How to Choose the Right Duct Cleaning Robot: Complete Selection Guide 2026
Choosing the wrong duct cleaning robot costs you more than money — it costs you jobs. A robot too large for residential ducts wastes maneuverability. A robot too small for commercial risers lacks the power to clean effectively. This guide walks through exactly how to match a robot to your business, duct sizes, and job types.
Step 1: Identify Your Primary Application
| If You Clean... |
You Need... |
Recommended Robot Type |
| Commercial kitchen exhaust hoods and grease ducts (restaurants, hotels) |
Waterproof, chemical-resistant robot with high-torque brush for baked-on grease. Must handle 200-800mm ducts. |
Kitchen exhaust robot — CR360
|
| HVAC air ducts (office buildings, schools, hospitals) |
All-in-one system with brush, vacuum, and inspection camera. Must handle 150-600mm ducts. |
AC duct cleaning machine — K7S
|
| Flat/rectangular ductwork (commercial buildings, malls) |
Specialized robot designed for rectangular cross-sections, not just round ducts. |
Flat duct robot — K5
|
| Industrial pipelines and large-diameter ducts (factories, power plants) |
Heavy-duty robot with powerful motor for 500-1500mm+ ducts. |
Industrial robot — E200
|
Step 2: Match Robot Specifications to Your Jobs
Duct Diameter Range
This is the most important spec. A robot must fit inside the smallest duct you clean and reach the walls of the largest duct you clean. Measure your typical duct sizes across your last 20 jobs. Most commercial contractors need 200-600mm coverage for kitchen exhaust and 150-500mm for HVAC.
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CR360: 200-800mm — the widest range for kitchen exhaust contractors
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K7S: 150-600mm — covers 95% of HVAC ductwork
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K5: 150-500mm flat/rectangular — specialized for commercial buildings
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K9: 200-800mm — high-speed for maximum daily productivity
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E200: 500-1500mm — industrial and large-diameter only
Brush Type and Cleaning Power
For light dust and debris (HVAC systems), a standard nylon brush at 100-200 RPM is sufficient. For heavy grease (kitchen exhaust), you need a high-torque motor driving a stiff brush at 50-100 RPM — speed matters less than torque when breaking through baked-on grease. The CR360 uses a geared high-torque drive specifically for this application. If you clean both HVAC and kitchen exhaust, you need two different robots or a system with interchangeable brush heads designed for both applications.
Camera and Documentation
Commercial clients and fire marshals require proof of cleaning. Every Gaolijie robot includes an HD pan-tilt camera with LED lighting and DVR recording capability. Before/after video documentation is not optional for commercial work — it is the deliverable the client pays for. Specifications to compare: resolution (1080p minimum), pan range (360°), tilt range (180°), and recording format.
Cable Length
Standard cable length is 20 meters (65 feet), which covers most single-story duct runs. For multi-story buildings or long horizontal runs in malls and hospitals, you may need 30-40 meter cables. Confirm the maximum cable length supported by the control system before purchasing.
Step 3: Budget and ROI Calculation
| Robot |
Factory Price (FOB) |
Typical Jobs/Month |
Revenue/Month |
Payback Period |
| CR360 Kitchen Exhaust |
$4,980-7,800 |
15-25 |
$9,000-20,000 |
2-4 months |
| K7S HVAC System |
$5,990-7,500 |
12-20 |
$7,200-16,000 |
3-5 months |
| E200 Industrial |
$8,980-12,500 |
8-15 |
$12,000-30,000 |
3-6 months |
Revenue estimates based on average U.S. commercial duct cleaning job pricing ($600-1,500 per job). Actual results vary by market.
Step 4: Support, Training, and Spare Parts
A duct cleaning robot is productivity equipment — every day it is not working costs you revenue. Before purchasing, confirm:
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Training: Does the manufacturer provide video training and documentation in your language? Is live remote training available?
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Spare parts availability: How fast do common wear items (brushes, cables, filters) ship? Gaolijie ships parts within 48 hours from factory inventory
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Warranty: What is covered and for how long? 1-year comprehensive is the minimum acceptable standard for professional equipment
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Technical support: Is there an engineer available for video-call diagnostics? When your robot has an issue at 10 PM before a morning job, can you reach someone?
Decision Checklist
- What duct diameters do you clean most often? → Determines robot size range
- Kitchen exhaust, HVAC, or both? → Determines brush type and waterproofing needs
- How many jobs per week? → Determines whether you need a high-speed model (K9) or standard (K7S/CR360)
- What documentation do your clients require? → Determines camera specs
- What is your budget and target payback period? → Determines model tier
Still unsure which robot fits your business? Contact Gaolijie — tell us your typical duct sizes and job types, and an engineer will recommend the right equipment package. Response within 24 hours.
Kitchen Exhaust Cleaning Equipment — Factory Direct
Commercial kitchen exhaust duct cleaning robots built for NFPA 96 compliance. See the equipment that makes restaurant hood cleaning faster and safer.
See how CR360, D2, and D7-5 work together →Request Factory Quote
