In the high-humidity environment of Kuala Lumpur, the Fresh Air System is the most critical link between outdoor conditions and indoor comfort. It is responsible for bringing in oxygen and maintaining "Positive Pressure" to keep out tropical heat and haze. If your fresh air volume is too low, the building becomes "stale" (high CO2); if it is too high, your cooling coils will be overwhelmed by moisture, leading to mold and massive energy waste.
As part of a Ventilation Systems Audit, EKG performs a mechanical and volumetric evaluation to ensure your "Make-up Air" is balanced for health, safety, and efficiency.
Fresh air is the "Lungs" of your HVAC system. An evaluation identifies four major risks:
The "Sick Building" Risk: Low fresh air intake leads to the buildup of Volatile Organic Compounds (VOCs) and CO2, causing occupant drowsiness and reduced productivity.
Humidity Infiltration: If the fresh air fan is underperforming, the building goes "Negative," sucking in unconditioned, humid air through doors and windows. This causes "sweating" on vents.
Filter Loading & Haze: During KL's haze seasons, fresh air intakes pull in PM2.5 particulates. If the filtration is not evaluated and upgraded, these pollutants enter the office directly.
Damper Seizure: We often find that motorized fresh air dampers have rusted or snapped their linkages, remaining 100 percent closed even when the BMS says they are open.
We use precision metrology to map the journey of fresh air into your building:
Volumetric Flow Measurement: We use Pitot-Static Traverses and Thermal Anemometers to measure the actual cubic feet per minute (CFM) entering the intake plenum.
CO2 Concentration Mapping: We measure the CO2 levels at the intake (outdoor) versus the supply (indoor). This proves if your "Fresh Air" is actually being mixed or if it is being "short-circuited" out of the building.
Filter Delta-P Analysis: We measure the pressure drop across the fresh air filters. High resistance here chokes the fan and forces the motor to draw excessive current.
VFD Load Synchronization: We audit your Variable Frequency Drive (VFD) settings. Many fresh air fans run at 50Hz (Full Speed) 24/7, even when the building is empty, wasting thousands of Ringgit.
Fresh air is the most expensive air to treat because it is hot and wet. An evaluation finds the "Sweet Spot" where you have enough air for health but not so much that you waste power.
Dynamic Speed Control: By accurately measuring the required intake, we can tune your fan to run at the lowest possible speed to satisfy the building's oxygen needs.
The Logic: Because of the Cube Law, a 20 percent reduction in fan speed results in a nearly 50 percent reduction in power consumption. A Fresh Air Evaluation provides the "Volumetric Proof" needed to safely lower your VFD frequencies.
| Audit Metric | Healthy Range | Failure Symptom |
| Outdoor Air (OA) Volume | Matches Design CFM | Stuffy Air / High CO2 (>1000 ppm) |
| Intake Velocity | 2.5 to 4.0 m/s | Water Ingress (Rain Sucking) |
| Filter Resistance | 50 to 125 Pa | Motor Overheating / Low Airflow |
| Building Pressure | +5 to +12 Pa | Lobby Doors Hard to Open / Sweating |
| Damper Operation | Smooth 0-100% | Seized / Squealing / BMS Error |
Mechanical Restoration Path: If the evaluation shows low intake, we don't just give you a report. We are experts in Mechanical Fan Overhauls, offering chemical cleaning of intake louvers, bearing replacements, and damper repairs.
DOSH & JKKP Compliance: We ensure your ventilation rates meet the latest 2026 Malaysian Industrial Code of Practice for Indoor Air Quality.
VFD ROI Projection: We calculate the exact energy savings you will achieve by switching from a "Fixed Intake" to a "Demand-Controlled" fresh air system.
Haze Protection Strategy: We provide recommendations for high-efficiency MERV filtration to keep your indoor air clean even during peak outdoor pollution periods.
Malaysia
