sized rooms, like bedrooms or small living rooms.
• Medium Wall-Mounted AC Unit (3.5 kW to 7 kW): £1,200 to £2,000
  • Ideal for larger spaces such as open-plan living areas or offices.
• Large Wall-Mounted AC Unit (7 kW+): £2,000 to £3,500+
  • Used for larger commercial spaces or big homes.

2. Installation Costs:

• Simple Installation: £300 to £1900
  • This is for straightforward installations where the outdoor unit can be easily mounted, and there are minimal wiring and pipework requirements.
• Complex Installation: £1600 to £5,000+
  • If the installation involves more extensive pipework, electrical work, or complex mounting (e.g., multi-story buildings or hard-to-reach areas), costs can increase.

3. Total Installation Cost:

• For a standard installation of a small  AC unit, you can expect the total cost (unit + installation) to range from £800 to £2,000.
• For larger units or more complicated installations, the total cost could rise to £2,000 to £4,500+.

Additional Costs to Consider:

• Electrical Work: If additional electrical work is required, such as installing a dedicated circuit, this could add another £100 to £300.
• Mounting Brackets or Pads: Outdoor units may require special mounting brackets or pads, which can add £50 to £150 to the overall cost.
• Smart Controls: If you want to integrate your AC unit with smart home systems (like Alexa or Google Home), this could involve extra costs for smart thermostats or control systems.

Summary:

• Total Cost for Unit + Installation: Typically between £800 and £2,500 for most residential installations.
• Complex Installations or Large Units: Costs can exceed £3,000 to £4,500, depending on the unit size and installation complexity.