"These blowers are not recommended for use with any type of speed control devices."
From the crappy manual that bundles shaded pole, permanent split cap, dc and 3 phase motors in less than 4 pages.
Is that "lawyer" speak for it will work but we're not responsible? I could see that single speed a/c motors being a challenge to control but a d/c motor?
So I jumped the gun and ordered this fan https://www.grainger.com/Grainger/DAYTON-DC-Blower-3HMJ1 and I probably should have vetted this out first before buying it but shouldn't a PWM controller an acceptable way to control it? The data sheet is quite lacking