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 other aspects to consider.
Different types of air purifiers might have divergent abilities; some are engineered for 24/7 operation, while others might need occasional breaks.
Secondly, the quality 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 compelling.
Thirdly, consider the energy efficiency of your unit. Although air purifiers don't consume much energy, running one all day will certainly add up on your electricity bill.
Another consideration is the noise made by the purifier. Not all units are hushed, and having them run all the time can disturb rest or sleep.
To website 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.