Electrical Works and System Integration
We didn’t stop at just the mechanical side. Our engineers also handled all electrical requirements:
- Installed a new TPN Sub Main SWA cable and TPN distribution board
- Added final circuits for the AHU, condenser, dampers, and ancillaries
- Carried out electrical testing to BS7671:2018 standards
- Supplied a NICEIC certificate for all completed electrical work
- Our fully integrated solution included all testing, commissioning, and compliance documentation

Refrigeration and Condensate Management
We used soft 15m refrigeration copper coils to reduce hot works. This decision improved on-site safety and efficiency. Our engineers:
- Pressure tested the system with OFN to detect leaks
- Installed a full R32 refrigerant trim charge, per Daikin specifications
- Connected a new condensate drain facility to the local foul drain
All refrigeration work complied with industry best practice and safety standards.
Commissioning and Final Handover
After completing mechanical and electrical works, we arranged for Daikin engineers to commission the system. The new AHU now supports efficient airflow at London City Airport’s main entrance.
Passengers entering the building now benefit from clean, comfortable air managed by a reliable system. The project showcases our skill in delivering turnkey AHU services in complex environments.
Results of the AHU Installation at London City Airport
- Significantly improved indoor air quality for arriving passengers
- Reliable temperature and airflow management at the airport’s main entrance
- Seamless integration of the new system into an active airport environment
- Full compliance with fire safety, electrical, and mechanical standards
Air Handling Unit Services You Can Trust
Whether you need air handling unit repair, full AHU replacement, or regular AHU maintenance, IDWe Ltd can help. Our expert team works with commercial and industrial buildings across London and the South East.
At London City Airport, our air handling unit installation delivered both comfort and compliance. We planned the project to avoid operational disruption. That’s why clients trust us for reliable, professional air handling unit services.
Why Air Handling Units Are Critical in Commercial Spaces
An AHU plays a vital role in air quality and ventilation. It filters, heats, cools, and circulates air throughout a building. In high-traffic areas like airports, AHUs must perform consistently.
If your AHU breaks down, your building suffers. Occupants feel discomfort, and energy bills rise. That’s why regular AHU servicing is essential. IDWe Ltd offers AHU repairs, AHU maintenance, and full AHU replacement as needed.
Benefits of Replacing an Air Handling Unit
Sometimes, maintenance alone isn’t enough. Ageing units can’t keep up with modern energy standards or usage demands. That’s when AHU replacement becomes essential.
Here are the key benefits of replacing an outdated air handling unit:
Improved Energy Efficiency
Modern AHUs operate with advanced motor controls, efficient fans, and updated refrigerants. This reduces energy consumption and cuts utility bills.
Better Air Quality
New units include improved filtration systems. These remove more dust, allergens, and pollutants – creating a healthier indoor environment for staff and visitors.
Enhanced System Control
Up-to-date AHUs offer smart controls, digital thermostats, and integration with building management systems. This improves control over temperature and airflow.
Reduced Maintenance Costs
Old systems often need regular repairs. A new unit reduces breakdowns and cuts maintenance costs over time.
Compliance With Regulations
New AHUs comply with the latest energy and safety regulations. You avoid potential fines and support your sustainability goals.
Quiet, Comfortable Performance
Newer systems run more quietly. This improves comfort levels, especially in reception areas, meeting rooms, and public spaces.
Extended Warranty and Manufacturer Support
Installing a new unit gives you peace of mind. You benefit from warranties and aftercare services from manufacturers like Daikin.
Ready to Upgrade Your AHU?
If your system shows signs of ageing or inefficiency, it’s time to consider an AHU replacement. At IDWe Ltd, we deliver complete air handling unit services – from inspection to full installation.
Let’s discuss your site needs and plan the best way to improve your air quality, efficiency, and compliance.
IDWe Ltd specialises in AHU services, offering air handling unit repairs, maintenance, and complete replacements. We work across commercial and industrial environments.
This London City Airport project highlights our ability to manage complex AHU installations with minimal disruption. Our experienced engineers understand how to integrate new systems into busy environments like airports.
Need expert AHU services?
Contact IDWe Ltd today on 020 8302 7644 to book your air handling unit installation, repair, or replacement.
We have over 35 years’ experience offering quality services across London and the South East.
Find out more about our AHU Mechanical Services
Discover all our services
To get a quote, please call 020 8302 7644 or email: info@idwe.co.uk
Would you like to keep up to date with IDWe Ltd? Follow us on social media: Facebook, X & LinkedIn.

