Boneco
Boneco U350
Swiss, expensive, and unusually straight about what it does: 3.17 gallons a day published, against a 650 sq ft claim that the load calculation puts at 780. A maker printing a number 17% below what its own output supports is doing something almost nobody else in this catalog does. It pairs a demineralisation cartridge with an Ionic Silver Stick for the water, so the two failure modes of a cheap ultrasonic - dust on the furniture, life in the tank - both have a specific countermeasure. The tank is only 5 litres, which at full output is about ten hours.
The room-size claim, reconciled
781 sq ft supported · box says 650 sq ft
The 650 sq ft on the box is what the winter load calculation supports for this output — one of 18 units here whose claim lands within 5% of its own published rate.
Holding 650 sq ft takes about 2.64 gal/day, which drains this 1.32-gallon tank in roughly 12 hr.
What a year costs
Boneco's A250 demineralisation cartridge runs about $20 and lasts two to three months in hard water. Electricity assumes the rated 300 W for 12 hours a day across a 150-day heating season at 16¢ per kilowatt-hour.
Specifications
A claim the maker makes
Boneco says the included Ionic Silver Stick uses silver's antibacterial effect to keep the water clean. We quote it rather than repeat it: this site has not tested it and neither has anyone independent.
Maintenance profile
- Top fill
- Yes
- Replaceable media
- Demineralisation cartridge
Facts, not a score. Which of these matter depends entirely on whether the unit ends up somewhere you will actually clean it.
Features
- 3.17 gal/day published output against a conservative 650 sq ft claim
- Warm or cool mist
- A250 demineralisation cartridge
- Ionic Silver Stick water treatment
- Top-fill 5L tank
- Digital humidistat with auto mode
- Cleaning reminder
Pros
- One of only a handful of units here whose published room size is smaller than its own output would justify
- Demineralisation cartridge and silver stick address dust and tank biology separately rather than pretending one solves both
- Warm mist option and a genuine 3+ gallons a day in a top-fill tabletop unit
- Owners describe build quality and longevity well beyond the mass-market ultrasonics
Cons
- Ten hours per tank at full output - the capability is there, the water is not
- Cartridges at roughly $20 every two to three months
- 300W with warm mist engaged - the setting rather than the unit decides the electricity bill
- $230 is a lot next to a Dreo HM713S that publishes the same output
What owners say
Summarised from owner discussions and long-form owner reviews. Nobody here has used this unit.
Swiss, expensive, and unusual in this catalog for printing a room-size figure below what its own published output supports. Owners describe it as a machine that lasts, in a category where most units are seasonal purchases.
The design thinking shows in the details: a demineralisation cartridge for the minerals and an Ionic Silver Stick for the water, treated as two separate problems because they are. The trade is a five-litre tank against three gallons a day of output, which is about ten hours — so the capability is real but the refill interval is short if you use it.
The practical worry owners raise is supply. Accessory availability in the US has become patchy enough that owners have asked openly whether Boneco still sells parts here, which matters for a unit whose cartridges and sticks are consumables.
What owners like
- One of very few units whose published room size is smaller than its own output would justify — the maker is underselling it
- Demineralisation cartridge and a silver stick address mineral dust and tank biology separately rather than pretending one solves both
- Warm mist and a genuine three-plus gallons a day in a top-fill tabletop unit
- Owners describe build quality and service life well beyond the mass-market ultrasonics
Common complaints
- Ten hours per tank at full output — the capability is there, the water is not
- Cartridges every two to three months are a recurring cost
- The warm setting draws a great deal of power
- Boneco accessories have become harder to find in the US, and owners have asked whether they are still sold here at all
Questions owners ask
Is the coverage claim honest?
What is the Ionic Silver Stick for?
Can I still get parts in the US?
Boneco U350, head to head
Looked at alongside it
More from Boneco →
Boneco
Boneco U700
Four gallons a day from a tabletop unit, which puts the U700 level with Vornado's Evap40 console on output while taking up a fraction of the floor. Its 1,000 sq ft figure lands within two percent of the load calculation - Boneco and Vornado are the two brands here whose marketing numbers and physics agree. Nine litres is the largest tank of any tabletop unit in the catalog and still only fourteen hours at full tilt, which is the recurring lesson of this category: capability and refill interval trade against each other and no amount of marketing changes it. The self-cleaning mode is genuinely unusual at any price.
985 sq ft supported · box says 1,000 sq ft
Boneco
Boneco W200 Air Washer
An air washer works by spinning a stack of plastic discs through a water bath: air passes over the wet surfaces, picks up moisture, and drops some dust on the way. The appeal is that there is no wick to buy - ever - because the discs are permanent and go in the dishwasher. Boneco's technical data gives 350 grams an hour, which is 2.22 gallons a day and supports about 547 sq ft, so the 540 on the listing is one of the few coverage claims in this catalog that its own maker's output figure actually backs. The rest of the arithmetic is as plain: a 4.5-litre bath, one silver stick a year, no filters, and about thirteen hours between fills if you are running it at the room it claims.
547 sq ft supported · box says 540 sq ft
Dreo
Dreo HM717S
Eight litres, warm and cool mist, a published 500 mL/hr, and a demineralisation cartridge - on paper the most complete portable in Dreo's line. The extra two litres over the HM713S buy about four more hours at full output rather than the twenty the runtime figures suggest, because the 80-hour number is again the lowest setting. Where it genuinely earns the money is the middle: run it on auto in a 400 sq ft bedroom and it will go two or three nights between fills without a chilly mist or a dusty dresser.
781 sq ft supported · box says 600 sq ft