Guys,
I recently bought the Sharp model 28W which on Lazada costs 360odd.

Got it within 3 days. Was used at full power to clean my master bedroom which is within its maximum coverage. Anyway, after about 2 hours of max power, you can actually smell that the air within the room is totally different from the rest of the house.

My wife commented that it smelled like waterfall/besides a spring/mountain air; I.e. Extremely fresh air.

The only downside is, it's about 60db when at max. At min, it's a quiet whisper. Middle setting is a bit noisy and yesterday night, somehow, the haze smell came into our room even with everything closed, I crank up the Sharp from min to middle, and within 15mins(?), the smell went away...

So, for about 330 (buy on Monday as there is a MasterCard promo with additional 10% off), I think it's an acceptable buy.

Pls check my overly simplistic review on pge 15...