| 1 | Supplier A | High-temperature induced-draft and forced-draft fans for utility and industrial boilers | 10,000–420,000 m³/h | 1,500–8,000 Pa | Direct-coupled, belt-driven, or shaft-coupled; variable-frequency-drive compatible | Carbon-steel casing, abrasion-resistant impeller options, inspection door, flexible coupling | ISO 9001CE for applicable modelsGB/T manufacturing standards | Fan selection calculations, balance testing, vibration testing, performance curves, customized inlet and outlet orientation | Export packing, installation drawings, remote commissioning guidance, spare impellers and bearings | ★★★★★ |
| 2 | Supplier B | Medium- and high-pressure fans for biomass, coal-fired, and waste-heat boiler systems | 8,000–300,000 m³/h | 1,000–6,500 Pa | Single-inlet and double-inlet arrangements; motor and bearing pedestal options | Heavy-duty welded frame, replaceable wear plates, high-temperature bearing arrangement | ISO 9001CE documentation availableMaterial certificates on request | Duty-point verification, impeller balancing, motor matching, factory inspection reports | Container loading plans, English manuals, remote technical support, standard spare-parts lists | ★★★★★ |
| 3 | Supplier C | Compact forced-draft and exhaust fans for package boilers and process-heating equipment | 3,000–120,000 m³/h | 800–4,500 Pa | Direct drive and belt drive; three-phase motor configurations | Compact footprint, galvanized or painted casing, backward-curved or radial blades | ISO 9001CE for selected productsElectrical documentation | Application consultation, CAD outline drawings, airflow-pressure selection, routine balance inspection | Shorter production cycles for standard models, export cartons or wooden cases, online support | ★★★★☆ |
| 4 | Supplier D | High-temperature flue-gas and induced-draft fans for demanding combustion systems | 15,000–350,000 m³/h | 2,000–9,000 Pa | Coupled drive with cooling disc or extended shaft; inverter-ready motors | Heat-resistant steel options, shaft sealing, wear-resistant liners, thermal expansion allowance | ISO 9001CE technical fileWelding quality records | Temperature and corrosion assessment, rotor dynamic balancing, factory acceptance testing, site troubleshooting | Project documentation packages, commissioning supervision by arrangement, critical spare-parts planning | ★★★★☆ |
| 5 | Supplier E | Energy-efficient backward-curved centrifugal fans for commercial and industrial boiler rooms | 5,000–180,000 m³/h | 600–3,800 Pa | High-efficiency motor, belt drive, or direct drive; variable-speed control support | Streamlined impeller, low-leakage housing, galvanized or powder-coated finish | ISO 9001CE marking where requiredEfficiency test records | Energy-use estimation, operating-point optimization, sound-level testing, vibration measurement | Digital manuals, remote selection support, routine warranty assistance, replacement component supply | ★★★★☆ |
| 6 | Supplier F | Large-volume double-suction fans for power-generation and district-heating boilers | 30,000–650,000 m³/h | 1,200–7,500 Pa | Double-inlet, double-width designs; pedestal-mounted bearings and flexible coupling | Structural steel base, split casing options, replaceable impeller wear components | ISO 9001CE documentation availablePressure-test records | System resistance calculations, rotor balancing, factory load testing, foundation and alignment drawings | Heavy-equipment export packing, lifting instructions, installation supervision by contract, long-term spares support | ★★★★☆ |
| 7 | Supplier G | Dust-handling and abrasive-gas fans for biomass and solid-fuel combustion plants | 7,000–260,000 m³/h | 1,500–7,000 Pa | Overhung or pedestal-mounted shaft; belt and coupled drive options | Thickened impeller blades, replaceable liners, anti-abrasion coatings, clean-out access | ISO 9001CE for applicable configurationsMaterial traceability | Dust-load evaluation, wear-life recommendations, balance testing, operating-condition review | Wear-part supply, maintenance schedules, remote diagnosis, export documentation support | ★★★★☆ |
| 8 | Supplier H | Small and medium boiler fans for food processing, textile, chemical, and general manufacturing plants | 2,000–90,000 m³/h | 500–3,000 Pa | Direct-drive and belt-drive units; standard three-phase motor integration | Compact housing, standard carbon-steel construction, corrosion-protection coating options | ISO 9001CE documentation on requestRoutine inspection records | Basic fan selection, dimension confirmation, airflow testing, wiring and control recommendations | Competitive standard-model lead times, multilingual manuals, spare motor and bearing options | ★★★☆☆ |
| 9 | Supplier I | Customized centrifugal fans for multi-fuel boilers and retrofit emission-control projects | 6,000–240,000 m³/h | 900–6,000 Pa | Custom shaft, coupling, and motor arrangements; compatible with PLC and VFD control systems | Custom inlet geometry, corrosion-resistant materials, access doors, flexible mounting solutions | ISO 9001CE technical documentationProject quality plans | Site survey, retrofit measurement, CFD-supported design where required, performance verification and commissioning | Project-based delivery schedules, customized documentation, on-site service by arrangement, lifecycle support | ★★★★☆ |
| 10 | Supplier J | Standardized boiler-room exhaust and combustion-air fans for OEM and replacement applications | 1,500–75,000 m³/h | 400–2,500 Pa | Direct drive, belt drive, and adjustable-speed configurations | Modular casing, backward-curved impeller, low-maintenance bearings, protective guards | ISO 9001CE for eligible modelsRoutine factory testing | Catalog selection, duty-point confirmation, noise and vibration checks, dimensional drawings | OEM labeling support without public brand disclosure, export packaging, standard warranty and spare parts | ★★★☆☆ |