The fan has an auto-adjust feature that increases and decreases its purification progress, making for easy all-day operation.

Dyson fans cost several hundred dollars, so we were surprised to see the Dyson Pure Cool Tower TP4A at just $149.99.

This large and freestanding unit filters up to 1,076 square ... Ahh, Dyson. Everything Dyson makes is top-notch, including fans, hair curlers, blow dryers, and air purifiers, and that’s the ...