Wall-mounted Air Conditioning for New Extension in Birmingham B31
I’m looking to install air conditioning in a new extension at my detached property on Senneleys Park Road, Birmingham (B31). The extension is 7.5m by 5m, and I’d like a wall-mounted unit to keep the space cool and comfortable. Please advise on the best options for the size of the room. Call to arrange a consultation.
Expert Advice on Air Conditioning for Large Extensions
Adding air conditioning to a new extension, such as Satnam’s in Birmingham, is an excellent way to ensure comfort year-round. With a room size of 7.5m x 5m (37.5m²), it’s important to select a unit with the right cooling capacity and features to suit the space and usage requirements.
Calculating Cooling Capacity
For a space measuring 37.5m², a unit with a cooling capacity of approximately 12,000 to 15,000 BTU (British Thermal Units) is ideal. This estimate accounts for factors such as room size, ceiling height, insulation, and the number of windows. Larger windows or south-facing orientations may require additional capacity to counteract heat gain from sunlight.
Recommended Wall-mounted Air Conditioning Units
Top manufacturers like Mitsubishi Electric, Daikin, and LG offer reliable wall-mounted systems suitable for larger spaces. Popular models include:
- Daikin Stylish Series: Known for its sleek design, high efficiency, and quiet operation, this model includes smart controls for added convenience.
- Mitsubishi Electric MSZ-LN Series: Provides excellent energy efficiency with a modern design and a range of colour options to complement your interior.
- LG DualCool: Offers energy-saving features and whisper-quiet operation, making it ideal for family spaces like living rooms and extensions.
Installation Process
The wall-mounted unit will typically be installed at a central location in the extension for optimal airflow. The outdoor condenser unit should be placed in a well-ventilated area, ideally away from windows or high-traffic zones, to minimise noise. Professional installers will also ensure proper drainage and secure connections for long-term reliability.
Cost and Timeline
The cost for a single wall-mounted air conditioning system suitable for this room size ranges from £1,800 to £2,800, including supply and installation. The project can generally be completed within a day, depending on the property’s layout and installation complexity.
Benefits and Maintenance
Modern air conditioning units offer both cooling and heating capabilities, making them a versatile choice for all seasons. Regular maintenance, such as cleaning filters and inspecting components, ensures peak efficiency and extends the system’s lifespan. Many units come with warranties of five to ten years, providing long-term peace of mind.
Additional Services and Nearby Areas
If you’re looking to enhance energy efficiency further, consider upgrading insulation or window treatments in the extension. We also offer air conditioning installation services in surrounding areas, including Selly Oak, Northfield, and Rednal, ensuring professional support across Birmingham and the West Midlands.
For more details on air conditioning installation for extensions in Birmingham or to explore our wall-mounted AC systems in West Midlands, contact us today to schedule a consultation or visit our website for more information.

