What is a HEPA filter made of?

HEPA filters are usually made of a PTFE or glass-fibre material, arranged as a mat of randomly arranged strands. Depending on the size of the particle, it is trapped by the HEPA filter in one of three ways. Diffusion – Very smooth particles can move randomly when suspended in airflow.

Is a HEPA filter safe to breathe?

However, the latest scientific studies have shown HEPA filters are safe and found no evidence of harm. Possible shedding fibers have made some people afraid of HEPA filters and question “Are HEPA filters safe?” There's a controversy over whether fiberglass particles can cause lung disease and cause cancer.

Is it healthy to sleep with an air purifier?

Yes, you should sleep with an air purifier on for better respiratory health, allergy relief, and improved sleep quality, as it removes irritants like dust, pollen, and smoke while potentially providing soothing white noise, with many models designed for continuous, quiet overnight operation. Running it continuously ensures clean air isn't "caught up on" at bedtime, offering consistent benefits for your body's nightly restorative processes.