For us, however, we now hear two AC units starting and stopping independently, causing twice as often fan start noise.
A few years ago I replaced my old HVAC system. the new one has a soft start on the compressor, the compressor fan and the blower inside. You barely hear it. The old one sounded like someone kicked the compressor housing every time it fired up. Not even sure they sell that style anymore, unless you are buying a super cheap one. The new one wasn't cheap but my electricity bill dropped by about 2/3's in the summer compared to having the old one.
I have thought about buying a 1/4 hp 230 volt soft starter for my outdoor unit’s condenser cooling fan.
I learned a few years ago that the 5 bladed Dodge pickup’s radiator fan’s uneven blade spacing was for noise reduction.
If my fuzzy memory is right that odd bladed fan is 28% quieter than the previous fan design.
My outdoor unit has a 4 bladed fan inside a shroud with just bent metal blades instead of “airplane wing” blades.
I wish I could buy a quieter fan design, that has the Amana hub design.
I am 99% sure a few dB quieter fan could be designed.
Your tax $ paid for this quiet AC fan design
https://stars.library.ucf.edu/cgi/v...r=1&article=1219&context=patentsScroll down and look at Fig. 17 and Fig. 18 for “funky” fan blades and spacing.
I would like to try one of these 5 blade fans with a steeper pitch at a lower speed
https://www.ebay.com/itm/60-5611-01...6?hash=item25cae98218:g:YMoAAOSw8G1di8dbMy 4 blade is 27 pitch
so the above 5 blade with 33 pitch
would probably overload the existing OEM motor
