I've got a Levoit one in my study.
Absolutely cracking. Helps with dust and my havfever. Thoroughly recommend it
This is the one I have;
Levoit Air Purifier for Home, Quiet H13 HEPA Filter Removes 99.97% of Pollen, Allergy Particles, Dust, Smoke, Portable Air Cleaner for Bedroom with 3 Speeds, Night Light, Filter Change Reminder [Energy Class A++]
£73.99