Dreo Humidifiers for Days Between Refills: Which Large-Tank Smart Model to Buy
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The short answer: The DREO Smart Humidifier 735S 11L is the best overall for a large-tank smart humidifier that runs for days between refills: its 11 L tank and 100-hour runtime mean the longest stretch between fills in this lineup, at $139.99. Pick the 713S 6L if you want the lowest price at $89.99, or the 717S 8L if you want an 8 L tank and 80-hour runtime for $20 less than the 735S.
- Best overall: Smart Humidifier 735S 11L — 11 L tank and 100-hour runtime give the longest time between refills here, and at 26 dB it is the quietest of the large-tank models. See price at dreo.com
- Best value: Smart Humidifier 717S 8L — 8 L tank with 80-hour runtime and a 600 sq. ft. coverage rating for $119.99, $20 less than the 11 L 735S. See price at dreo.com
- Best compact: Smart Humidifier 713S 6L — The 6 L tank and 6 lb, 11.41 x 6.14 x 13.93 in body make it the smallest and lightest option at $89.99. See price at dreo.com
- Best for quiet large rooms: Smart Humidifier 747S — Rated for 700 sq. ft. and listed at 21 dB, the lowest noise figure in the family, at the same $119.99 as the 8 L 717S. See price at dreo.com
| Product | noise db | dimensions | tank l | weight | Price now | 90-day low | Rating | |
|---|---|---|---|---|---|---|---|---|
| Smart Humidifier 713S 6L | 28 dB | 11.41D x 6.14W x 13.93H | 6 L | 6 lb | $89.99 | — | 4.8 | dreo.com |
| Smart Humidifier 717S 8L | 28 dB | 12.01"D x 6.73"W x 14.45"H | 8 L | 6.9 lb | $119.99 | — | 4.9 | dreo.com |
| Smart Humidifier 735S 11L | 26 dB | 10.24"D x 8.86"W x 30.91"H | 11 L | 5.9 lb | $139.99 | — | 4.9 | dreo.com |
| Smart Humidifier 747S | 21 dB | — | — | — | $119.99 | — | — | dreo.com |
| Smart Humidifier 774S 10L | 32 dB | 9.76D x 9.64W x 24.68H | 10 L | — | $159.99 | — | 4.8 | dreo.com |
Smart Humidifier 713S 6L
Pros
- 6 L tank holds a large volume for fewer refills
- Quiet operation at 28 dB
- Rated 4.8 by users
- Lowest current price in the Dreo humidifier lineup at $89.99
Cons
- No listed run time in hours
- No applicable area or floor-area spec listed
Who it's for: Someone who wants a large-tank, quiet smart humidifier at the lowest price in this lineup.
Smart Humidifier 717S 8L
Pros
- 8 L tank with up to 80 hours of run time between refills
- Covers rooms up to 600 sq. ft.
- Quiet operation at 28 dB
- Rated 4.9 by users
Cons
- At $119.99, it costs $30.00 more than the 6 L Smart Humidifier 713S
- 6.9 lb and 14.45" tall, so it takes up more space than the 6 L model
Who it's for: Anyone wanting a large-tank smart humidifier that can run for days between refills in a room up to 600 sq. ft.
Smart Humidifier 735S 11L
Pros
- 11 L tank is the largest in the lineup, with a rated 100-hour runtime between refills
- Quiet at 26 dB, among the lowest noise ratings here
- Rated 4.9 by users
- Costs $20.00 more than the 717S 8L and $20.00 less than the 774S 10L
Cons
- At 30.91 in tall, it is the tallest of the listed humidifiers
- Priced $50.00 above the 713S 6L
Who it's for: Buyers who want the longest runtime and largest tank in this lineup and have the vertical space for a tall unit.
Smart Humidifier 747S
Pros
- 21 dB noise rating is the quietest among the listed Dreo humidifiers
- Covers up to 700 square feet, the largest floor area in the lineup
- Priced at $119.99, the same as the 717S 8L and $20.00 less than the 735S 11L
Cons
- No tank capacity listed, so runtime between refills is unspecified
- No customer rating listed
Who it's for: Buyers who want the quietest, widest-coverage Dreo humidifier at a mid-range $119.99 price.
Smart Humidifier 774S 10L
How we chose
How we chose: We lined up the five Dreo smart humidifiers and compared tank size, listed runtime, noise rating, coverage area and current price. Tank sizes run from 6 L on the 713S 6L to 11 L on the 735S 11L, with the 717S 8L at 8 L and the 774S 10L at 10 L. Listed runtime is 80 Hours on the 717S 8L and 100 H on the 735S 11L. Noise ratings range from 21 dB on the 747S to 32 dB on the 774S 10L, with 28 dB on the 713S 6L and 717S 8L and 26 dB on the 735S 11L. Coverage is listed at 600 sq. ft. for the 717S 8L and 700 Square Feet for the 747S.
Price decided a lot. The 713S 6L is the lowest at $89.99. The 717S 8L and the 747S both cost $119.99, the 735S 11L is $139.99, and the 774S 10L is the highest at $159.99. The gaps are wide: the 735S 11L costs $50.00 more than the 713S 6L and $20.00 more than the 717S 8L, while the 774S 10L costs $70.00 more than the 713S 6L.
We weighed tank size and runtime first, since that is what determines how long a humidifier goes between refills, then checked noise and coverage, and finally looked at what each price buys.
Who should skip these
If you need a small bedside unit, these are not the models to look at. The smallest tank here is the 713S 6L at 6 L, and it stands 13.93 in tall; the 735S 11L is 30.91 in tall, and the 774S 10L is 24.68 in tall. If a tank under 6 L is what you want, every option here holds more water than that.
The prices run from $89.99 for the 713S 6L to $159.99 for the 774S 10L. The 717S 8L and the 747S both cost $119.99, which is $30.00 more than the 713S 6L. The 735S 11L is $139.99, or $50.00 more than the 713S 6L and $20.00 more than the 717S 8L. The 774S 10L is $70.00 more than the 713S 6L and $20.00 more than the 735S 11L.
Noise is another reason to skip these if quiet matters at close range: the 774S 10L is rated 32 dB and the 713S 6L, 717S 8L, and 735S 11L are rated 28 dB, 28 dB, and 26 dB. The 747S is rated 21 dB.
How to choose the right one
Start with tank size and how long you want to go between refills. The 713S 6L is the smallest here, the 717S 8L steps up to an 8 L tank and an 80-hour runtime, and the 735S 11L holds 11 L with a 100-hour runtime — the longest stretch between fills in this lineup. The 774S 10L sits at 10 L. If you fill less often, go larger.
Then weigh noise and coverage. Noise ratings run from 21 dB on the 747S to 32 dB on the 774S, with the 713S and 717S at 28 dB and the 735S at 26 dB. The 717S covers 600 sq. ft. and the 747S covers 700 square feet.
Finally, look at the price steps. Against the 713S 6L at $89.99, the 717S 8L and the 747S each cost $30.00 more, the 735S 11L costs $50.00 more, and the 774S 10L costs $70.00 more. The 735S 11L costs $20.00 more than the 717S 8L, and the 774S 10L costs $20.00 more than the 735S 11L.
Questions readers ask
Which Dreo humidifier has the largest tank?
The DREO Smart Humidifier 735S 11L has the largest tank at 11 L, followed by the 774S 10L and the 717S 8L.
How long can these humidifiers run between refills?
The 717S 8L is rated for 80 hours of run time and the 735S 11L for 100 hours.
Which model is quietest?
The 747S is rated at 21 dB, quieter than the 735S at 26 dB, the 713S and 717S at 28 dB, and the 774S at 32 dB.
How do the prices compare?
The 713S 6L is $89.99. The 717S 8L and 747S are both $119.99, the 735S 11L is $139.99, and the 774S 10L is $159.99.
Which models cover the most floor area?
The 747S is listed for 700 square feet and the 717S 8L for 600 square feet.
Update history
- — First published
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