Extend The Life of Your Existing AHUs Without Full Replacement
Modernise ageing Air Handling Units with intelligent retrofit solutions designed to improve energy efficiency, reliability, visibility, and control while avoiding the cost and disruption of replacing entire systems.
Extend The Life of Your Existing AHUs Without Full Replacement
Modernise ageing Air Handling Units with intelligent retrofit solutions designed to improve energy efficiency, reliability, visibility, and control while avoiding the cost and disruption of replacing entire systems.
AHU RETROFIT & CONTROL UPGRADES
Why you should retrofit your existing AHU?
Retrofitting existing HVAC infrastructure has become one of the most effective strategies for improving building performance, reducing energy consumption, and supporting sustainability goals without major capital expenditure.
Industry research highlights that modern HVAC control upgrades can significantly improve operational efficiency, increase visibility into energy usage, and extend system life expectancy.
✅ Reduce energy consumption and improve system efficiency.
✅ Improve BMS integration and remote monitoring capabilities.
✅ Increase visibility into alarms, trends, and system performance.
iX CONTROL SOLUTIONS FOR RETROFIT AHU APPLICATIONS
A smarter approach to upgrading existing AHU systems.
The iACS iX Retrofit Solution modernises ageing Air Handling Unit infrastructure with intelligent controls, enhanced connectivity, and energy-focused optimisation strategies. Designed to improve operational performance without full plant replacement, the solution helps facilities reduce energy consumption, improve reliability, and gain greater visibility across HVAC operations.
By combining advanced control technology, flexible integration capabilities, and modern monitoring tools, iX transforms legacy AHU systems into smarter, more efficient building assets while minimising disruption to ongoing site operations.
Improved Energy Efficiency
Modern control strategies allow systems to respond dynamically to occupancy, environmental conditions, and demand.
Reduced Capital Expenditure
Retrofitting controls and key components provides many of the benefits of a new system without the high costs.
Increased Reliability
Replacing obsolete controllers, sensors, and panels improves system stability, reduces downtime risk, and provides easier maintenance.
Better Visibility & Monitoring
Modern retrofit systems provide live system data, alarm monitoring, trend logging, and enhanced BMS visibility.
Improved Occupant Comfort
Optimised airflow control, temperature regulation, and intelligent scheduling help deliver more stable indoor environments.
Explore our
key statistics
An in-depth look at the key metrics driving our company's achievements within controls projects and in-house expertise.
40+
Years of experience
Decades of expertise in designing and delivering control projects.
4K+
Controls projects delivered
Successful projects across a wide range of sectors.
Explore our
key statistics
An in-depth look at the key metrics driving our company's achievements within controls projects and in-house expertise.
40+
Years of experience
Decades of expertise in designing and delivering control projects.
4K+
Controls projects delivered
Successful projects across a wide range of sectors.
HOW RETROFIT AHU SYSTEMS WORK
Intelligent retrofit solutions designed to modernise performance and maximise efficiency...
The iACS Retrofit Solution transforms existing AHU infrastructure with intelligent controls, modern connectivity, and performance-driven optimisation.
HOW RETROFIT AHU SYSTEMS WORK
Intelligent retrofit solutions designed to modernise performance and maximise efficiency...
The iACS Retrofit Solution transforms existing AHU infrastructure with intelligent controls, modern connectivity, and performance-driven optimisation.
1
System Assessment & Site Survey
We begin with a detailed review of your existing AHU infrastructure to identify opportunities for improvement.
2
Intelligent Control Upgrades
Legacy controls are replaced or upgraded with modern intelligent controls tailored to your application.
3
Integration & Commissioning
Our engineers integrate the upgraded system with existing BMS platforms, implement remote visibility and a fully commissioned system.
4
Ongoing Optimisation & Support
Following installation, we provide ongoing support, performance reviews, and optimisation to help maximise long-term energy savings.
EVOLVING AHU RETROFIT SOLUTIONS
How modern retrofit controls compare to traditional AHU upgrades...
Traditional AHU upgrade approaches often focused only on replacing failed components or maintaining ageing controls infrastructure. While these systems provided basic functionality, they frequently lacked modern connectivity, intelligent optimisation, remote visibility, and scalable integration capabilities required by today’s buildings.
Traditional AHU Retrofits
Challenges commonly found in legacy retrofit projects:
Limited remote visibility and monitoring capabilities.
Older systems often require on-site interaction with little or no access to live operational data remotely.
Complex integration with modern BMS infrastructure.
Additional hardware, gateways, or engineering time may be required to connect legacy controls into modern building systems.
Higher installation time and increased wiring complexity.
Traditional retrofit methods can involve extensive panel modifications, rewiring, and increased labour costs.
Minimal optimisation and limited energy intelligence.
Legacy systems typically lack advanced monitoring, energy analytics, and intelligent control strategies.
Difficult future scalability and upgrade limitations.
Older platforms can become increasingly difficult to support, expand, or integrate with evolving building technologies.
iACS iX Retrofit Solution
What the iX retrofit platform delivers:
Remote connectivity and intelligent system visibility.
Monitor, access, and manage AHU performance remotely through modern intelligent control interfaces.
Simplified BMS integration and flexible communications.
Designed to support seamless integration into existing building management infrastructure.
Reduced installation time and streamlined retrofit deployment.
Modern control architecture helps reduce wiring complexity, panel footprint, and installation disruption.
Advanced optimisation and energy focused control strategies.
Improve operational efficiency through intelligent monitoring, scheduling, alarming, and control optimisation.
Future-ready retrofit platform with scalable functionality.
A flexible intelligent controls solution designed to adapt to future building and HVAC requirements.
WHERE THE iACS RETROFIT SOLUTION IS USED
Retrofit Solutions Tailored to Your Building...
The iACS Retrofit Solution is designed to modernise existing AHU infrastructure across a wide range of commercial and industrial environments, delivering improved energy efficiency, enhanced system visibility, and smarter HVAC performance without the need for complete plant replacement.
Retail & Public Buildings
Implement modern HVAC control strategies that improve occupant comfort while reducing operational costs across large public spaces.
Healthcare Facilities
Improve reliability, monitoring, and environmental control across critical ventilation systems while minimising operational disruption.
Education Buildings
Modernise outdated AHUs and BMS infrastructure with scalable retrofit solutions that improve efficiency and simplify maintenance.
Industrial & Manufacturing
Enhance ventilation performance, system visibility, and plant reliability with robust retrofit solutions tailored to demanding environments.
Most existing Air Handling Units can benefit from a retrofit solution, particularly systems with ageing controls, limited monitoring capability, inefficient operation, or unreliable components. Our engineers carry out a detailed site assessment to evaluate the current infrastructure, identify improvement opportunities, and recommend the most effective upgrade strategy for your application.
Yes. Modern intelligent controls can significantly improve AHU efficiency by optimising fan speeds, valve control, scheduling, temperature management, and airflow strategies. By reducing unnecessary energy consumption and improving system responsiveness, retrofit upgrades can help lower operational costs while improving overall building performance.
The iACS retrofit solution is designed with flexible integration in mind and can support communication with a wide range of Building Management Systems. Our solutions can provide improved visibility, alarms, trend logging, remote monitoring, and enhanced control functionality while working alongside existing site infrastructure.
Retrofit projects are designed to minimise disruption wherever possible. Because the existing AHU infrastructure is retained, upgrades can often be completed faster and with less downtime compared to full unit replacement. Our team works closely with site operators to plan installation and commissioning around operational requirements.
Yes. One of the key advantages of a retrofit approach is the ability to modernise the controls system while retaining the existing AHU mechanical structure where suitable. This allows buildings to benefit from modern intelligent automation, improved efficiency, and enhanced monitoring without the capital cost of complete AHU replacement.
Following installation and commissioning, iACS provides ongoing technical support, optimisation reviews, maintenance assistance, and performance monitoring services. Our aim is to ensure each retrofit solution continues to operate efficiently while delivering long-term reliability, operational stability, and energy savings.
FREQUENTLY ASKED QUESTIONS
AHU Retrofit
Here are some common questions about our AHU Retrofit solution...
DESIGN & RESOURCES
Tools and resources to support every stage.
Installing
Our in-house team provides unmatched quality, with expert wiring and integration.
Commissioning
We optimise your units performance for optimal comfort and maximum efficiency.
Software Development
Custom software, automation, and control solutions around unique projects
DESIGN & RESOURCES
Tools and resources to support every stage.
Installing
Our in-house team provides unmatched quality, with expert wiring and integration.
Commissioning
We optimise your units performance for optimal comfort and maximum efficiency.
Software Development
Custom software, automation, and control solutions around unique projects
DESIGN & RESOURCES
Tools and resources to support every stage.
Installing
Our in-house AHU installation team provides unmatched quality, with expert wiring and integration.
Commissioning
We optimise your AHU's performance for optimal comfort and maximum efficiency.
RUBIX QUOTATION TOOL
Get your AHU control quote instantly.
Use Rubix to configure your AHU control system with precision, selecting components, defining control strategies, and tailoring every detail to your project requirements.
Instantly generate accurate pricing, complete BMS points lists, descriptions of operation, and technical documentation without the usual back-and-forth.
Contact Our Team
Fill in our contact form below and let's schedule a call with our HVAC controls experts at iACS!
Contact Our Team
Fill in our contact form below and let's schedule a call with our HVAC controls experts at iACS!
BLOGS
Learn More About AHU Retrofits
Why AHU Retrofit Projects Fail Without a Smarter Controls Strategy
Discover why AHU retrofit projects fail without intelligent HVAC controls. Learn how smart AHU retrofit strategies improve efficiency, airflow and operational performance...
AHU Retrofit vs Full AHU Replacement: Which Is More Cost Effective?
Compare AHU retrofit vs full AHU replacement costs, energy savings and operational benefits. Learn how smart HVAC controls improve retrofit performance and ROI...
The Hidden Energy Problem in Ageing AHUs Isn’t the Equipment, It’s the Controls
Discover why ageing AHUs waste energy due to outdated controls and how intelligent iX AHU controls improve airflow, efficiency and operational performance...
How Smart AHU Retrofits Reduce Energy Costs & Improve Building Performance
Discover how smart AHU retrofit solutions reduce HVAC energy costs, improve airflow performance and modernise ageing systems through intelligent AHU controls...