Thanks Ron!

Thank you Hedi!

assuming you mean running a second fan inside the inlet box connected to the same motor, you would gain some static pressure and cfm at the cost of more power consumption, so a similar effect to just running the first fan faster. This is unlikely to be worth it due to manufacturing complications, but as far as I know secondary fans like that are more effective at lower air pressures, so maybe a system like that could be useful in high altitude situations where the cost might be justified.

Hi Robert, thanks so much for your feedback! We are glad it was a good resource for you.

Thanks so much!

Hi Nathan! Thanks for your comment and interest in some additional videos. We actually have a Fan Fundamentals video series that is in development which will cover topics such as fan types and arrangements. If you haven't already, be sure to subscribe to our channel to make sure you don't miss those videos when they are released!

Hi! To answer your question, there is never a “perfect” vacuum and this could have been stated as “sees very little to no air”. The pressure is near zero or a slight negative. Functionally this part of the wheel does little to no work.

HI! The difference between these two is really just semantics and is often related to the magnitude of the change. Please note that the grey area between the two can vary from person to person. Thanks!

Hello! Thanks for your comment. There are a couple of differences related to furnaces/swamp coolers vs. vacuum cleaner sound levels. Furnaces fans and swamp cooler fans are both low pressure, high flow devices (excluding the combustion air fan in gas/oil furnaces). This is ideal for forward curved wheel designs. Forward curved wheels are often used in home furnaces and swamp coolers because they have low tip speeds. Low tip speeds result in light wheel, shaft and structural support designs keeping fan and installation costs low. Vacuum cleaners are high pressure, low flow devices. As a resulting, they require fan wheels (modified backward inclined wheels with long, steep blades angles or radial wheel designs) with high tip speeds. The high tip speed results in high noise levels. In addition, space is an issue. As a result the fan wheel is very small in diameter resulting in decreased efficiency. If you have additional questions or would like to discuss this topic in more depth, feel free to reach out to us directly via our contact page on our website. www.nyb.com/contact-us/

Hi! Thanks so much for reaching out. The term backward inclined comes from the fact that the air across the blade surface deflects in the opposite direction of the rotation. This may seem counterintuitive, but it allows for the fan as a whole to generate static pressure more efficiently because part of the diffusion is done by this backward deflection rather than the fan casing. For this reason, BI fans generally have the highest efficiency and are best suited for medium flow and medium pressure applications. When referencing a BI wheel, the blade angle radially out from the hub will always be less than a 90 degree angle. Hopefully this is helpful. If you have further questions about this topic, please feel free to email us at [email protected]. Thanks!

Hi Torin! Thanks so much for your kind words. We are glad you found the video series interesting!

Hello! The vane inside the round duct shown in the video is a custom component. There are fabricators who manufacture guide vanes, most of these are designed for rectangular ductwork and require installation.

Thank you @@NewYorkBlowerCompany ! For this fabrication, do you recommend a single or double walled (e.g., hollow) turning vane?

@@princegustavious There is no one type fits all applications turning vane. Each application should be looked at in a case by case situation. Abrasion, moisture, duct shape, duct size, incoming flow conditions, etc. influences vane type, # of vanes and vane shape. Double walled works well in abrupt, rectangular ductwork however users may experience condensation inside the vane when used in high moisture applications. Single walled are often used in round, long radius elbows. Hopefully this is helpful! Thanks

Hello! Thanks so much for watching and reaching out with this question. Baseline pressure is the same as long as configurations do not change. For all of the inlet configuration videos, the base line pressure is based on a fan with an open inlet, rectangular to round transition leading from the fan into a straight run of ductwork before heading into a damper with a preset position. Any changes to this configuration would establish a new baseline. For example, if the damper position changes, a new baseline is established. If the straight run of ductwork is removed, a new baseline is established.

@@NewYorkBlowerCompany i am wondering how many pressure do I need in order to have magnehelic to measure the standard pressure of in line pipe of my coffee roaster

@@aifrisyad7491 In order to better understand your question, can you clarify what you are trying to measure/accomplish? Are you looking for velocity pressure in order to calculate flow? Or are you looking for static pressure to calculate pressure drop? If Static Pressure (SP), one point should be good enough. If velocity pressure, it depends on the amount of straight duct available as well as how accurate the reading needs to be. Note that both readings are most accurate when taken in a straight run of ductwork (non-turbulent flow). Resources in include nyb’s Engineering Letter 7 - Field Testing of Fan Systems (www.nyb.com), AMCA’s publication 203-90 - Field Performance Measurement of Fan Systems, and AMCA's publication 201 - Fans and Systems. (www.amca.org)

Thank you! We are happy you enjoyed the video.

Thank you so much for your comment! We are glad you found the video helpful! And thank you for the topic suggestion, we will add this to our list for future content. For more in depth technical questions, you can reach out to nyb directly via our website contact page: www.nyb.com/contact-us/

Thanks so much for your kind words!

Thanks for watching! If needed, nyb can engineer a system utilizing multiple fans in series (typically 2) mounted on a skid to achieve pressures beyond 200” wg (7 psi or 50 Kpa).

Thank you for watching! We really appreciate the feedback.

Thanks so much for watching!

Thank you so much for your feedback! We are happy you found it valuable!

Thank you very much for the kind words! We are glad you found this helpful.

Hey Kevin! Changing the number of gores in the elbow and increasing the radius of the elbow will improve the flow (AMCA Publication 201 is an excellent resource). Regarding changing the duct diameter, this can create issues resulting in additional system losses and turbulence if the expansion/contractions are too abrupt. Most design organization (Industrial Ventilation Manual/ACGIH) recommend a max. transition angle of 15 deg. (7-1/2 deg. per side). This can result in long transitions.

Thank you very much for watching and for your feedback!

Thanks Curt! We appreciate you!

Thank you! We appreciate you watching!

Thank you very much!

Good Question! In this instance motor amp draw does not change from open discharge to position A discharge to position B discharge when operating at the same rpm. This is because a new fan curve is created and the point of operation on each new curve result in a similar energy consumption (not always the case as sometimes a “B” position discharge may result in a slight reduction in energy consumption). The real increase occurs when the fan’s speed needs to increase to overcome the loss in performance. Fan speed would need to increase approximately 10% to correct for the decrease in flow and energy consumption would increase approximately 40%.

Thanks Danielle! We appreciate you watching

Thanks so much Gary!

Thank you very much! We appreciate the feedback and are glad you found the video helpful.

Hey Jeremiah! Since we are measuring velocity pressure (VP) and the ductwork is 8” in diameter, cfm increases from approximately 1000 cfm to 1170 cfm.

Thanks for your feedback! We appreciate you watching and are glad this was helpful!

Thanks so much! We are glad you enjoyed the video

Our pleasure, Kevin. We appreciate the feedback!

Great to hear, John! Thanks for watching!