1 published equipment referenceLatest source review 2026-10-11
01 / COMPANY
What this manufacturer offers
Shaoxing Shangyu Dashun Ventilation Equipment Co., Ltd. uses the Shunfeng and Dashun ventilation brands. Its official introduction places the business in Shangyu, Shaoxing, and lists smoke-exhaust, centrifugal, mixed-flow, axial, roof and cabinet fans alongside dampers and silencers. The contact address identifies Majia Road in the Ludong industrial area of Baiguan Subdistrict.
The company describes CAD-based development, data-acquisition testing and management covering design, procurement, production, inspection, sales and after-sales service. These are published process statements, not a factory audit. The HTF product page is more useful for an initial technical discussion: its image catalogue explains several variants and includes tables of paired airflow and total-pressure points. Those images were read visually for this profile rather than treating the short page heading as the complete specification.
The selected equipment reference remains the HTF family, not a single chosen fan. The supplier’s separate certificate gallery includes an entry labelled HTF-I-16A. That specific label deserves a model-matched check; it cannot be extended automatically to every number and arrangement in the wider family.
Published trading brands
Shunfeng; Dashun ventilationBrands identified in the official company introduction. Source
HTF-I No. 3.5 catalogue example
6,122 m³/h at 205 Pa; 3,500 m³/h at 552 PaTwo different paired points in one manufacturer table. Neither pair is an order selection or a platform test result. Source
Same table’s drive entry
2,900 rpm; 1.1 kWPublished HTF-I No. 3.5 row in the visually read image catalogue. Do not apply to other fan numbers or variants. Source
Parameters and source limits · HTF-I / II / III / IV / D / W
Swipe the table, or focus it and use arrow keys, to read conditions and sources.
Manufacturer-published information · HTF-I / II / III / IV / D / W
Parameter
Published value
Conditions and evidence
I/II arrangement
Axial impeller · I single-speed / II two-speed
Definitions in the original explanation sheet; not transferable to another supplier’s HTFC codes. Source
III/IV arrangement
Mixed-flow impeller · III single-speed / IV two-speed
Separate performance and dimension schedules in the original catalogue. Source
HTF-I No.3.5 example
6,122 m³/h at 205 Pa total; 2,900 r/min; 1.1 kW
One paired recommended point and motor entry. Same size also lists 3,500 m³/h at 552 Pa; no mixing maxima. Source
HTF-II No.5 two-mode example
High: 9,824 m³/h at 510 Pa; low: 4,912 m³/h at 127 Pa
First recommended rows at 2,900/1,450 r/min; published installed motor entry 3/2.5 kW. Actual project selection still required. Source
HTF-I/II No.3.5 dimensional example
L 520 mm; D1 360 mm; D2 390 mm; D3 430 mm
Drawing references only, with flange-hole pattern explicitly advisory and ordinarily undrilled. Source
Original certificate identity
Z2024081814003216 · HTF-I-16A main type
Image names Shaoxing Shangyu Dashun; includes HTF-I-16B/C/D/E. Does not cover every catalogue variant. Source
Printed certificate dates
8 November 2024–7 November 2029
Original manufacturer-hosted certificate image read. Issuer website attempt timed out; current status not independently verified. Source
03 / PROJECT REVIEW
Dashun: choosing within the HTF smoke-exhaust catalogue
The catalogue actually explains I–IV
Unlike a family heading alone, the first catalogue image explains the impeller arrangement and speed distinction for I–IV. Its other labels have separate purposes: W is a roof arrangement, D is described as a low-pressure form, and X is a silenced form mentioned in the image text even though X is absent from the page heading. Keep that naming difference visible when requesting the current selection sheet. (Source 2.)
HTF-I and HTF-II: axial arrangement
The catalogue describes the normal-pressure group with an axial impeller, identifying I as single-speed and II as two-speed. Require the selected number and the applicable speed-specific duty points.
The catalogue describes the medium-pressure group with a mixed-flow impeller, identifying III as single-speed and IV as two-speed. These labels have their own stated meaning here; they should not be borrowed from another manufacturer’s HTFC classification.
The HTF-I performance table lists five recommended operating points per number. For No. 3.5, the image shows 6,122 m³/h paired with 205 Pa and 3,500 m³/h paired with 552 Pa. They are points on the same published selection table, not two independent maxima that can be combined into 6,122 m³/h at 552 Pa. The row gives 2,900 rpm and a 1.1 kW motor entry. (Source 2.)
The catalogue text says its selection tables use standard conditions, but the first image does not define the full density and ambient basis. It also describes a full-pressure tolerance at rated airflow. Those statements should travel with the supplier’s selected curve and its conditions; they do not convert the table into an independently witnessed test. Numerical sound and mass entries in the table likewise belong to the specified row, rather than the whole HTF range.
State a paired duty
Provide required airflow and total pressure together, plus the air condition and intended normal-ventilation or smoke-exhaust duty. Do not quote the two largest values found in separate catalogue cells.
Select the variant and number
Ask Dashun to return the complete designation, proposed speed or speeds, motor information and the marked operating point on the applicable curve.
Match the arrangement drawing
The source distinguishes horizontal and roof installation and mentions direct duct or wall mounting. Obtain the actual connection dimensions, support requirements and service clearances for the chosen arrangement.
Original HTF-I-16 certificate is readable; current issuer status remains separate
The original HTF catalogue states operation for more than 60 minutes at 300°C and separately 20 hours per run at 100°C, with a dated 1999 standard reference. These are supplier statements, not a full current high-temperature test report.
The actual HTF-I-16A original certificate was successfully read in the 11 October review. It names Shaoxing Shangyu Dashun Ventilation Equipment Co., Ltd., certificate Z2024081814003216, and lists HTF-I-16A as main type with HTF-I-16B/C/D/E. Printed issue and expiry are 8 November 2024 and 7 November 2029; it cites XF211-2009. The issuer-site attempt timed out, so current status has not been independently verified.
Original image evidence
Named company, certificate number, five HTF-I-16 suffixes and printed dates are readable in the actual document.
Match current issuer status and the full report to the offered model/configuration and required duty; do not extend this certificate to all I–IV/D/W/X catalogue forms.
Catalogue breadth is not corrosive-service suitability
The company lists glass-fibre-reinforced-plastic centrifugal, axial and roof fans as well as other ventilation equipment, and names chemical, pharmaceutical and food-processing industries among its applications. That breadth does not establish that the HTF smoke-exhaust unit uses the same materials or is suitable for corrosive, hygienic or explosive atmospheres. (Source 1.)
For those applications, identify the proposed fan’s actual casing and impeller material, the handled-air composition and any required protective design. Keep a smoke-exhaust enquiry separate from a request for an FRP process fan unless the supplier explicitly selects and documents a unit for both requirements. No independent company or current model-certification record was verified in the authoritative-source search for this manuscript. That remains a research gap, not a negative certification finding.
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.
HTF family and image catalogue — source 2Checked 2026-10-11 · All17 actual original catalogue images read on2026-10-11: performance and dimensions for I–IV/D, roof/silenced variants, wiring and maintenance. Supplier claims not independent tests.
Dashun official fire-certificate gallery — source 3Checked 2026-10-11 · Gallery and original HTF-I-16A certificate now fully readable; printed dates and covered suffixes transcribed, current issuer status unresolved.
Original HTF-I-16A certificateChecked 2026-10-11 · Actual complete image read: named holder, certificate number, A–E scope, XF211-2009 and printed 2024–2029 validity. Issuer status check timed out.
