We specialize in EC Fan Retrofit Solutions for existing Air Handling Units (AHUs), where we replace the old belt and pulley-driven systems with high-efficiency EC fans or arrays of EC fans, depending on the required airflow (CFM) and static pressure. This retrofit approach transforms aging AHUs into modern, energy-efficient systems with optimized performance and minimal maintenance. Our retrofit projects range from single-fan replacements to large fan arrays. With more than 25,000 EC fans installed across industries such as automobiles, pharmaceuticals, FMCG, healthcare, hospitals, hospitality, malls, textiles, and comfort cooling, our solutions have consistently delivered 40–60% energy savings and drastically reduced operational costs.
Beyond energy efficiency, EC fan retrofits eliminate the need for belts, pulleys, and related maintenance, providing higher reliability, quieter operation, and longer system life. With typical payback periods of around 2 years and EC fan lifespans exceeding 10 years, the savings far outweigh the investment, ensuring long-term financial and operational benefits.
By upgrading AHUs with plug fans using EC motor technology, organizations can realize significant reductions in OPEX, improved sustainability, and hassle-free maintenance.
An energy retrofit leads to substantially reduced energy consumption over conventional systems based on detailed analysis of existing system parameters. The resultant of our Aad Tech Retrofit Solutions is sometimes more than 50% reduction in power consumption dependent upon variable factors.
Energy efficiency has become an integral part of building services design, maintenance and upgrade. Many organisations overlook air handling units (AHU’s) when looking to save energy. Upgrading AHU’s with plug fans using EC motor technology can realise significant savings in energy, maintenance and more.
| PARAMETER | CONVENTIONAL FAN | EC FAN |
|---|---|---|
| Motor Efficiency | 70-85% | 93-95% |
| Belt Maintenance | Required | Not Required |
| Bearing Maintenance | Required | Not Required |
| Copper Loss | High | Non-Existent |
| Slip Loss | Yes | No |
| Belt & Pulley Losses | Yes | No |
| Blower Weight | Heavy | Light |
| Corrosion Resistance | No | Yes |
| Vibration Pads | Required | Not Required |
| Soft Start | Additional Equipment Required | Built-In |
| Motor Heat Loss | Yes | No |
Retrofit when the casing, coils and structure are sound and the fan section is what wastes energy. It keeps your ducting, layout and any validated setup undisturbed, and it costs less than a new unit. Replace the whole AHU when the casing is corroded or leaking, the coils have failed, or your airflow needs have changed. If you need a new unit, see our Air Handling Units.
We survey your AHU and measure its actual operating conditions rather than relying on nameplate data. We then design and size the EC fan or array, fabricate it to fit your unit, install and commission it, and set up the controller. Optional IoT monitoring and an annual maintenance contract (AMC) follow after handover.
No ducting or layout changes are needed, so validated systems in pharma and cleanrooms are not disturbed. Installation is scheduled around your production calendar, and because fans are sized and cut to fit before we arrive, there is no on-site improvisation. The time depends on the number and size of your AHUs, and we confirm it after the survey.
Belt-driven AHUs that run for long hours (24×7), run at constant speed regardless of demand, or have ageing motors with rising maintenance are the strongest candidates. AHUs with falling airflow or unstable room conditions also benefit. AHUs that run only a few hours a year gain less, so the savings may not justify the cost.
Cost depends on the number and size of the fans, the controller and whether you want BMS or IoT connectivity, so there is no fixed price. For a quote, we need each AHU’s airflow (CFM), static pressure, motor kW, daily running hours and a photo of the fan section. You can buy outright, or choose a performance-linked shared-savings model that is paid from the energy saved. A free energy audit shows which option suits your site.
