An air purifier can significantly enrich the air quality in your home, but many question the safety and efficiency running air purifier 24/7 of having it operate 24/7.
In general, it is safe to leave your air purifier running all day, but there are other aspects to look into.
Different types of air purifiers might have divergent abilities; some are crafted for 24/7 operation, while others might need occasional breaks.
Secondly, the condition of your indoor air should be considered. If you live in an area with high pollution levels or have a member in your household with allergies, a continuous operation could be necessary.
Energy efficiency is also a factor to consider. Although air purifiers are not big energy hogs, leaving one on continuously will increase your electricity bill.
Another point is the noise generated by the purifier. Some models can be quite boisterous, and it could be disruptive if operated all the time.
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.