Top HVAC duct cleaning robots include Teinnova Multibot (Spain), Lifa Air DuctCleaner (Finland), and Danduct Clean (Denmark). Multibot is a modular crawler system supporting heavy-duty cleaning, sealing, and disinfection. Lifa Air features high-torque electric/pneumatic brush systems designed for precision duct cleaning. Danduct Clean focuses on simple, rugged inspection and light cleaning. Key differences include drive system, modularity, camera systems, operational reach, and their suitability for commercial HVAC cleaning environments.

A Teinnova Multibot base robot typically costs USD 18,000 to 22,000. A full Multibot set ranges from USD 28,000 to 35,000 and includes the crawler platform, control unit, HEPA vacuum integration, compressor connections, and standard brush modules. Competitors like Lifa Air DuctCleaner cost about USD 20,000 to 24,000, while basic inspection robots range from USD 4,000 to 8,000.

For ducts under 300 mm, recommended systems include: Lifa Air Special Cleaner 20 PE (100–400 mm), which uses a flexible rotating brush shaft ideal for bends; Teinnova Multibot MICRO (250–500 mm), a mini crawler platform with video capability; and budget-friendly rotary shaft systems such as Rotobrush for 100–300 mm ducts.

Daily maintenance includes blowing out motor vents, inspecting cables for cuts or exposed wires, checking gasket seals, and cleaning wheels or tracks. Recommended spare parts include nylon and steel brushes, spare wheels or tracks, O-rings for module connections, resettable fuses, and replacement sapphire camera lens covers.

Relevant standards include NADCA ACR for duct cleaning quality, CE marking for European electrical compliance, UL or ETL certification for power safety, NFPA 96 requirements for grease duct cleaning, and IP65 or higher ingress protection for dust and water resistance.

The Multibot base platform measures 320 × 200 × 250 mm with 4×4 traction and a 30-degree climbing capability. It includes an elevation arm for ducts 400–1000 mm. Module B360 provides 555 RPM cleaning rotation and perimeter motion for rectangular ducts. Module S360 is an airless spray sealing head using dual rotating nozzles. Module D360 provides 20-micron fogging for disinfection after cleaning.

Teinnova Multibot offers high modular versatility, enabling cleaning, sealing, and disinfection through interchangeable heads. It uses perimeter cleaning logic suitable for square ducts and features a touchscreen interface. Lifa Air systems prioritize high-torque brush cleaning, especially for round ducts, with rugged joystick controls and electric or hydraulic drive options.

In India, HVAC robots can be sourced from Robosoft Systems (Mumbai), Pureduct Services Pvt Ltd (authorized distributor for Lifa Air), direct import from Teinnova Spain, Milagrow Robotics, and B2B platforms such as Indiamart and TradeIndia for regional HVAC cleaning equipment suppliers.

The S360 module supports encapsulating sealants like Foster 40-20, water-based duct sealants such as Elasbio, and fire-retardant coatings or intumescent paints. It is not compatible with thick foam insulation, as it is engineered for micro to millimeter-level surface coatings.

For greasy ductwork, recommended brushes include PBT bristles for medium grease, mixed nylon-steel brushes for hardened carbonized grease, and fat-duct brushes with wide bristle spacing to avoid clogging. Steel brushes should never be used on flexible or aluminum foil ducts; PBT is recommended for those materials.