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EC Fans and FanGrid Arrays for Data Center & AHU Retrofit
LONGWELL engineers and manufactures EC fan platforms in Yuyao, China for integration into CRAH, CRAC and air-handling equipment. Share the actual duty point, electrical supply, control interface, ambient conditions and installation envelope to receive a matched model, performance curve, drawing and applicable model-specific documents.
- Yuyao, China manufacturing
- 1M+ company-wide annual capacity
- ISO 9001 · 14001 · 45001 systems
- Documents checked by model
Capacity is company-wide, not a data-center-only line. Product approvals, controls, ingress protection and electrical configurations vary by model and destination.
One engineering brief, two buying paths
Start with the equipment and the installed duty—not a headline efficiency claim
The same EC platform can serve a new cooling unit or a retrofit, but the evidence and acceptance plan are different. Choose the path that matches your project stage.
CRAH, CRAC and AHU platform integration
Build a shortlist around the required operating point, available power, controls and mechanical envelope. Then validate the curve, drawing and exact configuration before prototype release.
- Single EC plug fan or parallel array
- Control option confirmed by model
- Drawing, curve and document pack tied to the part number
- Quantity and production timing reviewed with the RFQ
Legacy fan section to EC plug fan or FanGrid
Document the present fan, actual airflow and pressure, electrical input, space and control sequence. Energy and payback are calculated from the project baseline; no universal saving percentage is assumed.
- Existing fan or motor nameplate and photos
- Measured or design duty point and operating hours
- Inlet, outlet and service-clearance envelope
- Controls, redundancy target and commissioning scope
Product routes
Move from application intent to an inspectable model
Each route links the commercial overview to the selection catalog. The selector lists model data; the final choice is checked on its P-Q curve at the required duty point.
EC plug fans
For plenum-mounted AHU and CRAH sections, including multi-fan array concepts.
EC backward-curved fans
For higher-static-pressure OEM equipment where the impeller, drive and installation format must be matched together.
EC forward-curved fans
For compact, lower-pressure ventilation equipment where packaging and the complete fan curve drive selection.
FanGrid boundary: a parallel fan array can be designed to support maintenance access and an N+1 objective. Redundancy depends on array sizing, controls, failure logic and system testing; it is not automatic simply because several fans are installed.
Selection workflow
Five gates from enquiry to a buildable proposal
Baseline
Record the present unit, operating schedule and the problem to solve.
Duty point
Give airflow and static pressure at the installed condition, not two catalogue maxima.
Fit & controls
Confirm envelope, inlet geometry, voltage, frequency, signal and BMS needs.
Evidence
Review model curve, drawing, electrical data and applicable documents.
Validation
Agree prototype, unit test, controls test and commissioning responsibilities.
| Input | What to send | Why it changes the selection |
|---|---|---|
| Air performance | Required airflow, static pressure, normal and peak operating points | Places the real operating point on the model curve and exposes margin. |
| Electrical | Voltage, frequency, phase, allowable input power and wiring constraints | Prevents a mechanically suitable fan being quoted in the wrong electrical configuration. |
| Controls | 0–10 V, PWM or communications requirement; alarm and failover logic | Control options and register maps are model/configuration specific. |
| Mechanical | Existing model, photos, inlet/outlet dimensions, mounting and service access | Determines whether a standard fan, adapter or redesigned section is required. |
| Environment | Temperature at fan inlet, humidity, dust, corrosion exposure and required IP level | Protection and material choices must be verified for the actual environment. |
| Commercial | Destination, quantity, prototype need, target date and required documents | Connects the engineering shortlist to a realistic supply and approval plan. |
Evidence before claims
What the proposal can include
The document set is matched to the exact model and destination. A management-system certificate is not treated as a blanket product approval, and an in-house test method is not presented as third-party certification.
Model evidence
Performance curve, dimensional drawing, electrical data, available controls and catalog datasheet for the shortlisted part number.
Compliance scope
Applicable CE, ETL, RoHS or other files are checked against the named series/model and destination requirement.
Factory & quality
Company-wide production, quality-system and engineering-test capabilities support OEM review and repeat-order planning.
PUE and Tier scope: PUE is a facility-level energy metric, and Uptime Tier certification applies to the data-center system. A fan component alone cannot guarantee either outcome. Use fan input power in the project energy model and validate redundancy at system level.
Existing engineering resources
Cases, calculators and checks in one route
CRAH FanGrid retrofit
An anonymized composite design example—not a named customer performance claim. Use it to frame the questions, then calculate your own project.
Fan-wall redundancy calculator
Explore array count and an N+1 design target. Confirm controls, operating margin and failure response during system validation.
AC-to-EC retrofit ROI guide
Calculate energy and payback from measured input power, operating hours, tariff and project cost instead of a universal percentage.
Balance airflow across a fan wall
Review layout and uniformity questions that sit beyond selecting an individual fan.
UAE & Saudi Arabia projects
A separate intake page for electrical, ambient, dust, coastal and import-document requirements in Middle East projects.
Certificates & declarations
Browse published files, then request the current document pack for the exact model under review.
Project RFQ
Send enough data for an engineering answer
For the first review, the most useful attachment set is a fan schedule or nameplate photo, one dimensional sketch and the required duty points. Submit the brief below; drawings can be exchanged in the reply thread.
- Application and project country
- Airflow + static pressure
- Voltage, frequency and control
- Envelope + ambient conditions
- Quantity, timeline and document list
Manufacturing base: Yuyao, China. Delivery, installation and on-site scope are confirmed in writing per project.
FAQ
Questions procurement and engineering teams ask first
Can LONGWELL quote from airflow alone?
Not reliably for an AHU or data-center cooling unit. Provide airflow and static pressure at the installed condition. If only system information is available, send the fan schedule, filters, coil and duct information so the assumptions can be made explicit.
Does every EC fan support 0–10 V, PWM and Modbus?
No blanket control claim is made. Available controls, alarms and communications are confirmed for the exact model and configuration in the proposal.
Is a multi-fan array automatically N+1?
No. N+1 is a system design objective. The number of fans, duty point after one fan is unavailable, control response, alarms and failure test all need to be defined and validated.
Can you provide CE, ETL or RoHS documents?
Published documents are available for specified product families and model lists. The current file and its scope are checked against the exact proposed part number and destination before it is treated as applicable.
What is needed to calculate retrofit payback?
Use measured or defensible baseline fan input power, proposed input power at the same duty, annual operating hours, local tariff and total project cost. The result is project-specific; LONGWELL does not apply one universal energy-saving percentage.
English working version · Reviewed 14 September 2026