{"niche":"哪些HEPA空气净化器品牌在客户评价和可靠性方面最好？","description":"Which hepa air purifier brands have the best customer reviews and reliability?","products":[{"brand":"AirDoctor","model":"AD5500","price_gbp":748.44,"origin_country":null,"specs":{"filter_type":"Pre-filter, UltraHEPA, Carbon/VOC","noise_level_db":"65.1","coverage_area_sqft":"1043","energy_consumption_watts":null,"filter_replacement_interval":"6-12 months","clean_air_delivery_rate_cadr":"556","maximum_particle_size_capture":"0.003 microns"},"confidence_score":null,"summary":"The AirDoctor AD5500 (AirDoctor 5500) is a 3-stage UltraHEPA air purifier for extra-large rooms and open-concept spaces, targeting particles as small as 0.003 microns and removing gases/VOCs with a premium carbon filter. It suits users needing high CADR and wide coverage in large living areas or lofts who accept higher noise and filter costs.","pros":null,"cons":null,"ideal_for":null,"sources":[{"label":"AirDoctor (official store)","url":"https://airdoctorpro.com/products/airdoctor-5500","currency":"USD","source_country":"US","price":999.0,"price_gbp":748.44,"scraped_at":"2026-06-09T03:04:45.309781"},{"label":"Home Depot","url":"https://www.homedepot.com/p/AIRDOCTOR-AD5000-AD5500-4-in-1-Air-Purifier-for-Extra-Large-Spaces-and-Open-Concepts-with-UltraHEPA-Carbon-and-VOC-Filters-AD5500/326013354","currency":"USD","source_country":"US","price":999.0,"price_gbp":748.44,"scraped_at":"2026-06-09T03:04:48.277535"}]}]}