Guides, reviews and how-tos

All guides & reviews · Page 6

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.

Woman on a gray sofa looking at a white and black air purifier near a fireplace in a bright living room

Air Purifiers

Best Honeywell Air Purifiers in 2026: Current HEPA and Washable-Filter Models

Five current Honeywell air purifiers compared on AHAM CADR, filters and running costs, plus what replaced the HPA100, HPA200 and HPA300.

11 min read

Smiling woman sitting on the floor with a phone, pressing a button on a white vented appliance beside an orange leather sofa

Air Purifiers

Best Whole-House Air Purifiers in 2026: MERV 13 Filters, Media Cabinets and Portables

Five ways to clean the air in every room: in-duct media cabinets, an electronic air cleaner, a MERV 13 furnace filter and a large portable, compared.

9 min read

Clear-tank humidifier releasing mist on a nightstand while a woman sleeps in bed behind it

Humidifiers

Should You Close the Door When Using a Humidifier?

Closing the door makes a humidifier work faster but raises the risk of overshooting and wet windows. When to close it, and safe settings for the night.

5 min read

Nail technician in a mask and pink gloves doing a manicure for a smiling client at a white salon table

Air Purifiers

Best Air Purifiers for Hair and Nail Salons in 2026: What Actually Helps

Why ventilated tables and exhaust come first in a salon, what OSHA recommends, and four heavy-carbon or high-CADR purifiers to back them up.

8 min read

Humidifiers

HoMedics Humidifier Not Misting? Fixes From the Manuals

Low water, a loose tank, the humidistat or a scaled-up transducer: how to get a HoMedics humidifier misting again, and why humidifiers keep turning off.

8 min read

White humidifier releasing mist beside small potted cacti while a person reads on a gray sofa

Humidifiers

How Long Does It Take for a Humidifier to Work? A Rough Estimate

In a closed bedroom, a typical humidifier raises the humidity noticeably in about an hour. A whole house takes far longer. Here's the math.

6 min read

Hands lifting a black honeycomb carbon filter out of a white air purifier, with a pleated white filter visible behind it

Air Purifiers

How to Clean a Honeywell Air Purifier: HEPA and Washable ifD Models

Step by step from Honeywell's own manuals: what to wipe, what to wash, what to replace, and how to reset the filter light on HPA and HFD models.

7 min read

White humidifier with a dial on a table releasing a thick cloud of mist in a sunlit room

Humidifiers

Why Is My Humidifier Making the Room Foggy? Causes and Fixes

A little mist above the nozzle is normal. A haze that fills the room means too much output, air near its dew point or tap-water minerals. Here's the fix.

6 min read

Woman wearing a white face mask sitting on a wooden floor next to a large white round air purifier

Air Purifiers

Negative Side Effects of Air Purifiers: Ozone, Ionizers and Other Downsides

The real downsides of air purifiers, from ozone and ionizers to noise, dirty filters and cost, and how to avoid each one.

7 min read

White square tower air purifier with a round display reading 036, next to a plant on a sunlit wood floor

Air Purifiers

Philips 2000i vs 3000i: Specs Compared, and What to Buy in the US Instead

The Philips 3000i covers bigger rooms with one long-life filter, but neither model is a real US option in 2026. Specs side by side, plus US alternatives.

8 min read

Purello water-bowl air freshener with a black top and a lit clear basin on a white desk beside plants and a lamp

Air Purifiers

Purello Air Purifier Review: What It Is and Better Alternatives

The Purello we could identify is a water-bowl air freshener with an ionizer, not a HEPA purifier. What it can and can't do, and what to buy instead.

7 min read

Black and white close-up of tap water running from a chrome kitchen faucet

Humidifiers

What Kind of Water to Use in a Humidifier: Distilled, Tap or Boiled?

Distilled water is the best choice for ultrasonic humidifiers. Many evaporative and steam models are fine with tap water. Here is what the EPA and manuals say.

6 min read