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Hi, this is a good question. Although the xflow impellers are radial in nature, the airflow through a cross flow is straight through. As such it could be considered axial. However the "off" air flow direction is perpendicular to the impeller shaft and therefore technically the direction is radial. The difference being in xflow fans is the air intake is also perpendicular to the impeller shaft. I trust this helps. Simon

@@SimonBradwell Thanks to reply but unable to understand. When the profile of the vanes are same. Centrifugal force is the cause of suction. Centrifugal force is used to expel the things. Suction side is same as exit of air. Then why the suction occurs? When inlet and outlet is of same nature? Why not air is exited at inlet of this fan?

@@EAR.Pakistan good points - why does suction occur! Indeed! This is due to the design of the housing. Negative pressure is created inside the wheel and this is enough to create flow through the wheel in a laminar manner. This behaviour is only seen in these fans.

Hi @harvoormotors3050, apologies for the late reply. So that we can help you most effectively, can you please send an email to auenquiries@au.ebmpapst.com.

Thank you. We are too! best wishes for 2024.

Hi Bruin, thanks for your comments. Yes, these fans are typical for domestic gas fore places to provide hot air into your room. They are chosen because of their width and because of their low noise. Speed control can however affect this noise and typically a tapped motor is best i.e. a motor that has wires out at three different windings which then gives three separate speeds. Voltage transformers should not provide excessive noise, but I would suggest that other technology is being used as voltage transformers may be expensive for this application. The manufacture may be changing voltage by wave chopping that may cause mechanical vibrations in the motor and drive systems... I would suggest either using EC motor products (very low noise speed control) or products with tapped windings as above. Always happy to help! Please let us know if we can help further.

⁠​⁠@@SimonBradwell Thanks for the quick reply! The transformer isn’t very loud by itself, but it sits between two iron panels of stove, that act as a sound board and amplify the hum. I do have three wires with variable speed, the lowest speed is still noticeable. I suppose the shape of the blades could be modified to reduce noise and optimize efficiency (as toroidal fans have done) If you know any replacement parts I could buy, please recommend! This is what my fan says: QLK45/2400A39-2524LH-31 tu 115V-60Hz 30W Ins.Class H 5544255160 ebi FA 2510017981 Serbia(S) 11/22

Hi Samir, this is an EC fan and does not need a capacitor. A wiring diagram can be found in our “this fan” catalogue that can be downloaded from our website. Good to hear from you! We are happy to help.

@@SimonBradwell thank you 😃

Hi, impeller designs that give performance data between these two types are called mixed flow and the impeller blade designs and take off angles are defined within standards - ISO 12759 I think, but not sure off the top of my head….cheers

@@SimonBradwell: But it sounds like FC-cent. fans with big blades and BC-cent. fans with small blades don't really exist in the market, so I was wondering what the general reasoning behind that is. Would you be able to describe that generally?

Hi, I am not sure where in the world you live but this has already happened through Europe and changes are now happening in APAC and US.

​@@SimonBradwell: I live in the USA. But vacuum cleaners have been using this backward-curved style for ages, so it's not as if this were a new style of blade that was just barely developed. However, vacuum cleaners are NOISY! So when in a volute, is that the reason BCC fans aren't used more often? I mean... swamp coolers and furnaces are still using FCC fans all the time. What supposed advantage do they have?

Hi, same same as comments on other video. The other video is the new design and I will be making some more videos on the new generations of product shortly.

@@SimonBradwell: Right, but my point was just to try to help you be aware not to say "also..." and then "...as well" to refer to the same item or action, etc., since those two things mean about the same.

Hi, thanks for your questions. I'll answer them all here. Typically these fans are used in HVAC running 24/7 and provide great static pressure capabilities than forward curve fans. They are also non overloading which means the power does not spike at low pressures and overload the motor as happens with forward curve fans. Typically the static efficiency of these fans are also 30-50% better. Regarding guarding all fans should be guarded to EN13857 and this is the responsibility of the equipment manufacturer. Often guards as well as interlocks are used. I hope this helps with your inquiries. Thanks.

Thanks for your reply, @@SimonBradwell, with the few things that it did answer. But did it go over anything about how much these do or don't sound like vacuum cleaners because of their shape as opposed to the other style? And did it go over why you did not show the inlets or run them here? And did it go over the type of encasement these are used in even though you say they're not really in a housing? Also, why would these systems be used 24/7 even in places where a building isn't even being used for many hours of the day and night? Why not have a period where it's completely shut down until a little catch-up period before business the next day?

Hi, EC backward curve/plug fans are great for dust collection. It is important to pay attention to static pressure requirements as well as any particulate erosion of the fan. I hope this helps. Thanks for your question!

Hi, these are designed for low noise as well as with design elements that remove blade passing frequencies in non optimal installations. Best wishes, Simon

Hi Srinivas, of course we can help. Please can you email sales@au.ebmpapst.com and mark your request for my attention. Thanks, Simon

Cảm ơn bạn đã bình luận của bạn. Chúng tôi cố gắng đảm bảo rằng tất cả các sản phẩm của chúng tôi đều phù hợp với mục đích sử dụng.

Hi, please contact sales@ebmpoapst.com.au and we will endeavor to help.

Hi Steven, q1) - the fans would still run and move air in centrifugal direction but with much lower effectiveness. I suggest not doing it. q2) typically normal fans will fail due to water ingress and short circuit. We do produce products for high moisture applications. Please email sales@ebmpapst.com.au if we can help with this or contact your local agent as shown at www.ebmpapst.com. Cheers Steven. Simon

Hi Papi, you are right. The closest to this that we have here is our videos in EC Upgrades or retrofit. These typically show data of before and after and most, but not all videos have the relevant technical data. The technical info on our fans are available on our website and all the performance shown is test data which is tested on a standard, accredited rig. This performance data should enable people to make initial selections. We are happy to help with further support as you need. Please contact us to do this. Thanks Papi.

Hi, absolutely yes. We have a range of cooling tower fans both axial and centrifugal for exactly that application. Best regards. Please see our websites.

Hi, the forward curve is a d3g146 series and the backward curve is an r2e190 series. I cant remember the exact part numbers sorry. Please message me if I can help with further details on your project. Best regards. S

Hi VG, no problem. Please send an email to sales@au.ebmpapst.com marked for Simon Bradwell and I will get it orgnaised. Thanks, Simon

Hi Alam, we are happy to help. Which product? Typically there are 4 wires: earth is yellow/green and red/white and blue are the other three phases. These have to be wired according to the wiring diagram which should be with the product. We can provide this if you mail sales@ebmpapst.com.au. The product should be wired correctly otherwise the fan will spin incorrectly. Thanks Alam.

Hi Sunny, the direction of rotation depends on the manufacturer. Air is taken into the "eye" of the impeller, goes over the motor and passes out of all sections of the rotating impeller at right angles to the direction of the incoming air. To tell the direction of rotation; when the blade rotates, the air passes through the blades such that the air is pushed out by the external facing surface of the blade. Does this help? Thanks, Simon

Hello Tinh, unfortunately we do not have the original footage and can't UPGRADE (!). If you have any questions, please ask.

Thank you for your feedback Quang. What improvements should we make? What information do you need? Thank you

Hi Niranjan, by EC we mean "Electrical Commutated" or sometimes referred to "brushless". Thanks for asking.

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Hi, it's true. EC products are more expensive that traditional motor and impeller combinations. In addition however they have an integrated speed controller and their life time costs will be much lower. Please contact us at sales@au.ebmpapst.com and we can help with some more details. Thank you for commenting. Simon

Hi, the static performance is much lower. Racks and electronics systems have increased in component density requiring higher back pressure. Our new fans for these applications are typically higher flow and higher static. Here is some info: www.ebmpapst.com/au/en/industries/ict-electronics-industry.html. Thanks for your question. Simon

Hi Edmund, please send an email to sales@ebmpapst.com.au marked for me and we will provide wiring details. Thanks for contacting us. Simon

Hi, many different motor types are available for this product group. Single phase 230V, 110V; DC 12 and 24V and EC single phase. We can advise as to the best for the application. Please contact us at sales@ebmpapst.com.au if we can help.

Hi Andrew, there is nothing like this range of products. Like all fans, a negative /positive pressure imbalance is needed and this is achieved with the design of the inlet and the outlet. A vortex is created within the barrel that allows the flow of air. Cheers, Simon

Hi Mahesh, the driving 0-10V has to have a voltage applied. This can be achieved by using voltage output from the product. Please send me an email sales@ebmpapst.com.au and marked for my attention and we will provide the details required. Best wishes.

Hi Mahesh, sorry just seen this. as above please send an email to sales@ebmpapst.com.au marked for me and we will organise a wiring diagram. Thanks, Simon

Plz sent your contact no

Thank you for your kind comments. Our fans are manufactured to detailed tolerance with 100% end of line checking. We try to ensure reliability and longevity where ever we can. Best wishes.

Hi, repairs on the electronics and bearings can be done fairly easily depending upon the product. We would need to help you though. Please contact us if we can: sales@ebmpapst.com.au and mark it for my attention. Thanks, Simon

@@SimonBradwell Thank you.