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R&D, test labs & certifications

Every performance figure on this site comes from our own laboratories, not from scaling a similar model. The labs cover aerodynamic performance, noise, life and environmental endurance; third-party test reports are available on request for project verification.

Test & validation capability

LONGWELL Wind-tunnel laboratory
Wind-tunnel laboratoryAirflow – static pressure curves measured per AMCA 210 / 211 methods. This is the source of every performance figure on this site.
LONGWELL Semi-anechoic noise room (B&K instrumentation)
Semi-anechoic noise room (B&K instrumentation)Sound power and sound pressure measured per AMCA 300 methods, used for low-noise development and verification.
LONGWELL High-temperature laboratory
High-temperature laboratoryContinuous running at elevated temperature verifies motor insulation class and bearing lubrication at the limit.
LONGWELL Burn-in (ageing) laboratory
Burn-in (ageing) laboratoryBatch burn-in screening removes early failures and keeps delivery batches consistent.
LONGWELL Life testing
Life testingBearing and complete-fan life tests supporting the L10 = 60,000 h design value.
LONGWELL Prototype duty-point verification
Prototype duty-point verificationEvery prototype is measured on the wind tunnel at its duty point and released only when it sits in the efficient range.

Semi-anechoic chamber

Absorbent wedge walls and a multi-point microphone array; sound power and sound pressure per AMCA 300 methods. All noise data on this site is produced here.

LONGWELL Semi-anechoic chamber
LONGWELL Semi-anechoic chamber
LONGWELL Semi-anechoic chamber

Outdoor reliability field

Long-cycle continuous running of complete fans; each unit carries a reliability-test tag recording start / end date and duty.

LONGWELL Outdoor reliability field
LONGWELL Outdoor reliability field
LONGWELL Outdoor reliability field

High-temperature ageing laboratory

Insulation class and bearing lubrication tested at limit temperature in the environmental chambers.

LONGWELL High-temperature ageing laboratory
LONGWELL High-temperature ageing laboratory
LONGWELL High-temperature ageing laboratory

Final test line

Every fan is powered up and tested, with performance sampling, before it enters the warehouse.

LONGWELL Final test line

Core technology: bionic blade profile

The third-generation platforms — LWBE3G backward curved centrifugal and LWAE3G EC axial — use a bionic blade profile. Compared with a conventional profile at the same operating point:

+5–8points static efficiency
−4–6dB(A) noise
−30%axial tip speed vs. industry baseline
60,000 hL10 bearing design life

Final selection is confirmed at the duty point (airflow / static pressure / voltage / control mode) and by project validation — use the selector or send us the duty point.

Engineering support

Selection & simulation

Aerodynamic matching from your duty point; CFD analysis of the flow path and structure where the project needs it.

Control interfaces

0–10 V, PWM, Modbus RTU, BACnet MS/TP and CANopen for BMS / SCADA integration.

Ingress protection

IP55 standard on the EC axial platform; up to IP68 for outdoor, coastal or wash-down duties.

Custom development

Impeller, scroll, motor and control mode configured to the application; samples in 1–3 days.

Certifications & compliance

All certificates below can be verified by number on the issuing body's website. Product compliance (CE / ETL / RoHS / FCC) is obtained per product line and the covered range differs by line — for a Declaration of Conformity for a specific model and destination country, tell us the model and country and we issue the document.

ISO 9001 / 14001 / 45001BMCQ0222448M · BMCE0222279M · BMCS0222232MQuality, environmental and OH&S management systems. Scope: design and production of HVACR ventilation products (fans and fan-type appliances) for export. Current cycle 22 Dec 2025 – 8 Dec 2028, issued by Benchmarks Certification & Testing (Zhejiang); verifiable by certificate number at CNCA (cnca.gov.cn).
CE conformityEMC 2014/30/EU · LVD 2014/35/EUCovers the centrifugal, axial, inline duct and forward-curved blower lines; the certificate text lists the model range. Tested to EN IEC 55014-1 / -2, EN 61000-3-2 / -3-3 and the applicable safety standards by SGS.
ETL listed (North America)UL 507 + CSA C22.2 No. 113 · Intertek control no. 5022563DC 12 / 24 / 48 V and EC 115 / 230 V centrifugal and cross flow fans, for North American market access.
RoHS · FCC · REACH · BSCI · CCCplus registered trademarks and design patentsHazardous-substance restriction, EMI, chemical regulation and supply-chain social-compliance audit; LONGWELL / ZJLONGWELL trademarks and European design patents.

Certificate originals

Grouped by certificate type — click to open the scan.

ISO 9001 / 14001 / 450011 file

Quality, environmental and occupational health & safety management systems; scope: design and production of HVACR ventilation products. Certificates BMCQ0222448M / BMCE0222279M / BMCS0222232M, valid to 2028-12-08.

ISO 9001 / 14001 / 45001 management system certificate — LONGWELL certificatePDFISO 9001 / 14001 / 45001 management system certificate

CE2 files

CE declarations and test reports

CE test report — LONGWELL certificatePDFCE test reportCE certificate — LONGWELL certificateCE certificate

CE-EMC3 files

EMC Directive 2014/30/EU certificates of conformity

CE-EMC test report — LONGWELL certificatePDFCE-EMC test reportCentrifugal fan CE-EMC test report — LONGWELL certificatePDFCentrifugal fan CE-EMC test reportDuct fan CE-EMC certificate — LONGWELL certificatePDFDuct fan CE-EMC certificate

CE-LVD6 files

Low Voltage Directive 2014/35/EU certificates of conformity

CE-LVD test report — LONGWELL certificatePDFCE-LVD test reportCentrifugal fan CE-LVD test report — LONGWELL certificatePDFCentrifugal fan CE-LVD test reportCentrifugal fan CE-LVD test report — LONGWELL certificatePDFCentrifugal fan CE-LVD test reportDuct fan CE-LVD certificate — LONGWELL certificatePDFDuct fan CE-LVD certificateCentrifugal fan CE-LVD test report — LONGWELL certificatePDFCentrifugal fan CE-LVD test reportDuct fan CE-LVD certificate — LONGWELL certificatePDFDuct fan CE-LVD certificate

ETL11 files

North American listing by Intertek, control number 5022563 (UL 507, CSA C22.2 No. 113)

Centrifugal fan DC ETL test report — LONGWELL certificatePDFCentrifugal fan DC ETL test reportCross flow fan DC ETL certificate — LONGWELL certificatePDFCross flow fan DC ETL certificateCentrifugal fan EC ETL test report — LONGWELL certificatePDFCentrifugal fan EC ETL test reportCentrifugal fan DC 12/24/48 V ETL certificate — LONGWELL certificatePDFCentrifugal fan DC 12/24/48 V ETL certificateCross flow fan ETL certificate — LONGWELL certificateCross flow fan ETL certificateCross flow fan ETL certificate — LONGWELL certificatePDFCross flow fan ETL certificateCross flow fan DC 12/24/48 V ETL test report — LONGWELL certificatePDFCross flow fan DC 12/24/48 V ETL test reportCentrifugal fan EC 115/220 V ETL certificate — LONGWELL certificatePDFCentrifugal fan EC 115/220 V ETL certificateETL certificate — LONGWELL certificatePDFETL certificateETL certificate — LONGWELL certificateETL certificateCentrifugal fan EC 115/220 V ETL test report — LONGWELL certificatePDFCentrifugal fan EC 115/220 V ETL test report

RoHS6 files

Restriction of hazardous substances test reports

Axial fan RoHS certificate — LONGWELL certificatePDFAxial fan RoHS certificateCentrifugal fan RoHS test report — LONGWELL certificatePDFCentrifugal fan RoHS test reportCentrifugal fan RoHS test report — LONGWELL certificatePDFCentrifugal fan RoHS test reportCentrifugal fan RoHS test report — LONGWELL certificatePDFCentrifugal fan RoHS test reportForward curved blower RoHS test report — LONGWELL certificatePDFForward curved blower RoHS test reportShaded-pole motor RoHS certificate — LONGWELL certificatePDFShaded-pole motor RoHS certificate

FCC2 files

FCC electromagnetic interference certification

Duct fan FCC certificate — LONGWELL certificatePDFDuct fan FCC certificateDuct fan FCC certificate — LONGWELL certificatePDFDuct fan FCC certificate

BSCI4 files

Business Social Compliance Initiative audit

BSCI social compliance audit certificate — LONGWELL certificatePDFBSCI social compliance audit certificateBSCI social compliance audit certificate — LONGWELL certificatePDFBSCI social compliance audit certificateBSCI social compliance audit certificate — LONGWELL certificateBSCI social compliance audit certificateBSCI social compliance audit certificate — LONGWELL certificatePDFBSCI social compliance audit certificate

Patent3 files

Design and utility patents

Patent certificate — LONGWELL certificatePatent certificateEuropean design patent certificate — LONGWELL certificatePDFEuropean design patent certificateEuropean design patent certificate — LONGWELL certificateEuropean design patent certificate

Trademark3 files

LONGWELL / ZJLONGWELL registered trademarks

ZJLONGWELL trademark registration — LONGWELL certificateZJLONGWELL trademark registrationLONGWELL trademark registration (class 11) — LONGWELL certificatePDFLONGWELL trademark registration (class 11)LONGWELL trademark registration — LONGWELL certificateLONGWELL trademark registration

Scans of original certificates held by Ningbo Longwell Electric Technology Co., Ltd. Need a Declaration of Conformity for a specific model or market? Ask us.

Give us the duty point and let the data speak

Airflow, static pressure, voltage and mounting — our engineers match a model on its measured curve and reply with the curve, sample lead time and price. Non-standard impellers, scrolls and control modes can be developed.

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