Fans & Ventilation Systems
At LH Marthinusen, we deliver world-class fan and ventilation solutions as a trusted Original Equipment Manufacturer (OEM) and full-service partner. With over a century of engineering excellence, our state-of-the-art facilities and expert teams design, manufacture, install, refurbish, and upgrade axial and centrifugal fans from 1 kW to 11 MW — powering critical operations in mining, power generation, industrial processing, and beyond.
We go beyond supplying fans: we engineer complete system performance. Our comprehensive services span the entire value chain — including new installations, efficiency retrofits, reverse engineering, precision balancing, vibration analysis, on-site maintenance, and certified performance testing (including full-speed factory and site testing for auxiliary, main surface, and booster fans). Supported by advanced NDT, corrosion/wear assessments, weld repairs, and custom upgrades, we ensure maximum reliability, energy efficiency, and extended plant life.
Whether it’s a new high-performance fan system, a major refurbishment, or routine condition monitoring, LH Marthinusen partners with you for uninterrupted operations and performance that exceeds expectations
Our Fan Repair & Refurbishment Capabilities
We offer full mechanical, electrical and structural repairs for:
• ID (Induced Draft) and FD (Forced Draft) axial fans used in power stations
• Large centrifugal fan repairs, including full engineering assessments for safety and performance
• Manufacture of new centrifugal fan impellers in an ISO 3834-certified fabrication facility
• Dynamic balancing of rotors and impellers up to 4 m diameter and 20 tons
• Refurbishment of axial auxiliary mining fans and high-duty ventilation systems
• Wear protection and anti-erosion solutions for high-abrasion operating conditions
Complete Fan System Expertise
We are equipped to manage the entire fan package, not only the mechanical restoration.
This includes:
• Transformer and motor interface
• Bearing and coupling assemblies
• Alignment and mechanical reliability checks
• Vibration analysis and condition monitoring
• On-site inspections, testing and commissioning
This ensures each fan system returns to site fully optimised and ready for long-term performance.
OEM-Standard Engineering, Parts Supply & Multi-Brand Repair Capability
Our technicians deliver repairs, upgrades, and component manufacturing to OEM (Original Equipment Manufacturer) standards, supported by specialized training and cutting-edge technology. This ensures every fan system — whether axial, centrifugal, mixed-flow, or a complete industrial ventilation unit — is restored to the highest level of reliability and performance.
Our state-of-the-art facilities and rigorous quality control processes guarantee precision, durability, and consistency in every project. We also provide comprehensive solutions including precision balancing, vibration analysis, performance testing, reverse engineering, and custom fabrication tailored to the specific needs of our clients.
Our engineering capabilities include:
• Reverse-engineering of legacy or obsolete components
• Upgrade recommendations to enhance efficiency and operating life
• Manufacturing of critical parts to OEM specifications
• Engineering studies using finite element analysis (FEA)
Contact us for more information
