Window Wall AC Systems in London
Looking for a simple, cost-effective way to cool a room without installing a full split or ducted system? Arcas Air Conditioning offers professional installation and servicing of window wall AC systems in London – a practical solution for apartments, offices, and smaller living spaces.
These units are compact, powerful, and require minimal installation work. Whether you're renting, renovating, or simply need a quick climate solution, we have the right air conditioning system to meet your needs.

Compact Cooling for Apartments & Offices – Professionally Installed by Arcas
What Is a Window Wall AC System?
A window wall air conditioner is a single-unit system designed to be mounted directly into a window frame or external wall. It houses the compressor, evaporator, and condenser in one compact casing, allowing it to function without needing ductwork or additional components.
Unlike split systems that require both indoor and outdoor units, a window wall AC system is self-contained — ideal for properties where installation access is limited or minimal modifications are preferred.
Key Benefits of Window Wall AC Units
- No External Unit Required – Everything contained in one compact box
- Fast Installation – Ideal for short-term or rental properties
- Low Cost – More affordable than split or ducted systems
- Heating & Cooling – Most units include reverse cycle operation
- Remote Control Access – Optional Wi-Fi/app functionality
- Simple Maintenance – Easy-to-clean filters and user controls
Brands & Models We Recommend
Ideal Applications
We install and maintain high-quality window wall air conditioning systems from brands like:
- Panasonic – Energy-efficient units with quiet operation
- Fujitsu – Compact models with powerful airflow and reverse cycle
- Mitsubishi Electric – Durable systems ideal for continuous use
We’ll help you choose the right capacity based on your room size and cooling requirements.
Our Window Wall AC Services in London
Arcas provides end-to-end support for window wall AC systems in London, including:
✅ System selection and sizing advice
✅ Wall cutout or window installation
✅ Weatherproofing and structural sealing
✅ Electrical connection and safety testing
✅ Maintenance services and filter cleaning
✅ Fault finding, repairs, and unit replacement
Whether it’s a retrofit or a new install, we make it seamless, secure, and compliant.
Why Choose Arcas?
- 15+ Years Experience – Trusted by homeowners and businesses across London
- Fully Qualified Engineers – All technicians are certified and insured
- 12-Month Workmanship Guarantee – For peace of mind
- Flexible Appointments – Including weekends and evenings
- Clear, Honest Pricing – No hidden charges or upselling
Whether you're fitting out a new flat or upgrading your office comfort, Arcas provides reliable, personalised service every time.

FAQs
Can I install a window wall AC system in a rental property?
Yes, with landlord permission. These systems are ideal for minimal-impact installs and easy to remove or upgrade later.
Do window wall units provide heating as well?
Many models come with reverse cycle functionality, meaning they offer both heating and cooling.
What’s the difference between a window and wall install?
Window installations fit into sliding or sash windows, while wall units require a cutout in an external wall. Both work similarly but depend on your layout.
Are these systems noisy?
Modern models are much quieter than older units and suitable for bedrooms or small offices.
Book a Local AC Technician Today
From installation to aftercare, Arcas Air Conditioning is your trusted partner for air conditioning in London. Whether you need help with a smart upgrade, an emergency fix, or a full commercial installation — we’re here to help.