An air purifier can substantially enrich the air quality in your home, but many question the safety and efficiency of having it operate 24/7.
In general, it is fine to leave your air purifier running all day, but there are check here other aspects to look into.
Different types of air purifiers might have divergent abilities; some are engineered for 24/7 operation, while others might need occasional breaks.
The air quality in your home is another factor. For homes with high pollution or residents with allergies, it may be optimal to have the air purifier run 24/7.
Energy efficiency is also a factor to consider. Although air purifiers are not big energy hogs, leaving one on continuously will up your electricity bill.
Lastly, think about the noise level of the device. Some can be rather noisy, and running them continuously may be uncomfortable, especially at night.
To sum it up, while it's usually okay to run an air purifier all day long, one should consider the type of purifier, the indoor air quality, its energy consumption, and the noise level before deciding.