HOBOT
Hobot 298
- Autonomy
- IIAssisted
- Score
- 65/100Capable
- Readiness
- Ready Now
- Price
- $249list
ComparisonHobot 298 and HUTT DDC55
HUTT
HUTT DDC55
- Autonomy
- IIAssisted
- Score
- 51/100Limited
- Readiness
- Not assessed
- Price
- $279list
Up to three
Autonomy Ladder
- IManual
- IIAssisted
- IIIConditional
- IVEnvironmental
- VGeneralized
All robot window cleaners. Every figure below is placed against the whole class, so a gap can be read against how much the class itself varies.
Where each one suits you.
The conditions each robot was assessed against, side by side. Rows marked in gold are where these machines genuinely differ.
| Condition | Hobot 298 | HUTT DDC55 |
|---|---|---|
| Window style | ||
| Standard residential | GoodOptimized for 6-12 sq ft panes on standard residential frames. Ultrasonic spray performs consistently across typical glass. | GoodOptimized for 5-10 sq ft panes on standard residential frames. Spray pad performs adequately for light-soiling scenarios. |
| Large panes (8 ft+) | DependsSquare pad (5×5 in) leaves corner gaps on panes above 15 sq ft. Multiple passes or manual corner cleaning typical. | DependsPanes above 12 sq ft require extended spray time and multiple passes. Suction motor lacks power to compensate for coverage gaps. |
| Specialty / texturedthey differ | DependsCurved or heavily tinted tempered glass challenges edge detection. Optical sensors less reliable; manual intervention increases. | PoorCurved, frameless, or heavily tinted glass challenges vacuum edge detection. Limited spray coverage makes specialty windows impractical. |
| Frame style | ||
| Frameless / minimal | DependsFrameless glass reduces optical contrast for edge detection. Robot may drift or reposition unpredictably without visual boundary. | DependsOptical edge detection less reliable on frameless glass. Robot may drift or reposition unpredictably without visual boundary. |
| Standard mullions | GoodStandard wood, aluminum, or vinyl frames provide clear visual boundaries. Vacuum edge detection works reliably. | GoodStandard wood, aluminum, or vinyl frames provide clear visual contrast for edge detection. Vacuum grip works reliably. |
| Heavy bezels | DependsMetal frames with deep recesses trap moisture and spray residue. Frequent inspection needed to prevent water pooling and motor intake clogging. | DependsMetal-frame windows with complex joinery collect spray moisture in recesses. Weekly inspection prevents water pooling and intake clogging. |
| Building height | ||
| Single-story | GoodGround-level and platform-accessible windows are primary use case. Safety and power cord management straightforward. | GoodGround-level and platform windows are primary design target. Suction grip and rope handling straightforward. |
| 2 – 3 storiesthey differ | GoodSecond-story windows (15-20 ft) feasible with careful rope rigging and power cord routing from extension outlet. | DependsSecond-story windows (15-20 ft) feasible with external anchor, but suction capacity approaches limits. Test on lower pane first. |
| 4+ storiesthey differ | DependsHeights above 25 feet stretch cable runs and suction reliability limits. External anchor and secondary tether strongly recommended. | PoorHeights above 25 feet exceed safe suction capacity and motor power. Secondary tether and external rigging strongly inadequate for this class. |
| Power preference | ||
| Corded OK | Good30-meter power cable with outdoor-rated connector. Requires outlet access; extension cord use discouraged by manufacturer. | Good25-meter power cable with outdoor connector. Requires outlet within cable range; extension use discouraged by manufacturer. |
| Cordless preferred | PoorHobot 298 is corded only; no battery option available. | PoorHUTT DDC55 is corded only; no battery option available. |
| No preference | GoodCorded operation is standard; cordless alternative not offered by manufacturer. | GoodCorded operation is standard; cordless alternative not offered. |
A robot being poor for a condition is a fact about fit, not a fault. “Depends” means the record names a limit worth reading, not that the answer is unknown.
What the score is built from.
Nine inputs across three pillars, each weighted as shown and each scored so more is better. A robot can lead on one and trail on another, which is the point of showing them apart.
Capability
Task completion16% of score
Does it finish the job it is sold to do, unattended
5870
- Hobot 29858
- HUTT DDC5570
18median 72 across 433 scored robots100
Coverage and navigation10% of score
Does it work the whole area, and hold that between runs
5255
- Hobot 29852
- HUTT DDC5555
0median 70 across 421 scored robots100
Edge-case recovery10% of score
Does it recover from the failures its category presents
5650
- Hobot 29856
- HUTT DDC5550
18median 52 across 320 scored robots100
Operating envelope4% of score
How far conditions can vary before performance drops
5775
- Hobot 29857
- HUTT DDC5575
28median 68 across 397 scored robots100
Dependability
Field failure rate16% of score
Documented hardware failures per owner-year
8564
- Hobot 29885
- HUTT DDC5564
6median 70 across 359 scored robots100
Software stability14% of score
Whether updates fix more than they break
7133
- Hobot 29871
- HUTT DDC5533
15median 65 across 342 scored robots100
Support longevity10% of score
Committed parts, service and updates, with dates
8232
- Hobot 29882
- HUTT DDC5532
0median 62 across 429 scored robots100
Ownership burden
Routine maintenance12% of score
Hands-on time it asks for in normal operation
3225
- Hobot 29832
- HUTT DDC5525
22median 67 across 434 scored robots100
Consumables8% of score
Parts that must be bought to keep it working
6669
- Hobot 29866
- HUTT DDC5569
8median 69 across 434 scored robots100
How far apart is a long way?
A number only means something next to the spread it sits in. Each track is the real range across every classified robot in the class, with the median marked.
Price21 with a published figure
$249$279
- Hobot 298$249
- HUTT DDC55$279
$150median $349$850
Adhesion (mode not stated)19 with a published figure
2,800 Pa3,800 Pa
- Hobot 2982,800 Pa
- HUTT DDC553,800 Pa
2,800 Pamedian 3,800 Pa10,000 Pa
Noise20 with a published figure
65 dB65 dB
- Hobot 29865 dB
- HUTT DDC5565 dB
63 dBmedian 68 dB75 dB
Weight22 with a published figure
2.6 lbs2.5 lbs
- Hobot 2982.6 lbs
- HUTT DDC552.5 lbs
1.3 lbsmedian 3.1 lbs4.8 lbs
Height24 with a published figure
3.5 in3.3 in
- Hobot 2983.5 in
- HUTT DDC553.3 in
2.2 inmedian 3.2 in9.4 in
Not compared, because fewer than two of these robots carry a published figure: Runtime, Charge time.
What the numbers leave out.
Written on each record, and the only thing here every robot on the site carries.
The trade-off
What each design gives up to be good at what it is good at.
Hobot 298
Mains power removes recharge cycles, and an embedded UPS holds the robot in place for 20 minutes through an outage, but the 4 meter cord ties the machine to a socket within a few paces of the pane.
HUTT DDC55
Entry-level cost buys fundamentals rather than features: the DDC55 holds the glass with a suction range HUTT states as 2000 to 3800 Pa and cleans with twin rotating discs, but it is a corded, remote-controlled machine with no app, no schedule and no mapping, and each pane is started by hand.
Who each one is wrong for
Stated by the record itself. A robot being wrong for a household is a fact about fit, not a fault.
Hobot 298
- High-rise or multi-story installations requiring extended reach
- The power cord is 4 meters and the supplied safety rope is 4.5 meters, so both the socket and the rope's indoor anchor point have to sit close to the pane being worked. Windows further from an interior socket than that are outside what this model reaches.
- Homes without adjacent power outlets or outdoor outlets within cable run
- Extension cord use is discouraged by manufacturer for safety. Interior outlet management becomes critical; wet-environment electrical safety is owner's responsibility.
- Specialty or curved glass surfaces
- Square pad geometry and fixed nozzle positioning leave corners uncleaned. Tempered or heavily tinted windows challenge optical edge detection; manual repositioning is frequent.
HUTT DDC55
- Windows with no immovable anchor point for the safety rope
- HUTT's procedure requires the safety rope's locking ring to be fixed to a solid object that cannot be dragged, and requires the rope to be checked before every run for secure attachment and damage. Where a window offers no such anchor within reach, the machine should not be run on it.
- Hard-water areas or homes with frequently soiled panes
- The cloths are wetted by hand before a run and the machine carries no water of its own, so mineral deposits and heavy pollen mean pre-treating the pane and changing the cloth part way through.
- Owners needing app control, scheduling or mapping
- The DDC55 is driven from a handheld remote. There is no network connection, no app and no schedule, and the machine has to be placed on each pane by hand before it will run.
What stays your job
The upkeep ownership hands back to you, whatever the autonomy level says.
Hobot 298
- Weekly: Rinse pad and inspect nozzle for mineral deposits; test suction by listening for motor speed consistency.
- Monthly: Clean intake ports and motor filter with soft brush; soak nozzle in distilled vinegar if spray pattern weakens.
- Every 3-4 months: Replace cleaning pads (~$20-25 per pair); inspect power cable for insulation damage.
- Annually: Replace motor intake filter (~$15); deep-clean nozzle assembly by soaking in 50/50 vinegar-water solution.
- As needed: Replace vacuum motor assembly if suction falls below specification (~$80, typical at 5-6 year mark with regular use).
HUTT DDC55
- Before every run: Check that the safety rope is undamaged and that its locking ring is fixed to a solid object that cannot be dragged.
- After every use: Remove the cleaning cloths from the turning discs, rinse them and let them dry before the next run.
- Weekly: Inspect the cloths for loose threads, tears or embedded grit and replace worn cloths.
- Bi-weekly: Clean the vacuum intake and motor filter with a soft brush, especially in dusty environments.
- Monthly: Inspect the power cable, adapter and extension lead for insulation damage, and confirm the extension lead’s locking knob is tight.
- Seasonally: Before extended storage, dry all components and store the cable loosely indoors to prevent moisture damage.
How much each of these is standing on.
Classifications rest on different depths of evidence. A pre-release assessment and a verified one are not the same kind of claim.
| Robot | Evidence status | Sources reviewed | Last assessed |
|---|---|---|---|
| Hobot 298 | Provisional | 4 | Aug 2026 |
| HUTT DDC55 | Discontinued | 1 | Aug 2026 |
Evidence status counts the sources behind a classification, not their kind. A high count can be maker documentation and price coverage, so read it as how much was reviewed rather than as independent testing. How we weigh evidence.
Keep going.
The full recordHobot 298Specifications, evidence, the Fit Check in full, and every tracked change.
The full recordHUTT DDC55Specifications, evidence, the Fit Check in full, and every tracked change.Robovations classifies robots; it does not rank them. Nothing on this page is a recommendation, and no manufacturer influences a classification or its placement here.
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