Alex Chen

About Alex

Alex Chen is the Lead Reviewer at The Air Purifier Guide, where he specializes in hands-on product evaluation, CADR (Clean Air Delivery Rate) analysis, and helping budget-conscious consumers find the best air purification value. Since joining the team in early 2026, Alex has personally reviewed over 30 air purifier models across all price ranges.

His approach to product testing combines AHAM-certified performance data with real-world usability assessment. Every review Alex publishes includes verified CADR numbers, measured noise levels at each fan speed, calculated 5-year total cost of ownership, and a clear recommendation based on specific use cases rather than generic star ratings.

Background & Expertise

• Education: B.S. in Environmental Science, University of California, Davis
• Specialization: Indoor air quality product testing, HEPA filtration technology, budget product analysis
• Testing methodology: Based on AHAM AC-1 standards for CADR measurement, supplemented with real-room testing
• Published research references: Regularly cites peer-reviewed studies from Environmental Science & Technology, Indoor Air, and EPA technical reports

Testing Philosophy

"The best air purifier isn't always the most expensive one. It's the one that delivers the right CADR for your room size, at a noise level you can live with, at a total cost you can afford — including replacement filters."

Alex believes in total cost transparency. Every review includes a 5-year cost breakdown covering the unit price, replacement filter costs, and estimated electricity usage. This approach often reveals that a $90 purifier with $15 filters can be cheaper long-term than a $250 model with $60 filters.

Articles by Alex Chen

Browse all articles reviewed and written by Alex on our Reviews page and Budget guides.

Contact

Have a product suggestion or spotted an error in one of Alex's reviews? Get in touch →