The Practical Benefits of Excavator Window Tinting: A Test and Analysis

[MikePhua]

During the hot summer months, especially in cities like Beijing where temperatures can reach 40°C, excavator operators face immense pressure to work under the scorching sun. As the heat intensifies, the topic of window tinting for excavators often arises, sparking debates among equipment owners. Proponents argue that window tinting helps reduce heat and eases the strain on air conditioning, while opponents claim it may hinder visibility, particularly during nighttime operations. To shed light on this debate, we conducted a comprehensive test to evaluate the actual benefits of excavator window tinting.
The Test Setup
To thoroughly assess the impact of window tinting, we partnered with Li Hongliang, a seasoned excavator operator in Hebei Xianghe, who owns two Caterpillar 306E excavators. One of the machines had window tint applied, while the other remained untinted. This allowed us to compare the performance of both machines under similar conditions.
Selecting the Right Film
Before we started the tinting process, we sought advice from a professional shop on how to select the right window film. They shared several methods to assess film quality, which we categorized as follows:

1. Look
   High-quality window film offers excellent clarity and transparency, typically over 90%. The color of the film does not significantly affect visibility, even in low-light conditions. In contrast, low-quality films often have a cloudy appearance, especially noticeable at night or during rain.
   
2. Smell
   Premium films use non-toxic adhesives that are odorless. Low-quality films, on the other hand, often have strong, unpleasant odors due to high levels of solvents like benzene, which can be harmful to health.
   
3. Touch
   High-quality films feel thick and smooth, while inferior films are thin, flimsy, and prone to wrinkling.
   
4. Look Again
   A good film will be bubble-free and smooth. Poor films tend to form tiny bubbles and wrinkles due to impurities in the adhesive.
   

After choosing the right film, we also learned some additional tips from the supplier, such as using a fingernail to scratch the film (low-quality films will lose color), and that the tint’s heat resistance depends on the thermal layer, not the color layer.
The Tinting Process
Before applying the film, it is crucial to prepare the vehicle properly. Measuring the window area ensures that enough film is purchased to avoid waste. Additionally, it’s best to apply window tint on cloudy days or after rain, as this minimizes dust and floating particles that can create bubbles. Applying the tint under direct sunlight can cause the film to wrinkle or bubble, negatively affecting its appearance and performance.
Post-Tinting Testing
We conducted temperature and light intensity tests on both the tinted and untinted excavators from 12 PM to 2 PM, the hottest part of the day. The outdoor temperature during testing was 30°C.

1. Untinted Excavator Test
   • Seat headrest temperature before exposure: 44.3°C
     
   • Outdoor sunlight intensity: 647W/㎡
     
   • Light intensity through the window: 514W/㎡
     
   • Seat headrest temperature after 30 minutes of exposure: 49.4°C
     
2. Tinted Excavator Test
   • Seat headrest temperature before exposure: 36.6°C
     
   • Outdoor sunlight intensity: 665W/㎡
     
   • Light intensity through the window: 225W/㎡
     
   • Seat headrest temperature after 30 minutes of exposure: 47.7°C
     

Results Analysis
The test results clearly show that the tinted excavator experienced a significant reduction in light intensity. The light passing through the tinted window was reduced by 440W/㎡, much lower than the untinted machine. After 30 minutes of exposure, the seat headrest temperature in the tinted excavator was 1.7°C lower than the untinted one, demonstrating the tangible heat reduction benefit of window tinting.
Operator Feedback
We also interviewed Li Hongliang, the operator, to get his perspective on the use of tinted windows for excavators. He mentioned that tinting noticeably reduces the strain on the air conditioning system, helping it cool the cabin faster and more efficiently, leading to lower fuel consumption. Additionally, he observed that tinted windows reduce glare, making it easier on the eyes and improving comfort during long shifts. As for nighttime operations, he assured us that good lighting from the headlights compensates for any minor loss of visibility caused by the tint.
Conclusion
From our tests and operator feedback, it is clear that window tinting for excavators provides several benefits. Not only does it help in heat reduction, but it also reduces the workload on air conditioning, improving fuel efficiency. Additionally, it minimizes glare, enhancing comfort during the day. Although the temperature difference may seem small (1.7°C), this shows that tinting does have a noticeable effect on slowing down the cabin's temperature rise. Given the benefits, especially during long hours under the sun, window tinting is indeed a worthwhile investment for excavators.