BEST HEPA AIR PURIFIER. 

1. Coway Airmega 250S Air Purifier

Suitable for large rooms, compatible with alexa,and has a sleep mode too.

2. IQAir Atem Desk Personal Air Purifier

Best portable purifier in the market. 

3. Oransi Max Air Purifier.

It has a very powerful and efficient motor 

4. PhoneSoap AirSoap

It's high-energy plasma field that traps and ionize the air particles that flow through it.

5. Samsung Bespoke Cube

Best pick for an effective and gentle clean 

6. Blueair Blue Pure 211+

Declared “best HEPA air purifier” by many top websites.

7. BISSEL air320

It comes with a retro look and its filter is amazing.