Guides, reviews and how-tos

All guides & reviews · Page 3

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.

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

Humidifiers

Warm Mist vs Cool Mist Humidifier: Safety, Energy, White Dust and Cleaning

Cool mist is the safer pick for kids and pets and uses far less power. Warm mist puts out little or no white dust from steam. Here's how they compare.

8 min read

White air purifier with a round digital display in front of white louvered doors, with a graphic of flowing air

Guides

What Is CADR? Clean Air Delivery Rate Explained, With the 2/3 Rule

CADR is how many cubic feet of particle-free air a purifier delivers per minute. Here's how AHAM tests it, how to size a room with it, and what it can't tell you.

7 min read

Dark humidifier releasing mist at night near a bed, with a glowing orange lamp and a woman resting behind it

Humidifiers

Where to Put a Humidifier: Best Spot in the Bedroom and Every Room

Put it in the room you use most, on a firm, waterproof surface a few feet from the bed, walls and curtains, with the mist aimed into open air. Here's what manuals say.

7 min read

Close-up of a white air purifier with a glowing purple control ring and drawn blue airflow lines

Guides

Wildfire Smoke Indoors: How to Protect the Air in Your Home

Close up the house, set up one cleaner air room and run a CARB-certified air purifier sized for smoke on high. Here's EPA's plan, step by step.

7 min read

Woman meditating with eyes closed on a sunlit floor beside a white dehumidifier with a clear water tank and a gray sofa

Guides

Air Purifier vs Dehumidifier: Particles vs Moisture, and Which One You Need

An air purifier filters particles; a dehumidifier pulls moisture out of the air. Here's which one helps with mold, allergies and damp basements, and when you need both.

6 min read

Two bright green leaves lying on the white pleats of an air filter

Air Purifiers

Best Air Purifiers for Allergies in 2026: Pollen, Dust Mites and Dander

Six current air purifiers for pollen, dust mite and dander allergies, picked on verified pollen CADR, HEPA-grade filters, room size and ionizer status.

10 min read

Woman stretching on a floor cushion by a bed and low wooden table, with a white round air purifier in the foreground

Air Purifiers

Best Air Purifiers for a Bedroom in 2026: Quiet, Dark and Sized to Run All Night

Five bedroom air purifiers with published sleep-mode noise, light and display options, verified CADR for bedroom sizes and what a night of running costs.

10 min read

White air purifier with Auto and sleep indicator lights in front of sheer white curtains, a beige armchair at the edge

Air Purifiers

Best Air Purifiers for Dust in 2026: Fine Dust, Big Rooms and Pre-Filters

Six current air purifiers for dusty homes, picked on verified dust CADR, HEPA filters, cleanable pre-filters and real room sizes, plus what else to do about dust.

8 min read

Beagle with a red collar sitting on a gray floor next to a tall white tower appliance against a light blue wall

Air Purifiers

Best Air Purifiers for Pets in 2026: Hair, Dander and Odor

Seven current air purifiers for homes with dogs and cats, picked on verified CADR, washable pre-filters for hair, carbon for odor and real filter costs.

10 min read

Smiling woman holding a baby on a sofa, with a white humidifier with a digital display in the foreground

Humidifiers

Best Humidifiers for a Baby in 2026: Cool Mist, Quiet and Easy to Keep Clean

Four cool-mist and evaporative humidifiers for a nursery, picked from maker specs and manuals, plus the humidity range, water, cleaning and placement rules.

9 min read

Woman sleeping in a white bed behind a clear-tank humidifier releasing a thin stream of mist on a nightstand

Humidifiers

Best Humidifiers for the Bedroom in 2026: Quiet, Overnight and Easy to Clean

Six bedroom humidifiers picked from maker specs and manuals: published noise levels, overnight runtime, cool or warm mist, white dust and cleaning.

11 min read

Gray cat with folded ears on a gray armchair next to a white humidifier releasing mist from its top

Humidifiers

Best Humidifiers for Large Rooms in 2026: Output, Wicks and Whole-House Options

Six humidifiers for rooms over 500 sq ft, picked from maker specs and manuals, plus when a whole-house unit on your furnace makes more sense.

13 min read