Ningbo Longwell Electric Technology Co., Ltd. designs and manufactures HVACR fans and motors — backward and forward curved centrifugal fans, plug fans, axial fans, cross flow fans, inline duct fans and compact cooling fans on AC, DC and EC platforms — for air-handling, refrigeration, data-center, heat-pump and industrial OEMs worldwide.
What this site is for
This is the LONGWELL selection and technical-data center. It holds the complete production catalogue with structured specifications, measured P-Q curves, dimensional drawings, wiring diagrams and datasheets, so that engineers can select a model at the duty point, verify it against the curve and request a quotation without waiting for a sales reply. Marketing content, application stories and news are on longwellfans.com.
Engineering and testing
Fans are developed and tested in-house: semi-anechoic chamber for sound power, wind-tunnel test rigs for P-Q curves according to AMCA 210 / ISO 5801 methods, high-temperature and burn-in chambers for life testing, and a balancing line to G6.3 or better. Test reports are available on request for project verification.
Supply capability
- Samples in 1–3 days, production batches in 15–30 days.
- OEM / ODM: impeller, housing, voltage, lead-out, connector and control interface configured to the application.
- 18-month warranty; CE, ETL, RoHS compliance per product line — see certifications.
- Sales offices in Russia (2022), Türkiye (2023) and Poland (2024).