Air Handling & Treated Fresh Air Systems

Efficient Air Solutions for Indian Infrastructure

AHU and TFA systems are integral to India’s HVAC infrastructure, ensuring comfort, air quality, and compliance across sectors like healthcare, education, IT, and more.

Air Handling Units and TFA

Air Handling Unit (AHU) and Treated Fresh Air (TFA) System

As the demand for indoor comfort and healthy environments continues to grow in India’s residential, commercial, and industrial sectors, HVAC systems have become essential. Among the most important components are the AHU and TFA systems, ensuring good indoor air quality (IAQ) even in polluted urban areas.

1. Introduction to Air Handling Unit (AHU)

  • Filtering air to remove dust, smoke, and particulates.
  • Cooling or heating using chilled water coils or heaters.
  • Dehumidifying or humidifying for comfort.
  • Recirculating indoor air to conserve energy.
  • Mixing return air and fresh air for improved IAQ.

2. AHU Components

  • Filters (essential for India’s pollution levels)
  • Cooling/Heating Coils
  • Fans and Blowers (centrifugal or axial)
  • Dampers for air volume control
  • Mixing Chambers for air blending

3. Types of AHUs

  • Draw-Through and Blow-Through AHUs
  • Single-Zone and Multi-Zone
  • Modular AHUs for custom needs (hospitals, malls, data centers)

4. Treated Fresh Air (TFA) System

TFA Units introduce fresh air after conditioning, which is crucial due to India’s hot, dusty, and polluted outdoor air. Especially important in high-occupancy spaces like offices, schools, and hospitals.

5. TFA Components

  • Pre-Filters and Fine Filters
  • Cooling Coil (chilled water or DX)
  • Optional Heater Coil
  • Fan Section for air delivery
  • Dampers for automated control

6. Integration of AHU and TFA

Modern HVAC integrates AHU + TFA for:

  • Energy efficiency through return air reuse
  • Maintained indoor air quality
  • Positive pressure and humidity control

7. Applications in India

  • Commercial: Offices, hotels, malls, multiplexes
  • Hospitals and Labs
  • IT/Data Centers
  • Industries
  • Educational Institutions

8. Key Benefits

  • Improved Health and Productivity
  • Better Odor and Humidity Control
  • Pollution Management
  • Energy Savings

9. Maintenance and Challenges

  • Filter cleaning/replacement due to dust load
  • Regular coil cleaning
  • Fan and motor inspection
  • Drain line management during humid seasons

Proper design and timely maintenance are critical for long-term performance, especially in India's pollution-heavy and diverse climate zones.

Conclusion: AHU and TFA systems are not just about comfort—they are vital for health, compliance, and energy efficiency in India’s built environment. With urbanization and green building demand rising, investing in high-quality AHU and TFA infrastructure is a smart, sustainable choice.