Research

Independent studies on air quality and particulate matter in Hanoi, Vietnam (2019).

Sensor Evaluation

• Low-Cost PM2.5 Sensors — Calibration of SDS011 and PMS7003 against a FEM reference station

Mask Studies

• Face Mask Filtration — PM2.5 removal efficiency of 11 masks across 4 types
• Used Mask Filtration — Can you wash and reuse PM2.5 masks? (74-82% RE retained)

Indoor Air & Emissions

• Indoor vs Outdoor PM2.5 — Sealed apartment reduces PM by only 13-17%
• Firewood Stove Emissions — Cooking emits 65-95% more PM than background

Reference

• AQI Calculation Guide — How PM2.5 becomes an AQI number (US vs Vietnam methods)

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Table of contents

• Low-Cost PM2.5 Sensors
• Face Mask Filtration
• Indoor vs Outdoor PM2.5
• Firewood Stove Emissions
• Used Mask Filtration
• AQI Calculation Guide