Wenling fan manufacturer with image-based technical schedules, a broad component/package range and a dated procurement declaration matching its legal name and address.
4 published equipment referencesLatest source review 2026-10-11
01 / COMPANY
What this manufacturer offers
Zhejiang Sihe Fan Co., Ltd., 浙江四合风机有限公司, presents a Wenling manufacturing business for small and medium ventilation fans. Its catalogue includes double-inlet air-conditioning components, external-rotor cabinet fans, plastic duct fans, induction units, axial and mixed-flow ventilation, roof fans and industrial centrifugal ranges. Buyers should separate these constructions before comparing a shared size number or a headline noise claim.
Much of the usable product information is in catalogue images rather than the page's text. The reviewed DF-E, DKT/SDKT, SHG and YDF sheets contain different pressure bases, motor or supply schedules and installation information. The company profile also lists manufacturing equipment and two aerodynamic test chambers, but no current order-specific report was obtained. A government-procurement-hosted declaration dated 4 February 2026 identifies the same legal company and Wenling address as an axial-fan manufacturer. That is a bidder's declaration in a public procurement file, not a government audit or certification of the entire catalogue.
Legal entity
浙江四合风机有限公司Official profile, preserved Tianyancha export and dated public procurement declaration agree on the name. Source
Published location
Baixi Industrial Zone, Chengnan Town, Wenling, Taizhou, ZhejiangOfficial contact address; also named as the axial-fan production address in the bidder's declaration. Source
Published manufacturing equipment
Laser cutting, CNC spinning/stamping/shearing/bending, balancing and coating equipmentEquipment list is a supplier statement; no plant inspection or current machine inventory verified. Source
Published testing facilities
Two fan aerodynamic test chambersManufacturer profile statement; not proof of laboratory accreditation or tests on the purchased assembly. Source
External identity evidence
4 February 2026 procurement declaration identifies Sihe as an axial-fan manufacturerDeclared by 河南绿唐环保科技有限公司 and hosted on the government procurement platform; not an independent conformity finding. Source
Swipe the table, or focus it and use arrow keys, to read conditions and sources.
Manufacturer-published information · SHG
Parameter
Published value
Conditions and evidence
Published materials
One-piece polypropylene casing; ABS impeller
Supplier's construction statement; chemical resistance, fire classification and IP rating are not established. Source
Sizes / speed modes
100, 110, 125, 160 and 200 mm; high/low speed
Family schedule; confirm the actual connection dimension and delivered electrical version. Source
SHG-125 example
230 V/50 Hz, high: 0.14 A, 33 W, 2,250 r/min; airflow 284 m³/h, static pressure 159 Pa; 31 dB at 3 m
One printed catalogue row. Airflow/pressure are listed values, not a confirmed simultaneous duty point; noise weighting not specified by the 3 m column. Source
SHG-125 low-speed row
230 V/50 Hz, low: 0.13 A, 30 W, 1,850 r/min; airflow 248 m³/h, static pressure 106 Pa; 26 dB at 3 m
Separate speed mode, not a continuous modulation guarantee or a selected operating curve. Source
Swipe the table, or focus it and use arrow keys, to read conditions and sources.
Manufacturer-published information · DF-E
Parameter
Published value
Conditions and evidence
Published construction
DF-E double-inlet centrifugal air-conditioning fan
Image-based official sheet. The illustration shows belts/pulleys; the delivered drive and guard scope must be confirmed. Source
Published size schedule
Sizes 2.5–8 with multiple speed and motor entries
Nominal family size labels, not confirmed external dimensions. Source
Example size 2.5 row
1,000 r/min · 0.55 kW, four-pole motor · 2,850–3,650 m³/h · 280–260 Pa total pressure · 65 dB(A)
Printed row. No selected curve, density, noise distance or end-point pairing explanation accompanies this example. Source
Alternative on the same size
Size 2.5 at 1,600 r/min: 1.5 kW, six-pole motor; 4,350–5,200 m³/h; 720–695 Pa total pressure
A different schedule, not performance of the 1,000 r/min option. Fan speed differs from motor pole-derived nominal speed. Source
Air-stream wording
Air / non-self-igniting harmless gases; dust content not above 150 mg/m³
Sheet also excludes particulate matter; seek a clarified medium definition before using it for dusty service. Source
03 / PROJECT REVIEW
Match the Sihe fan construction to the installation and evidence
Compare the supplied assembly, not only the product name
DF-E is a double-inlet centrifugal component illustrated with a belt arrangement. DKT is an external-rotor double-inlet component; SDKT encloses a DKT fan in a cabinet with acoustic lining. SHG is a compact plastic oblique-flow duct fan with two speed settings. YDF uses discharge nozzles to induce room air movement. Each creates a different set of integration tasks.
Air-handling integration
DF-E or DKT needs inlet clearance, motor/drive detail, an outlet connection and an agreed installed duty.
Packaged or duct ventilation
SDKT or SHG needs the actual enclosure/duct dimensions, access, mounting and electrical version.
Room-air induction
YDF needs nozzle geometry and a room-level supply/exhaust design; the unit's own airflow is not the room's effective ventilation rate.
Read the image schedules with their original boundaries
The DF-E sheet uses total pressure. SHG prints static pressure and noise at 3 m. DKT/SDKT has a column labelled rotational speed whose entries resemble the configuration codes used in its dimension table. YDF's small-size airflow line has a descending range. These differences are documented on the individual product briefs rather than normalised into one confident specification.
Ask the supplier for the current controlled sheet and exact variant. Keep voltage/frequency, speed setting, motor and pressure definition attached to every quoted point. The images carry different historical upload dates, but an upload path is not proof of a manufacturer's issue date. Do not treat the website's accessible schedules as a guarantee that every listed motor or configuration is currently supplied.
Translate the equipment list into an inspection request
The profile describes CAD-assisted design, laser cutting, spinning, stamping, shearing/bending, balancing and a coating line. Use that list to ask about impeller forming, casing dimensions, balancing records, surface finish and final running inspection for the actual order. It does not establish throughput, machine condition, coating chemistry or a particular balancing grade.
The two aerodynamic chambers are relevant to a request for a selected curve or a factory test. Agree the installed/test arrangement, pressure basis, speed, density and instrument calibration, and obtain the actual report. The platform has not visited the workshop or verified the chambers' accreditation. A published capability is a question to close in the inspection plan, not a passed test.
Keep old certificate and university statements in context
The detailed company page claims ISO9001:2008 certification and a historical fire-product 3C approval. It does not supply a current issuer result or show which ordered configuration remains covered. Request the dated certificate, annex, model scope and live status before relying on either statement. An old quality-system edition is not a current product approval.
The homepage mentions Shanghai Jiao Tong University, while the detailed profile names the University of Shanghai for Science and Technology. This review has not resolved that difference and does not identify a confirmed present collaboration. The homepage repeats the same patent image; repeated placements are not evidence of several separate patents or current patent rights.
What the public procurement file actually establishes
The complete two-page attachment is a domestic-product declaration stamped by Henan Lvtang Environmental Protection Technology Co., Ltd. and dated 4 February 2026. Its second product entry identifies Sihe as the axial-fan factory and gives the Baixi Industrial Zone address. This matches the official contact information and provides a separate, dated business reference.
It does not specify a reviewed DF-E, DKT/SDKT, SHG or YDF model, authenticate their performance, or provide a government-issued certificate. The declaring bidder accepts responsibility for its statements; government hosting does not transform them into a factory inspection. No revenue, headcount or certification from a search snippet has been added to this profile.
Documents that make the next enquiry useful
Choose the actual construction and send the duty, pressure definition, air conditions, environment, supply/control version, available envelope and service access. Request the selected variant, corrected parameter schedule, curve where needed, dimensional drawing, included accessories and test/inspection plan. For YDF, add the space layout and supply/exhaust routes; for a cabinet, state the enclosure and attenuation scope.
The contact page reviewed here supplied an address and telephone details but no official email. The private CRM website-email field remains empty rather than borrowing an address from the source spreadsheet. Stock, MOQ, price, lead time, warranty, current certification and overseas support remain unconfirmed. The factory is presented as an editorial listing, not as an independently audited or claimed supplier.
07 / TRANSPARENCY
Sources and review scope
Compiled by HVACDeck Editorial. Page review: 2026-10-11. Publications are attributed below; their statements are not independent measurements by this platform.
Official detailed company profileChecked 2026-10-11 · Manufacturing equipment, chambers and historical certificate claims; university wording differs from homepage.
Official contact pageChecked 2026-10-11 · Address checked; no website email found on the reviewed contact page.
Official YDF itemChecked 2026-10-11 · Actual product page, with a YDF-B technical image.
Original YDF-B technical and fixing sheetChecked 2026-10-11 · Inspected nozzle options, descending airflow entry, W–P notation and fixing drawing; throw test basis absent.
Official SHG itemChecked 2026-10-11 · Actual product page displaying an image-based technical schedule.
Original SHG construction and scheduleChecked 2026-10-11 · Inspected construction, supply/mode rows, 3 m noise and fixing sketch; no selected performance curve.
Official DKT/SDKT itemChecked 2026-10-11 · Several embedded technical images; not every legacy third-party-hosted image was established.
