Compare approaches and discover why MB Group's natural ventilation outperforms exhaust fans and improvised openings in industrial retrofits.
The fight against heat on the factory floor
High temperatures in industrial environments are one of the main enemies of productivity. Metal warehouses, with little ventilation and high solar incidence, accumulate excessive heat and generate thermal discomfort for the teams, in addition to increasing the costs of artificial air conditioning.
Many managers look for short-term solutions, such asindustrial exhaust fans and improvised openings. But these options, in addition to being unstable and inefficient, generaterecurring maintenance, noiseand poor performance in large industrial environments.
In this article, you will understandwhy these approaches compromise actual performanceand how systemsnatural ventilation with MB Lanterns and Venetian blindsprove to be the definitive solution forindustrial retrofit.
What compromises the performance of industrial ventilation
Wind Exhaust Fans

These are popular but outdated solutions. Even the most modern models of hoods have severe limitations in large environments or with a more closed layout.
Main disadvantages:
- Dependence on external wind (wind) → unstable performance;
- Low air renewal capacity in warehouses with high ceilings;
- Constant noise, which affects listening comfort;
- Moving parts that require frequent maintenance;
- Difficulty adapting to warehouses with controlled atmosphere.
Improvised openings

Often seen in old warehouses, these “workarounds” for air entry and exit end up being sources of problems.
Common problems:
- Entry of rain, dust and even birds;
- Lack of air flow control;
- Compromised aesthetics;
- Risk to the building's sealing and internal thermal control.
What really delivers results: MB Lanterns and Venetian blinds

Efficient industrial ventilation starts withapplied engineering, and not with improvisation. The system ofMB Groupcombines two key elements:
- MB Lantern
Installed on the ridge, it allows the continuous exit of hot air by natural thermal convection (chimney effect). The aerodynamic geometry enhances this flow with the venturi effect. - MB shutters
Installed on the sides of the warehouse, they guarantee the entry of fresh air and createcontinuous cross ventilation, without energy consumption.
Proven benefits:
- Zero electrical consumption;
- Zero noise;
- No moving parts;
- Perfect sealing against infiltration;
- Projects validated withCFD simulation;
- Customization according to plant layout.
Technical Comparison: Exhaust fan x Lanternim MB
| Criterion | Exhaust fans | MB Venetian Lanterns |
| Efficiency in large warehouses | Low | Bullish (validated by CFD) |
| Power consumption | High (mechanical) / Zero (wind) | Zero |
| Maintenance | Frequent, moving parts subject to failure | Minimal, no moving parts |
| Noise | High | Null |
| Sealing | Precarious | High, with pest protection screens |
| Durability | Average (up to 5 years) | High (10 years) |
| Aesthetics and engineering | Poor, improvised appearance | Technical design with superior finishing |
Retrofit with natural ventilation: more intelligence, less cost
When choosingMB Lanterns and Shutters, your factory can transform the environment without needing air conditioners or air conditioning.
Main advantages for industrial retrofit:
- Execution without stopping the operation;
- Lower initial investment than artificial air conditioning;
- Phased application, according to priority areas;
- Reduction of internal temperature between 5°C and 8°C;
- Increased productivity and comfort of employees;
- Alignment with ESG guidelines and environmental certifications.
Real case: MGVAgroindustrial

Located in Campina Verde (MG), MGV faced intense thermal challenges in its warehouses.
After partnership with Grupo MB:
- Installation ofFlashlight MB1205 e MBF100 shutters;
- Reduction of internal temperature and improvement in comfort;
- Optimizing airflow withnatural cross ventilation;
- Quiet operation and no need for recurring maintenance.
Performance that transforms the industrial environment
While makeshift exhaust fans and vents seem like simple solutions, they fail where it matters most:continuous efficiency, durability, savings and sustainability.
The systemMB Venetian Lanternoffers:
- Proven thermal efficiency;
- Real energy savings;
- More health and comfort on the factory floor;
- Less maintenance, more performance;
- Modernization without new work.
Your factory still suffers from excessive heat, unproductiveness and high artificial ventilation costs
Talk to a MB Group specialist now and find out how to transform your warehouse with a smart retrofit.


