Humidifiers
Can You Put Essential Oils in a Humidifier? What Manuals Say
Not in the water tank. Most makers say oils damage the plastic, cause leaks and can void the warranty. Use an aroma pad if your model has one, and mind your pets.
7 min read
Guides, reviews and how-tos
All guides & reviews · Page 2
Every Clean Air Guides article in one place: air purifier and humidifier buying guides, combos, how-to and troubleshooting guides, and indoor air quality explainers.
Guides
How Long to Run an Air Purifier: Per Day, Overnight and 24/7
Run it whenever you're in the room, ideally all the time on Auto or low. A well-sized unit clears a closed room in about 30 to 40 minutes on high.
7 min read
Humidifiers
How to Check Humidity in Your House (and What the Number Means)
A hygrometer is the easiest way to check indoor humidity. Here is how to choose one, test its accuracy, place it and read the result.
6 min read
Guides
How to Reduce Humidity in Your House: 10 Steps That Work
Measure first, then vent moisture outdoors, run the AC or a dehumidifier and cut indoor moisture sources until humidity stays between 30% and 50%.
7 min read
Humidifiers
Humidifier White Dust: What It Is and How to Stop It
White dust is tap-water minerals thrown into the air by ultrasonic and impeller humidifiers. Here is what the EPA and CPSC say and how to stop it.
7 min read
Air Purifiers
Ionic Air Purifiers: How They Work, Ozone and Which Ones to Skip
How ionizers and electrostatic purifiers work, what EPA and CARB say about ozone, which popular HEPA models let you switch the ionizer off, and what we'd skip.
7 min read
Air Purifiers
IQAir HealthPro Plus Review: Airflow, HyperHEPA Claims, Filters and Costs
A research-based look at the IQAir HealthPro Plus XE: what its 300 cfm and 1,125 sq ft claims mean without an AHAM CADR, its filters, power use and AHAM-rated rivals.
8 min read
Air Purifiers
Levoit Core 600S Review: Verified CADR, Real Power Draw, Filters and Alternatives
A research-based look at the Levoit Core 600S (now the Core 600S-P): AHAM CADR, room size, rated vs measured watts, filters, app and CARB listing, plus how it compares.
9 min read
Humidifiers
Levoit OasisMist 1000S Review: Output, Water, Cleaning and How It Compares
A research-based look at the Levoit OasisMist 1000S ultrasonic tower: 350 mL/h, a 10 L tank, 300 to 600 sq ft, Auto mode, water choice, cleaning and rivals.
8 min read
Humidifiers
Levoit Superior 6000S Review: Output, Wicks, Auto Mode and How It Compares
A research-based look at the Levoit Superior 6000S evaporative humidifier: 1,500 mL/h, a 6-gallon tank, the 3,000 sq ft claim, wicks, Auto modes and rivals.
9 min read
Guides
MERV Rating Chart: What MERV 11, 13 and 16 Filters Actually Capture
A MERV rating chart built from ASHRAE 52.2 minimums, plus how MERV compares with HEPA and MPR, which rating suits smoke, allergies and pets, and when your HVAC can't take it.
7 min read
Combos
Sharp KCP110UW Review: CADR, Humidifier Output, Plasmacluster and Rivals
A research-based look at the Sharp KCP110UW purifier-humidifier: AHAM CADR, 538 sq ft, real humidifying output, the small tray, Plasmacluster ions, filters and alternatives.
8 min read