TITLE: Honeywell Allergen Plus 4-in-1 HEPA Air Purifier (HPA4300B) Verified Details META_DESCRIPTION: Verified details on the Honeywell Allergen Plus HPA4300B HEPA air purifier, including confirmed ENERGY STAR certification and specs. BODY: What the Honeywell Allergen Plus HPA4300B actually is The Honeywell Allergen Plus 4-in-1 HEPA Air Purifier (model HPA4300B) is a HEPA-based air purifier marketed for homes with allergens. It is designed to filter particles from room air using a multi-stage filtration approach, including a HEPA filter. Verification summary TrustCommerce Labs verified this product on 2026-08-22. The overall verification status is "verified." The product's ENERGY STAR certification was checked through the official U.S. government ENERGY STAR Product Finder. According to that official source, the HPA4300B has a confirmed, exact-match ENERGY STAR certification from the EPA/DOE. Confirmed specifications from ENERGY STAR The ENERGY STAR listing for the HPA4300B includes the following verified performance details: - Room coverage: 355 sq ft - Annual energy use: 185 kWh/yr - Integrated energy factor: 7.4 cfm/Watt - Smoke CADR: 229 - Dust CADR: 238 - Pollen CADR: 245 - PM2.5 CADR: 233 What this verification means (and doesn't mean) This verification confirms that the HPA4300B has a real, active ENERGY STAR certification from the U.S. government, and that its listed performance numbers match the official record. It does not include certification or validation of any other claims the manufacturer or retailers may make about health benefits, filtration effectiveness beyond what ENERGY STAR reports, noise levels, or usability features. No additional certifications beyond the ENERGY STAR listing were confirmed in this verification. Shopping notes for consumers If you're comparing the HPA4300B against other air purifiers, the ENERGY STAR listing gives you a standardized set of efficiency and performance numbers that can help you judge its operating costs and rated coverage area. For questions about actual user experience, filter replacement schedules, warranty terms, or real-world noise levels, those items were not verified here and would need to be checked through other sources. The official ENERGY STAR Product Finder link is the source for confirming the certification details above.