Grade A Corporate Office | 12 AHUs

Maintaining indoor air quality in large corporate environments requires systematic HVAC hygiene management. This recent project involved a Grade A office building in Kuala Lumpur experiencing reduced airflow performance and increasing dust complaints from occupants.

Project Overview

• Supply and return air duct cleaning

• AHU internal cleaning (12 units)

• Cooling coil cleaning

• Filter replacement

• Airflow inspection and verification

The building operates 12 Air Handling Units (AHUs) serving multiple office floors. Over time, internal duct surfaces had accumulated particulate matter, while several filters were partially blocked, restricting airflow distribution to workstations.

Issues Identified

During inspection and system assessment, we identified:

• Significant dust accumulation inside supply and return ducts

• Clogged filters affecting static pressure balance

• Reduced airflow at selected workstation zones

• Early signs of coil fouling reducing heat exchange efficiency

These issues not only compromised indoor air quality (IAQ), but also impacted HVAC energy efficiency and occupant comfort.

Technical Execution

Our team conducted sectional duct cleaning using mechanical brushing and negative pressure extraction to remove adhered contaminants. All 12 AHUs underwent:

• Internal chamber cleaning

• Blower section cleaning

• Drain pan inspection

• Coil surface cleaning to restore thermal efficiency

Filters were replaced with new units meeting specified filtration standards. Post-cleaning airflow inspection was performed to verify performance restoration.

Outcome

• Restored airflow performance across office zones

• Noticeable reduction in dust-related complaints

• Improved indoor air quality

• Enhanced HVAC operational efficiency

This project reinforces the importance of periodic duct and AHU maintenance in high-occupancy commercial environments.