Ion purifiers do not have filters and, therefore, do not effectively remove particles, especially the smallest and most dangerous particles. Its performance is much worse compared to a HEPA filter, and the performance degrades as the plates get dirty. Negative ionizers are small devices that create a negative charge. This charge allows the HEPA filter to capture more particles.
Ion generators come in different shapes and are small in size, similar to that of a dental floss container. The main difference between air purifiers and ionizers is the way each device removes contaminants from the air. In the case of air purifiers, HEPA filters trap particles inside a filter, so it needs to be replaced regularly. Ionizers don't have filters because they emit electrically charged particles to remove contaminants from the air.
It's important to understand that this doesn't completely remove those particles from the environment. The noise level is another feature to consider when comparing HEPA air purifiers and ionic air purifiers. HEPA air purifiers are designed to circulate air in the room and remove contaminants, dust and allergens by trapping them in filters. Unlike ionic purifiers, HEPA purifiers always use a fan; a product cannot operate without it. Ionic air purifiers usually have no fan and are therefore quiet.
It is true that ionic air purifiers are capable of reducing the concentrations of small particles in the air. If you have asthma, allergies, or other respiratory conditions, a HEPA air purifier is more likely to relieve symptoms because it prevents particles from re-entering the air you breathe. Compared to an ionic air purifier and a HEPA air purifier, the ionic air purifier works similarly to a HEPA air purifier, but uses electrical charge plates to collect contaminants. Ionizers don't use filters at all, and ionic air purifiers have metal collection rods or plates that can be cleaned with a cloth.
For an ionizer to be effective, you must remove dust or vacuum frequently, as pets and people who walk around the room can cause particles to return to the air. An air purifier circulates air from a room to send it through the filter, which captures particles as small as 0.3 microns in size. As you've already learned, a HEPA air purifier can be more efficient at removing air contaminants because it actually traps particles within a physical filter. If the HEPA filter is clogged, the air purifier fan will not be able to move air around the room to clean it.
The main difference between an ionic air purifier and a HEPA air purifier is that electrostatic collector plates can be washed and reused as they become dirty. Ozone air purification is sold only as a commercial air purifier, as the state of California does not allow them to be sold to consumers. While ionic air purifiers cost less to operate in the long term, their performance is terrible compared to a HEPA air purifier. This makes ionic air purifiers a more cost-effective solution than a HEPA air purifier; however, they are not as efficient as a HEPA filter when it comes to total square foot coverage.