Installation of Two Wall Mounted AC Units in Semi-Detached Home in London
I’m looking to install two air conditioning units that I will be buying. One is for the living room and the other for a bedroom. Both units will require the vent to go through another room to reach the back of the house. The rooms are roughly 6m by 4m. Please call to arrange an appointment.
Expert Advice on Installing Multiple Wall-Mounted Air Conditioning Units
Installing two wall-mounted air conditioning units in a semi-detached home, such as James’ property in London, involves careful planning to ensure efficient operation and minimal disruption. Routing vents through another room to the rear of the property adds complexity but is manageable with professional expertise. Below, we outline the key considerations and steps for this project.
Requirements for Living Room and Bedroom Installations
Both rooms, measuring approximately 6m by 4m, require units with sufficient cooling capacity. A unit with a capacity of 2.5 to 3.5 kW is suitable for each room, depending on insulation and the number of occupants. Wall-mounted units are ideal for such spaces, offering efficient cooling while saving floor space.
Key Considerations for Installation
Routing vents through another room to reach the rear of the house presents several considerations:
- Pipe Routing: Refrigerant pipes and electrical cables must be carefully routed through intermediate rooms to the outdoor condenser unit.
- Minimising Intrusion: Pipework will be concealed as much as possible using trunking or by routing through walls or ceilings.
- Efficient Placement: The indoor units should be positioned for optimal airflow and minimal impact on the room’s aesthetics.
- Outdoor Unit Placement: The outdoor condenser unit will be installed at the back of the property for easy access and quiet operation.
Installation Process
The installation of two wall-mounted units involves the following steps:
- Site Assessment: The installer will assess the property to determine the best locations for the indoor units, pipe routes, and outdoor unit placement.
- Mounting Indoor Units: The units will be securely mounted on walls in the living room and bedroom, ensuring proper alignment for efficient operation.
- Routing Pipework: Pipes and cables will be run through the intermediate room, using trunking or concealed routes to minimise visual impact.
- Installing Outdoor Unit: The condenser unit will be placed at the rear of the property, secured on a wall bracket or ground mount as required.
- Connecting Components: Refrigerant lines, power cables, and drainpipes will be connected between the indoor and outdoor units.
- System Testing: The system will be charged with refrigerant, tested for leaks, and powered on to verify proper operation.
Estimated Costs
The cost of installation for two wall-mounted units in London depends on the complexity of the pipe routing and the length of the runs. Typical costs include:
- Labour: £800–£1,500 for installing two units, including routing pipes through another room.
- Materials: £200–£400 for trunking, brackets, insulation, and other required materials.
A detailed quote will be provided after the site assessment, ensuring transparency in costs and scope.
Benefits of Professional Installation
Opting for professional installation ensures:
- Safe and Compliant Work: Installations adhere to industry standards and safety regulations.
- Efficient Operation: Proper placement and setup maximise cooling performance and energy efficiency.
- Neat and Clean Finish: Pipe routing is concealed or tidied for minimal visual intrusion.
Preparing for Installation
To prepare for the installation, ensure the areas where the indoor units will be mounted are accessible and free of obstructions. If possible, clear the pathway through the intermediate room for pipe routing. The installer will handle any necessary drilling or structural modifications.
Local Expertise in London
Our team has extensive experience installing multi-room air conditioning systems in London, including areas like Brixton, Clapham, and Streatham. We specialise in tailored solutions that meet the unique challenges of urban properties.
For more information on air conditioning installation in London, contact our experts today. We’ll ensure a professional and efficient setup for your new AC units.

