My mom's lungs are very bad and I'd like to get a medical standard air purifier. Can you recommend one?

Choose Oslo air purifier ah, the Norwegian capital of Oslo means "God's valley, the forest clearing" We themselves are suppliers, specializing in air purifiers, research and development of air-cleaning products, car, home have, welcome to the "Oslo smart appliances! "Buy your favorite air purifier Oh ~ recommended that you use H13 HEPA filter Oh. HEPA net level higher, can filter the particles of the smaller diameter, the better the filtration effect. At present, the ordinary air purifier on the market is H10H9 level HEPA net, high-end air purifier is generally used in the H12 level HEPA net, a very small number of high-end air purifier using H13 level HEPA net, H13 level HEPA net is the top imported medical grade Cleansing Soft HEPA filter, filtering effect is the best. The best filtering effect. Therefore, at least you should choose the air purifier with HEPA mesh level above H12, and try to choose the air purifier with H13 level HEPA mesh if you have the condition.