The published A string
Two unqualified figures; neither units nor speed/model meaning is clear. Obtain the A selection sheet.
EQUIPMENT / EQUIPMENT FAMILY
Chunfeng YDF induction fans · nozzle layout and ventilation design
Manually adjustable nozzle boxes for indoor air movement: resolve the A/B selection data, then coordinate jet paths with actual supply, extract and maintenance access.
From Jingjiang Chunfeng Air Conditioning Equipment Co., Ltd.
Individual product research · HVACDeck Editorial · Sources checked 2026-10-11
Induced circulation is not a substitute for a documented ventilation duty
Chunfeng’s actual YDF item describes YDF-A and YDF-B induction fans with manually multidirectional-adjustable nozzles. Two original images show box assemblies with three visible outlet nozzles and a collage of alternative forms. They contain no readable numerical table or A/B labels identifying which pictured configuration matches each form.
The published airflow strings are incomplete: A has “3600 6000” and B “630–850, 985–1350”, without units or a clear speed/configuration mapping. The diameter line contains an unclear character before 250 and 280. These are not converted into rated m³/h or millimetre model data here. A selected technical sheet is needed before the physical layout or equipment count can be justified.
Published parameters and their scope
This is an equipment family; its range does not identify one orderable configuration.
- Family designation
- YDF-A / YDF-B
Swipe the table, or focus it and use arrow keys, to read the conditions and sources.
| Parameter | Published value | Conditions and evidence |
|---|---|---|
| Forms named | YDF-A and YDF-B | Manufacturer text identifies both; exact designation and configuration schedule missing. Source |
| Nozzle feature | Manual multidirectional adjustment | Supplier description, supported by outlet photographs; no quantified angle, throw or induced-flow ratio. Source |
| Published airflow strings | A: 3600 6000; B: 630–850 / 985–1350 | Units and operating mapping absent. Not treated as numerical ratings. Source |
| Original image evidence | Box/nozzle assemblies and alternative forms | Actual two images viewed; no model labels or rating schedule recovered. Source |
| Intended spaces named | Parking garages, halls, pools, airports, warehouses, supermarkets and workshops | Application categories, not verified project references or sizing rules. Source |
Selection and application review
Resolve the missing units before comparing A and B
Ask the supplier for the full selected designation, delivered fan airflow and pressure, speed, motor/input, supply voltage and noise basis. Require units and test conditions for each figure and an explanation of what the two A values and two B ranges describe. Do not assign one number to high speed and another to low speed without documentation.
Confirm whether each airflow quantity is the fan’s primary flow or an induced-room-air claim. The diameter line also needs an unambiguous impeller/connection drawing. No model performance is inferred from a similarly named YDF product sold by a different supplier.
The published B strings
Two unqualified ranges; do not combine them or treat them as one rated envelope. Obtain the B selection sheet.
The configuration images
Several physical forms are pictured without A/B assignment. Match the actual offered nozzle box to a labelled drawing.
Place the nozzles along a defined air path
Manual directional adjustment makes outlet orientation part of the installation design. For the actual space, show supply/make-up and extract openings, beams, partitions, plant, ramps and permitted fan mounting positions. Have the designer and supplier establish the intended jet paths and how they interact with obstacles and neighbouring fans.
Require throw/velocity information with its measurement and terminal-velocity basis, nozzle number/diameter and adjustment limits for the selected assembly. The photos show outlets, but no verified coverage area. Do not multiply an assumed throw or induced-air ratio by fan quantity to create a building design. Maintain routes for occupants and service personnel and agree which nozzle settings will be recorded at commissioning.
Separate air movement from removal of heat or contaminants
An induction fan can move air within a space, while the building’s supply and extract arrangement determines the intended replacement/removal path. State the actual design goal: distribute supply air, move stagnant air toward extraction, address a thermal condition or support a specified ventilation strategy. Required outdoor air and extract duties need their own design basis.
For parking applications, coordinate the control and sensing approach with the responsible designer. A photograph and garage application label do not demonstrate a contaminant concentration, ventilation rate or energy saving. For pools, industrial spaces or kitchens, confirm medium, moisture/corrosion and cleaning suitability for the quoted materials and motor; do not assume one indoor-use list proves suitability for every atmosphere.
Keep everyday ventilation and fire-duty evidence distinct
The YDF page supplies no temperature/duration report or exact fire-duty approval. The company’s broader catalogue includes fire-related equipment, but that does not automatically establish this nozzle assembly’s suitability for emergency smoke control. A proposed fire-related use requires a documented design and evidence for the actual model/configuration.
Obtain the selected fan, motor, nozzle and control information together with applicable original reports and current status where required. Identify normal/emergency sequences and interfaces to the building system. The absence of those documents in this publication is an unresolved selection state, not proof the company has no qualifying product.
Presently supported
Named A/B forms, manual nozzle adjustment, intended-use categories and physical box/nozzle images.
Read the sourceNot established here
Selected airflow/pressure, throw, induced-flow ratio, whole-space ventilation result, acoustic guarantee or model-specific smoke duty.
Draw installation and service access before ordering
Obtain the total envelope, connection faces, mounting points, weight and nozzle-adjustment clearance. Confirm access to motor/impeller, terminal box and any removable panels. The webpage’s “easy installation and maintenance” wording does not give an actual access dimension or suspension design.
Agree who supplies supports, electrical protection, isolation, controls and any vibration/noise treatment. Where a design includes accessories from the wider supplier catalogue, list them explicitly; silencers or dampers shown elsewhere are not automatically included in a YDF quote. Review the delivered assembly and its manual rather than assume the photograph defines the final wiring or construction.
Verify the selected fan and the room strategy separately
A useful handover records both equipment operation and the agreed space-level checks. It should not treat nozzle adjustment alone as proof that the ventilation objective has been met. No measured energy saving, price, warranty or service response is established by the publication.
Selection and layout
Resolve A/B model data and units; approve the fan duty, nozzle arrangement, mounting/access and intended supply-to-extract paths.
Equipment commissioning
Verify direction, electrical input, operation, noise/vibration checks and actual nozzle positions under defined conditions; retain the manufacturer’s manual.
Space-level acceptance
Use the designer’s agreed airflow/velocity or relevant environmental verification method; record operating modes, conditions and adjustments, with maintenance responsibility.
Sources and review scope
Compiled by HVACDeck Editorial. Source review identifies what the publication states; it is not an independent performance test or certification.
- Official YDF induction-fan itemChecked 2026-10-11 · Actual complete current body and both original product images inspected. Incomplete units/diameter string retained as unresolved, no model table recovered.
- Original nozzle-box collageChecked 2026-10-11 · Actual image viewed: multiple box/nozzle forms, without A/B labels or numerical ratings.
Editorial method and corrections · Report a detail with this page URL
Turn the evidence into an enquiry
Send the manufacturer your required duty, installation conditions and the unresolved items identified in this brief.