This looks just like a large PC fan. TBH these motorized impellers were originally designed for the IT industry for cooling high power density electronics but I suppose they have found their uses in HVAC recently. They're supposed to be the most efficient type of fan blade, even more so than forward curved squirrel cage blowers, but I've always found that they rotate too quickly for there to be a noise advantage in all cases.
This style of fan is found in commercial HVAC all the way up to those HUGE box car units. Sometimes having an array of the fans. The reverse incline blades are steel that is all welded together at that caliber, however. There were some huge units I was working on almost 10 years ago that were configured wrong by controls and the unit was producing something like 6" of static! It was popping the unit apart at the seems! Here's some medium sized ones (VFD + AC motor reverse incline blades) ---> czcams.com/video/Lt0v6wUrhsg/video.htmlsi=CLfpnL5E0Ydp7XvJ&t=195 Here is an AAON unit that uses them but these are VFD AC motors czcams.com/video/oCcBD40nCuM/video.html Somewhere I have a video of those large ones. They had like 20 or 30 HP motors if I am not mistaken.
@@jman0870 Nothing wrong with that, according to Wikipedia, "driven rotor used to increase the pressure and flow of a fluid". Air or any other liquid can be a fluid.
Only Carrier would sell a $50 assembly of hundreds and hundreds of dollars. One of the tech support guys at a local distributor and I got into some casual conversation about Carrier one day. Turns out he was a service manager for Carrier once upon a time. He was pulled into a meeting about profit margins and other corporate bullshit. Carrier proceeded to brag about their record low failure rate and record high profits on aftermarket parts. He questioned the model in the meeting and was instantly shut down because he didn’t “understand business.” He replied “oh I understand business. I also understand r**e and sodomy too.” Needless to say, he doesn’t work for Carrier anymore. This dude remembers Carrier Multi-Zones. I had the pleasure of working on one of those abominations once. It’s literally why we hit it off and he went off on that tangent. Carrier is a piece of shit company and I’ll gladly take a Goodman before I ever take a Carrier ever again. 🤷♂️
i see this as your outdoor wind turbine spinner in my vison
Well, I scrapped that fan. But I did keep one in tact
This looks just like a large PC fan. TBH these motorized impellers were originally designed for the IT industry for cooling high power density electronics but I suppose they have found their uses in HVAC recently. They're supposed to be the most efficient type of fan blade, even more so than forward curved squirrel cage blowers, but I've always found that they rotate too quickly for there to be a noise advantage in all cases.
This style of fan is found in commercial HVAC all the way up to those HUGE box car units. Sometimes having an array of the fans. The reverse incline blades are steel that is all welded together at that caliber, however.
There were some huge units I was working on almost 10 years ago that were configured wrong by controls and the unit was producing something like 6" of static! It was popping the unit apart at the seems!
Here's some medium sized ones (VFD + AC motor reverse incline blades) ---> czcams.com/video/Lt0v6wUrhsg/video.htmlsi=CLfpnL5E0Ydp7XvJ&t=195
Here is an AAON unit that uses them but these are VFD AC motors czcams.com/video/oCcBD40nCuM/video.html
Somewhere I have a video of those large ones. They had like 20 or 30 HP motors if I am not mistaken.
@@hackfreehvac I remember that video where you showed the large fans producing 6" of static. They are quite elegant beasts!
Did you just use impeller in a sentence about airflow? 🤣
@@jman0870 Nothing wrong with that, according to Wikipedia, "driven rotor used to increase the pressure and flow of a fluid". Air or any other liquid can be a fluid.
@@liminalsunset Wikipedia? 🙄
spindle looks kinda small
The unit was just a 12,000 BTU unit.
oh not to big a fan then engineers like to undersize things so they fail@@hackfreehvac
@@royamberg9177 Seems to be par for the course. Some manufacturers spec their supply fan motors at the 1.15 SF 💥💥
Only Carrier would sell a $50 assembly of hundreds and hundreds of dollars. One of the tech support guys at a local distributor and I got into some casual conversation about Carrier one day. Turns out he was a service manager for Carrier once upon a time. He was pulled into a meeting about profit margins and other corporate bullshit. Carrier proceeded to brag about their record low failure rate and record high profits on aftermarket parts. He questioned the model in the meeting and was instantly shut down because he didn’t “understand business.” He replied “oh I understand business. I also understand r**e and sodomy too.” Needless to say, he doesn’t work for Carrier anymore. This dude remembers Carrier Multi-Zones. I had the pleasure of working on one of those abominations once. It’s literally why we hit it off and he went off on that tangent. Carrier is a piece of shit company and I’ll gladly take a Goodman before I ever take a Carrier ever again. 🤷♂️