Lower input power at the right duty
Compare complete system input kW at the same airflow and pressure, including motor, control and fan performance.
EC fans for AHUs in Malaysia
EC fans for AHUs in Malaysia.
Same required airflow. Same static pressure. Lower input kW.
Upgrade energy efficiency while maintaining the air duty your AHU needs.
Explore Nicotra Gebhardt COPRA EC fans for AHU retrofits, new installations and fan arrays. True Aire helps match your fan system to the required airflow, pressure and operating profile.
AHU retrofit · New AHU specification · Fan arrays
Malaysia selection & supplyTrue Aire Technologies · Puchong, Selangor
Nicotra Gebhardt COPRAEC plenum fans for AHU applications
Model-specific MyHIJAU evidenceCheck the quoted model’s listing →
01 / Why EC fans?
Improve the fan system, not just the motor.
The upgrade target is lower electrical input while maintaining the required airflow and static pressure. Improve the impeller, motor, transmission and control as a complete system.
Backward-curved impeller
COPRA’s aerodynamic blade design may improve the selection against an older forward-curved fan. The actual gain depends on both fan curves and the duty point.
No belt transmission
Remove belt slip, belt wear and pulley alignment from the proposed fan arrangement, along with their associated maintenance.
Reduce losses from poor sizing
Select a fan model or multi-fan arrangement nearer the required airflow, pressure and efficient motor loading. When an existing fan is oversized, this can reduce avoidable part-load losses.
Integrated motor and speed control
COPRA integrates speed control with its EC motor, removing the need for a separate external VSD for that function. Evaluate the combined fan, motor and control input at the required duty.
The proof is a duty-matched comparison.Compare input kW at equivalent airflow and pressure across the operating hours, then calculate annual kWh and cost.Assess my AHU →
Technical basis: COPRA product details · US DOE fan system sourcebook · AMCA fan system efficiency
Energy efficiency upgrade / Case study
Same airflow and static pressure. Lower electrical power.
Upgrade from an AC blower to an EC fan array to reduce electrical input while maintaining the required airflow and static pressure. Compare the two systems across four operating points below.
Maintain airflowMaintain static pressureReduce input kW
BEFORE / AC BLOWERExisting AC blower
Airflow68,876 m³/h
Static pressure932 Pa
Existing system input38.65 kW
AFTER / 6 × EC PLUG FANSCOPRA EC fan array
Airflow69,000 m³/h
Static pressure932 Pa
EC system input25.56 kW
| AC Blower | EC Fan Array | Savings | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Hz | CMH | Pa | kW | Speed (%) | CMH | Pa | kW | kW | % |
| 49.5 | 68,876 | 932 | 38.65 | 100 | 69,000 | 932 | 25.56 | 13.09 | 33.9% |
| 38.3 | 58,127 | 596 | 22.88 | 73 | 58,140 | 596 | 13.86 | 9.02 | 39.4% |
| 28.4 | 44,328 | 310 | 10.89 | 53 | 44,328 | 310 | 5.76 | 5.13 | 47.1% |
| 23.6 | 37,800 | 210 | 7.68 | 44 | 37,800 | 210 | 3.42 | 4.26 | 55.5% |
CMH = airflow in m³/h. EC figures represent the complete six-fan array (6 × PA-C56-JV56-C0000). Savings = AC input − EC input; percentage savings are relative to AC input.
INPUT POWER REDUCTION33.9%
13.09 kW less electrical input.
Same 932 Pa static pressure, with airflow maintained at approximately 69,000 m³/h.
Results shown apply to these operating points. Savings for another AHU depend on the existing system, selected replacement and operating conditions.
AC blower vs EC fan / Upgrade options
Upgrade the whole fan system.
A blade upgrade improves aerodynamics. Direct drive removes the belt transmission. A VSD adds speed control. An EC plug fan brings these improvements together in one selected system.
Indicative retrofit estimates. Savings depend on the existing equipment, selected solution and operating profile. Individual upgrade ranges are not additive; the complete system is assessed together. The 40% figure refers to fan energy, not total building electricity.
Already have a VSD?
Speed control is one part of efficiency. The case study compares AC operation at 49.5, 38.3, 28.4 and 23.6 Hz with an EC array at comparable air duties. EC input power is lower at all four points.
03 / Targeted AHU retrofit
Upgrade the fan compartment.
Retain your existing AHU.
The retrofit replaces the blower assembly inside the fan section. Serviceable casing, filters and cooling coil stay in place, with mounting, electrical and control work adapted for the new fans.
RETAINFilter section
RETAINCooling coil
UPGRADE HEREFan compartment
After retrofit: side profiles of the EC fans and mounting wall, within the existing fan compartment.
The serviceable AHU sections
Existing casing, cooling coil, filter sections and connected ductwork.
The fan system inside
Fan assembly, motor and drive arrangement, with associated mounting, electrical connections and controls.
Typical AHU arrangement. Retained components and installation scope are confirmed during the site assessment.
04 / Meet Nicotra Gebhardt COPRA
Meet COPRA: compact EC airflow for demanding spaces.
Nicotra Gebhardt describes COPRA as an EC plenum fan with a short internal-rotor motor and backward-curved aluminium impeller. The range is suited to AHUs, retrofits and multi-fan arrangements.
- Compact axial length for constrained fan sections
- Integrated motor and electronic control
- Core and Plug variants selected by duty point
- Selected models listed in Malaysia’s MyHIJAU Directory
COPRA product image · Nicotra GebhardtDocumented product evidence
MyHIJAU proof belongs to exact models.
The MyHIJAU Directory names True Aire as distributor for specific COPRA EC Plug Fan models. We show the model codes, listing numbers and expiry dates so procurement teams can check the record directly.
VERIFIED DIRECTORY ENTRY
COPRA EC Plug Fan
Model PA-C45-JM56-C0000 · MyHIJAU listing MyHP00418/25-001 · Valid to 3 September 2028.
Check the MyHIJAU record ↗05 / Project delivery
From site survey to verified savings.
Follow the five stages of your AHU fan upgrade. Open each stage to explore the engineering, financial assessment and installation work.
01SurveyUnderstand the design and measure current operation.
Establish the design and operating baseline.
- Retrieve the original fan design airflow and static pressure.
- Measure current operating airflow, static pressure and electrical input kW.
- Record speed settings, operating hours and relevant control modes.
- Check fan-section dimensions, access and existing electrical supply.
Outcome: a documented baseline and an agreed air-duty requirement.
DESIGN vs CURRENT OPERATION
| Parameter | Original design | Current operation |
|---|---|---|
| Airflow | AHU schedule | Site measurement |
| Static pressure | Design duty | Site measurement |
| Power | Motor / fan data | Measured input kW |
| Control | Design sequence | Actual speed / mode |
02SelectCompare AC blower and EC plug-fan selections.
Select with the fan-selection program.
- Assess the AC blower using available fan data and measured operation.
- Select the EC plug fan or array at the agreed airflow and pressure.
- Compare fan curves, operating range and complete electrical input.
- Confirm dimensions, electrical supply and control interface.
Outcome: the required air duty maintained, with lower selected EC input kW demonstrated against the AC baseline.
AC vs EC / RUNNING POWER
Same air duty. Lower EC running kW.
AC blower input kWEC fan array input kW
AC BLOWER38.65 kW
EC FAN ARRAY25.56 kW
13.09 kW lower · 33.9% reduction
At 932 Pa and approximately 69,000 m³/h
Example operating-point data from the case study. Each AC/EC pair has equal static pressure and approximately equal airflow. Lines connect the four comparison points; they are not manufacturer fan-performance curves. Final project selection includes the actual pressure–airflow curves and input-power data.
03ProposeCalculate energy savings, maintenance and payback.
Turn power savings into a project return.
- Calculate annual kWh from the power difference and operating schedule.
- Apply the electricity rate and annual maintenance-cost difference.
- Compare annual savings with the complete installed investment.
- Present simple payback and cumulative savings over time.
Outcome: an investment proposal with transparent assumptions.
EXPLORE SIMPLE PAYBACK
Annual savingsSimple payback
Illustrative assumptions, editable above. The 13.09 kW example assumes that power difference for all entered hours. A project proposal uses the actual duty schedule, quotation and maintenance costs. Simple payback excludes financing, discounting and tariff changes.
04InstallPlan the shutdown and install the new fan system.
Prepare the site and execute the change.
- Record before-installation airflow, static pressure and input power.
- Agree the shutdown window and safe isolation arrangements.
- Remove the existing blower and install fan-wall mounting and EC fans.
- Complete the electrical panel, cabling and control connections.
Outcome: the new fan system installed within the agreed AHU scope.
INSTALLATION SEQUENCE
- Measure beforeConfirm baseline readings
- Shutdown & isolateCoordinate access and downtime
- Install fan wall & fansMount and secure the new assembly
- Connect electrical panelComplete power and controls
05CommissionIntegrate controls and verify delivered performance.
Integrate, commission and verify.
- Integrate with the existing BMS where available and compatible.
- Check speed commands, operating sequence and available status signals.
- Verify delivered airflow, static pressure and electrical input after installation.
- Compare before-and-after results at agreed operating conditions.
Outcome: a commissioned system and a performance-verification record.
PERFORMANCE HANDOVER
| Check | Before | After |
|---|---|---|
| Airflow (CFM / CMH) | Baseline reading | Verified air delivery |
| Static pressure (Pa) | Baseline reading | Verified duty |
| Electrical input (kW) | Measured AC input | Measured EC input |
| BMS / controls | Existing sequence | Integration checked |
07 / Questions before you upgrade
Clear answers for the first discussion.
Do EC fan savings require reducing airflow?
An efficiency upgrade aims to reduce input power at the same required airflow and static pressure. The comparison above illustrates lower EC input at comparable air duty. Separately, speed control can adjust airflow when building demand changes.
Will an EC fan always save more than my AC fan with a VFD?
No universal percentage applies. Compare the complete systems at equivalent airflow and pressure across the hours and loads you actually operate.
Can COPRA replace a belt-driven blower without replacing the whole AHU?
Often the fan section can be considered for retrofit, subject to the required air duty, available space, structural condition, power, controls and access. An engineering assessment determines suitability.
Is every COPRA fan MyHIJAU listed?
We have verified directory entries for particular COPRA EC Plug Fan model codes. Check the exact model quoted against the current directory record; do not assume that the listing covers the entire range.
What should I send for an initial assessment?
An AHU schedule, existing fan model or nameplate, operating hours and photos are useful. Measured running power, airflow and pressure make the energy comparison stronger.
How much shutdown is required for an AHU retrofit?
The installation window depends on access, mounting and fabrication, electrical work and commissioning. The proposal should identify the planned shutdown and the work needed before the AHU returns to service.
08 / Start your assessment
Send your AHU or fan duty details.
For an existing AHU, send the fan schedule, nameplate, operating hours and any measured running data. For new selections, start with airflow, pressure, quantity, available space and control requirements.
Request assessment or fan selection
Use your preferred channel. No website form stores your project data.
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