10 Best Air Purifier With Humidifier Functions 2026 in the United States

The Dyson Purifier Humidify+Cool Formaldehyde PH04 is an air purifier combined with a humidifier, designed for living rooms or offices. It uses a HEPA filter to capture fine particles and includes a special sensor to detect and break down formaldehyde, which is a common indoor pollutant. This makes it a good choice if you want cleaner air and some protection against harmful gases. The humidifier function helps maintain comfortable humidity levels, which can be especially helpful in dry environments. It operates automatically and can be programmed for convenience.

Weighing 18 pounds, it’s portable enough to move between rooms but not very lightweight. While it’s not smart-home compatible, it comes with a remote control for ease of use. Noise levels are reasonably low, suitable for day and night use. Maintenance requires occasional filter replacement and cleaning of the humidifier, which is typical for devices of this kind. One downside is the limited 90-day warranty, which might be a concern for some buyers. Also, the lack of smart home integration limits remote control options compared to some competitors.

This model provides strong air purification with added humidification, making it a solid option for those wanting both functions in one device, especially if formaldehyde removal is a priority.

The Dyson Purifier Humidify+Cool PH2 De-NOx is a smart choice if you're looking for an air purifier that also humidifies and cools your space. It covers a decent floor area of 270 square feet, making it suitable for medium-sized rooms like bedrooms or living areas. Its filtration system is strong, using a fully sealed 3-stage HEPA H13 filter that traps 99.97% of tiny particles, including bacteria and pollutants like nitrogen dioxide (NO₂), which it removes 50% more effectively than many other purifiers. It also tackles odors, gases, and continuously breaks down formaldehyde, helping to keep your indoor air cleaner.

The humidification function is hygienic, killing 99.9% of bacteria in the water, which is great for adding moisture without spreading germs. Besides purification and humidifying, it cools the room with a smooth airflow thanks to Dyson’s Air Multiplier technology that moves air efficiently and can oscillate up to 350° to spread it around. You can control and monitor air quality remotely via the MyDyson app or with voice commands, and it even offers personalized air quality reports.

Dyson products are often positioned at a premium price point compared to typical air purifiers with humidifiers. The unit’s tall and slim design requires some vertical space. Dyson machines are generally designed to operate quietly, though some sound may be noticeable on higher settings. Maintenance involves replacing filters and cleaning, which is standard but important to consider for ongoing costs and effort. This Dyson model is a high-tech, reliable device that combines air purification, humidification, and cooling with smart controls, making it well-suited for medium-sized rooms and individuals sensitive to air quality.

The Dyson Pure Humidify + Cool PH01 is a combined air purifier and humidifier designed to improve indoor air quality and add moisture to dry air. It uses a HEPA filter that captures very small particles (down to 0.3 microns), which helps clear dust, pollen, and some allergens. Additionally, it includes Dyson's Ultraviolet Cleanse technology to kill 99.9% of bacteria in the water, maintaining clean and safe mist output.

This unit is fairly tall and weighs about 18 pounds, making it suitable for medium-sized rooms. Its Air Multiplier technology circulates purified and humidified air throughout the room to prevent dry or stale air, with the vapor released being invisible, so it won't leave a visible mist around. It operates quietly, featuring a night mode and sleep timer that allow overnight use without disturbance. Maintenance is user-friendly thanks to a hassle-free deep clean cycle, although periodic filter replacement is required as with all HEPA systems.

Refurbished models may show some cosmetic marks but are tested to ensure full functionality. The machine’s touch controls and smart sensors monitor air quality, temperature, and humidity to automatically adjust settings for comfort and efficiency. This device suits users seeking a high-tech, multifunctional air care solution, especially beneficial in dry climates or for those prone to allergies.