Sihe DF-E double-inlet air-conditioning fans
A centrifugal HVAC component with a size/speed/motor schedule; distinguish total pressure, drive scope and the catalogue's air-stream restrictions.
From Sihe HVAC and ventilation fan manufacturing
Individual product research · HVACDeck Editorial · Sources checked 2026-10-11
Specify the actual DF-E configuration inside the air-handling unit
Sihe identifies DF-E as a double-inlet centrifugal air-conditioning fan, intended for air-conditioning assemblies, air curtains and indoor ventilation. The original sheet illustrates an exposed belt/pulley arrangement and gives sizes 2.5 through 8 with speed, motor, airflow, total-pressure and noise columns. This is a fan component catalogue, not a complete air-handling-unit specification with known coils, filters, casing or controls.
The sheet says the medium may be air or other non-self-igniting gases harmless to people, excludes particulate matter, and also prints a dust-content limit of 150 mg/m³. It does not establish suitability for a corrosive, explosive, high-temperature or process-dust stream. Use its table to choose a candidate size/speed and ask the manufacturer for the selected curve, current motor/drive configuration and installation drawing. A range row is not proof that maximum airflow and maximum pressure occur together.
Published parameters and their scope
This is an equipment family; its range does not identify one orderable configuration.
- Family designation
- DF-E
Swipe the table, or focus it and use arrow keys, to read the conditions and sources.
| 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 |
Selection and application review
Keep fan speed, motor poles and pressure together
The size 2.5 schedules change substantially: the 1,000 r/min row lists a 0.55 kW four-pole motor and 280–260 Pa total pressure, while 1,600 r/min uses a 1.5 kW six-pole motor and 720–695 Pa. These are separate offered configurations. Fan speed is its own table column; motor poles do not give the impeller speed when a transmission is used. Confirm the pulley ratio, actual motor speed and supplied drive.
The airflow and total-pressure ranges should remain attached to their row. Request a curve and mark the chosen point, including density and test arrangement. Do not use 3,650 m³/h with 280 Pa as a guaranteed maximum pair, or compare the table's total pressure directly with another fan's static pressure without a matching definition.
Integrate both inlets and the drive into the cabinet
The sheet shows a double-inlet fan component with a belt/pulley assembly. Supply both-side inlet clearances, the outlet transition and the position of coils, filters or panels around the wheel. Ask for the exact casing/motor/drive outline, support points, belt guard and removal route. The offered fan must fit after access panels and other equipment have been included, not merely within an empty cabinet.
Close responsibility for belts, pulleys, guards, supports, isolation, controller and wiring. A supplier photograph does not establish the delivered package or prove that a particular drive is safe at every listed speed. Have the manufacturer identify the supported operating range and maintenance access for the selected configuration.
Show the internal arrangement
Include both inlet spaces, filter/coil locations, outlet transition and service-side restrictions.
Close the drive package
Identify motor, pulley ratio, belt and guards, support loads and the agreed fan speed.
Approve a controlled outline
Match the selected configuration and drawing revision to the actual cabinet and removal route.
Clarify gas and dust suitability before adopting the family
The catalogue permits air and other harmless, non-self-igniting gases, excludes particulate matter and gives a dust-content limit of 150 mg/m³. The wording needs clarification for any stream that includes solids: distinguish fine dust from particles, identify concentration and describe abrasiveness or deposits. The page does not establish a dust-collection or hazardous-atmosphere rating.
Supply air temperature, ambient conditions, humidity and contaminants. Ask for materials, coating, bearing/motor protection and operating restrictions relevant to that stream. Do not borrow a fire, corrosion or explosion designation from another Sihe catalogue category, and do not interpret the illustrated ordinary drive as an approval for a classified area.
A noise number needs the measurement basis
The size 2.5/1,000 r/min row prints 65 dB(A), but the sheet does not identify a measurement distance, sound-pressure versus sound-power basis or installed cabinet. A quiet-product description and that isolated number do not guarantee a room or property-boundary result. Request acoustic data for the selected point and the complete assembly being quoted.
The air-handling-unit casing, inlet/outlet paths and transmission may affect the installed result. Compare offers only after matching operating point, test arrangement and the attenuation included. Neither the factory's two published aerodynamic chambers nor a company quality-system claim authenticates an order-specific acoustic result.
Return a selection and inspection package
A usable offer should identify size, impeller speed, motor/supply, transmission, marked curve, total-pressure definition, outline and accessory scope. Ask for an inspection plan covering identification, dimensions, balancing/running records where specified and actual operating measurements. Have the supplier clarify the gas/dust wording and any current replacements for catalogue motor codes.
For installed acceptance, agree airflow, pressure measurement positions, rotational speed, electrical input and noise conditions. Motor rated power is not measured input consumption. No price, stock, lead time, selected-model certification or warranty has been verified for DF-E in this review. The next step is an approved configuration and evidence package, rather than procurement by nominal size alone.
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 DF-E itemChecked 2026-10-11 · Original product and technical sheet displayed as an image.
- Original DF-E technical imageChecked 2026-10-11 · Actually inspected both table halves, gas restrictions and component illustration.
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.
Continue the selection
Other equipment from this manufacturer
Sihe YDF-B induction ventilation fans