Independent indoor-air decision support
Buy for the airflow, not the hype.
AirVerdicts compares air purifiers and dehumidifiers using room volume, CADR, moisture load, filter cost and primary-source specifications—then turns the math into tools you can actually use.
Start with the problem
Indoor air has different jobs.
A purifier removes airborne contaminants that pass through its filter. A dehumidifier removes water from the air. Choosing the wrong appliance is the fastest way to waste money.
Model comparisons are anchored to current manufacturer specifications instead of copied roundup claims.
We separate 1-ACH marketing coverage from higher-air-change sizing so cross-brand comparisons make sense.
Replacement filters, electricity and drainage logistics can matter more than a small difference in purchase price.
Launch research
High-intent guides first.
The initial cluster is concentrated around room sizing, smoke, pets, basements and model decisions rather than hundreds of thin pages.
Levoit Core 300S vs 400S: The Difference Is Mostly Airflow
Levoit Core 300S vs Core 400S using current manufacturer CADR, room-size, power and noise specifications.
Smoke protectionBest Air Purifier for Wildfire Smoke: CADR, Carbon and Room Sizing
How to choose an air purifier for wildfire smoke using smoke CADR, room volume and realistic air-change targets.
Basement dehumidifiersBest Dehumidifier for a Basement: Capacity, Drainage and Temperature Matter
How to choose a basement dehumidifier using moisture load, drainage, temperature and layout.
Air purifier sizingWhat CADR Do I Need? A Room-by-Room Sizing Method
Calculate the clean-air delivery rate you need from room area, ceiling height and target air changes per hour.
Model comparisonCoway Mighty vs Mighty2: What Changed and Which Makes More Sense?
Coway Airmega Mighty AP-1512HH vs newer Mighty2 using current Coway specifications.
Room-size guideBest Air Purifier for 500 Square Feet: The CADR Target to Use
A 500-square-foot air purifier sizing guide with practical CADR and ACH targets.
Free tool
Calculate the CADR your room needs.
Enter square footage, ceiling height and a target air-change rate. The calculator returns the clean-air CFM target so you can compare products on a consistent basis.
CADR / room-size calculator
Useful for bedrooms, smoke, allergies and large open-plan spaces.