Best Cool & Warm Mist Humidifiers Compared

DREO HM713S 6L Smart Warm & Cool Mist – Best Smart Dual Mist

Overview The DREO HM713S is a 6L smart warm and cool mist humidifier with up to 60 hours of runtime, sub-30dB quiet operation and coverage to roughly 500 sq.ft. It pairs with the DREO app and Alexa/Google for scheduling and auto humidity, and uses a top-fill design with a dedicated warm mist heater for sterilized steam.

Where this unit pulls ahead is execution – the DREO app is polished, auto mode actually tracks the target RH closely, and the warm mist channel runs cleanly without the gurgle some dual units produce. The 60-hour figure is realistic on the lowest cool setting, and the on-device controls remain useful even with the app offline.

The 6L tank means it cannot match a 9L unit for multi-night warm-mist runtime, and at this price you are paying for the smart hardware rather than raw capacity. Warm mode also draws more power than cool-only DREO models, as expected for any dual unit.

Pros

• Polished DREO app with accurate auto mode

• Dual cool and warm mist with antibacterial steam

• 60-hour runtime on low cool setting

• Sub-30dB quiet operation

• Works with Alexa and Google Assistant

Cons

• 6L tank limits warm-mist runtime

• Premium pricing for the capacity

• Warm mode increases power use

Best for Buyers who want the most refined smart experience in a dual cool and warm mist humidifier.

GloryAir 9L Warm & Cool Mist – Best 9L Capacity

Overview The GloryAir 9L is a top-fill dual cool and warm mist humidifier with a 2.38Gal tank aimed at large bedrooms and open living spaces up to roughly 750 sq.ft. It runs around 26–28dB on low and pushes 60+ hours of runtime on the lowest mist setting.

The standout here is sheer endurance – 9L is enough to skip refills for two or three nights in a dry winter bedroom, and the warm mist mode briefly boils water before atomizing, which cuts bacterial carryover and warms the room by a degree or two.

Trade-offs are mainly size and lack of connectivity – the base footprint is larger than 6L units, there is no Wi-Fi or app control, and warm mist on max draws noticeably more power than cool mist alone.

Pros

• 9L/2.38Gal tank for 60+ hour runtime

• Dual cool and warm mist with antibacterial warm steam

• Top-fill design with wide opening for easy cleaning

• Quiet 26–28dB on low setting

• Covers large bedrooms and open rooms

Cons

• No app or voice control

• Larger footprint than compact units

• Warm mode increases power draw

Best for Largest dual-mist capacity for big bedrooms without paying for smart features.

DREO HM717S 8L Supersized Warm – Best Large-Room Warm Mist

Overview The DREO HM717S is an 8L smart dual-mist humidifier sized for large rooms up to 600 sq.ft, with both cool and "Supersized Warm" mist modes plus 80 hours of runtime on low. It pairs over 2.4GHz Wi-Fi to the DreoHome app, supports Alexa and Google Assistant, and uses an onboard humidity sensor for auto-mode RH targeting. Top-fill design with wide opening keeps maintenance simple.

The "Supersized Warm" mode is the differentiator – DREO turned up the heater output meaningfully versus the smaller HM713S, so warm mist actually fills a 600 sq.ft room rather than just steaming the immediate area around the unit. Combined with the 8L tank and 80-hour cool runtime, this is the DREO pick when you want both real warm-mist output and multi-night endurance.

Trade-offs are honest: at $120 it sits at the upper end of the dual-mist category, and the 8L tank is heavy enough that you'll top-fill in place rather than carry it to the sink. Like all DREO smart units it needs 2.4GHz Wi-Fi for app pairing, and warm mode draws noticeably more power than cool-only operation.

Pros

• DREO brand reliability – polished DreoHome app and consistent firmware support

• "Supersized Warm" mode actually heats a full large room, not just nearby air

• 8L tank with 80-hour cool runtime

• App, Alexa and Google Assistant control with auto-RH mode

• 600 sq.ft coverage handles large bedrooms and small open spaces

Cons

• 2.4GHz Wi-Fi only – no 5GHz support

• 8L tank is heavy when full

• Warm mist mode increases power draw

Best for Buyers who want DREO's smart ecosystem with the strongest warm-mist output for large bedrooms or small open rooms.

GloryAir 6L Compact Warm & Cool Mist – Best Compact Dual

Overview The GloryAir 6L compact is the smallest of the three, designed for nurseries, offices and bedrooms up to roughly 500 sq.ft. It keeps the same dual cool and warm mist system and top-fill format in a shorter body, with 26dB quiet operation and 40+ hours of runtime on low.

The appeal is fit – a 6L tank is light enough to lift one-handed, the footprint clears most nightstands, and the warm mist mode still boils water before atomizing to suppress bacteria and mold spores.

The trade-off is runtime: at high warm mist, the tank empties in roughly a night, so refills become a daily habit in very dry climates.

Pros

• Compact 6L tank fits nightstands and desks

• Dual cool and warm mist with antibacterial steam

• Quiet 26dB operation

• Easy top-fill with aroma tray

• Light enough to refill one-handed

Cons

• Daily refills on high warm mist

• No smart or app control

• Approximate humidistat readings

Best for Smaller bedrooms, nurseries and offices that want dual mist without a bulky unit.