Olivia Chen
Chief Environmental Appliance Engineer · Y&O
About
Olivia Chen is the Chief Engineer of Environmental Appliance R&D at Y&O , based in Foshan, Guangdong — the heartland of China's global home appliance manufacturing industry. She holds a Bachelor of Engineering in Mechanical Engineering with a specialization in fluid thermodynamics, the discipline at the core of steam-based humidification system design.
Her engineering focus: how to deliver clean, controlled moisture to indoor environments without introducing new air quality risks. That constraint — not marketing preference — drives Y&O's steam-first product philosophy. Her work spans heating chamber material selection, aerosol output calibration, multi-room coverage modeling, and long-cycle reliability testing.
Articles on this blog are her engineering notes: data-grounded, transparent about trade-offs, written for readers who want to understand the why behind indoor air quality decisions — not just a product recommendation.
Areas of expertise
Products designed
Y&O YO-M2 — Steam Humidifier
10L capacity, filterless design, 212°F thermal sterilization, up to 1,000 sq. ft. coverage. ETL Listed for sale in the United States and Canada.
Y&O A1 (YO-A1) — Steam Aromatherapy Diffuser
180W electric-heat steam vaporizer with integrated scent delivery system. GB safety certified. Utility model patent granted (CNIPA, 2025).
Certifications & third-party test reports
ETL Listed — North American market certification Intertek
Authorizes the Y&O brand YO-M2 steam humidifier to carry the ETL Listed mark for the United States and Canadian markets.
Standards: UL 998:2020 Ed,6+R:05Jul2022 and CSA C22.2#104:2020 Ed,5+U1
Control No. 5025277 · ATM Report 221114105GZU-001 · Issued: April 14, 2023CQC product certification certificate China Quality Certification Centre
Issued by the China Quality Certification Centre (CQC). Covers models YO-M2, YO-M3, YO-M4, YO-M5, YO-M6 (1000W 220V~50Hz).
Standards: GB 4706.1-2005 & GB 4706.48-2009. Certification scheme: product testing + initial factory inspection + follow-up factory inspection.
Cert. No. CQC23008377901 · Valid: Feb 28, 2023 – Dec 12, 2027CQC test report — YO-M2 through YO-M6 CMA · CNAS · ILAC-MRA
Issued by 中认英泰检测技术有限公司. Full product line YO-M2 to YO-M6. Safety standards: GB 4706.1-2005 & GB 4706.48-2009. All items: pass.
Application No. V2022CQC008015-1030085Inspection report — heated steam humidifier (YO-M2 series) CMA · CNAS · ILAC-MRA
Issued by 赛旺检验检测认证有限公司 (CNAS L14533). Electrical safety testing per GB 4706.1-2005 & GB 4706.48-2009. All items: pass.
Report No. SCLW01202502974 · 2025Inspection report — A1 steam aromatherapy diffuser (YO-A1) CMA · CNAS · ILAC-MRA
Issued by 赛旺检验检测认证有限公司 (CNAS L14533). YO-A1, 180W 220V. Grounding resistance: 0.02Ω (standard ≤0.1Ω). All items: pass.
Report No. SCLW01202402643 · Issued: November 14, 2024Antimicrobial efficacy test report — YO-M Series steam humidifier ICAS · NCA Accredited
Issued by 英格尔检测技术服务（上海）有限公司 (ICAS). Steam sterilization efficacy tested against 3 pathogen strains at 30-minute contact time. See data below.
Report No. SHF26020022-01R1 · NCA2411544–47 · Issued: February 27, 2026Utility model patent — steam-heated aromatherapy humidifier CNIPA
Granted by the China National Intellectual Property Administration. Covers the steam-heat aromatherapy mechanism in the Y&O A1 product line.
Patent No. ZL 2024 2 1387237.5 · Granted: May 6, 2025Third-party antimicrobial test data — YO-M series steam humidifier
Independent laboratory: ICAS (NCA Accredited, Shanghai) · Contact time: 30 minutes · Method: client protocol
Elimination rate measured against control group (CFU/mL). Results reflect steam heating mechanism performance at boiling point — consistent across the YO-M series product line. Source: Report SHF26020022-01R1, issued February 27, 2026.
