Air washers
No, the purification mode of an air washer is natural, it is based on rotating discs in the air that catch dust from the air. The filtration is less fine than HEPA purifiers but it offers many advantages, such as not having to buy a filter again.
Regular cleaning is required depending on the model. In all cases, you must disassemble the elements where water flows, the discs, and immerse them in a solution of water and white vinegar. We recommend mixing white vinegar with 50 to 60% water. Leave it to act for at least 10 to 20 minutes and rinse with clean water. The discs can also, depending on the appliance, be put in the dishwasher.
Both devices work by evaporation. The air washer works with washable discs, while the evaporator works with filters (also called cartridges) that must be replaced regularly. The difference is that the air washer does not need consumables and its filtration quality is better.
An air washer is a 3-in-1 device that can humidify, purify the air and diffuse essential oils. An air purifier only has one main function, that of purifying the air, that is, of ridding it of pollutants.
Yes, the last settings are saved. If you turn the device off and on again, they will be reused.