Since this is one of the more active air purifier threads, guess I get a better chance in response if I wrote here.

I am looking for air purifier for the house, for better air quality because we have kids at home.

I was looking at Sharp Plasma Cluster because that's all I know but the electrical shop recommended me Panasonic. I love Panasonic goods but just not sure how they fare with air purifier products.

Then, spoken to some relative who recommended me Medklinn. Then colleague recommend to rent from Coway first.

I was told that a HEPA filter is not washable but need to be replace every 2 years (if you use 8 hours per day). Anyone know much does a HEPA filter cost?

Anyone can comment about these brands? Coway, Sharp, Panasonic, Medklinn?