Conversion of Air Handling Units (AHU) to Electronically Commutated (EC) Fans for Energy Efficiency: Embassy TechVillage Block-2, 2B Tower-1, 6th & 7th floors, Express Tower, Embassy Splendid TechZone B3 Block
The use of belt-driven Air Handling Units (AHU) systems results in energy inefficiency, maintenance challenges, and limited control over performance. With the increasing demand for energy-efficient, sustainable, and low-maintenance HVAC solutions in our operations, we decided to implement the following:
- Embassy TechVillage, Bengaluru: 4 AHUs in Block-2, Tower-1 (6th & 7th floors) retrofitted with EC fans for improved energy efficiency and performance.
- Express Tower, Mumbai: Replacement of 9 outdated AHUs with EC fan-integrated systems equipped with MERV 13 filters to enhance IAQ.
- Embassy Splendid TechZone, Chennai: Retrofit of 39 belt-driven AHUs in B3 Block with 78 EC fans to reduce energy use and align with emission reduction goals.
Implementation Cost, Annual Energy and Cost Savings (FY2025)
- Embassy TechVillage:
Initial Investment: Rs 1,400,940
Energy Savings: 40,500 kWh
Cost Savings: Rs 328,000 - Express Tower:
Initial Investment: Rs 7,697,646
Energy Savings: 54,000 kWh
Cost Savings: Rs 723,600 - Embassy Splendid TechZone:
Initial Investment: Rs 9,869,191
Energy Savings: 917,172 kWh
Cost Savings: Rs 3,583,008
Outcomes and Impacts
- Energy Savings: EC fans deliver 40–50% energy efficiency gains, resulting in 30–40% reduction in HVAC-related electricity consumption.
- Cost Efficiency: Significant reduction in electricity costs with quick ROI (2–3 years) despite higher upfront investment.
- Lower Maintenance: Fewer mechanical components reduce wear and tear, lowering service needs and downtime.
- Performance & Control: Variable-speed operation ensures optimal airflow, better thermal comfort, and compliance.
- Enhanced IAQ: MERV 13 filtration (Express Tower) improves indoor air quality by capturing fine particulates and allergens.
- System Reliability: Reduced mechanical stress increases equipment lifespan and operational reliability.
- Noise Reduction: EC fans operate with less vibration and are up to 50% quieter.
- Future-Ready Infrastructure: Scalable and compatible with IoT and smart building systems for long-term adaptability.