The only fans I can find that are big enough to move air over two floors make more noise on their low setting than the Dyson's on its high setting. Then there's the issue that the fans would need to be connected to an app in order to power automatically as air quality drops.

(I don't have the Honeywell anymore as it was my ex's)

This conversation makes me want to buy a second purifier and simply stop purchasing filters for my Dyson. That way, it would continue to work as a space heater and fan but the air purifying would be done by a dedicated device.

Makes sense as by rule of thumb, no "jack of all trades" devices will ever be better than a dedicated device. Hindsight is 20/20.

It sounds like you need a ceiling fan. I have an ADU with a half loft and 26' ceiling over the other half. One decent fan really moves the air.

Sadly the second floor is a low and angled ceiling. We had installed a ceiling fan with an adapted mount but it wasn't long before one of us hit the fan while removing a shirt.

This sent the fan spinning at a weird angle and it hit the ceiling. This broke the wooden blades and sent them flying in all directions.

So floor fan it is now.

Ceiling fans are awesome. Especially when you operate them in reverse in the winter.

The Unix philosophy of air handling.