Maximizing Comfort in Temporary Units with Exterior Sunshade and Low-Volume Vent Panels

On a high-density construction site, modular temporary units housing engineers and administrative staff were experiencing extreme afternoon heat. Project supervisor Mr. Zhang commented, “Staff were seeking shade and reducing productivity due to heat. We needed a quick, efficient solution that did not disrupt operations.” The team decided to implement an exterior sunshade system paired with low-volume vent panel assemblies to mitigate heat gain and improve airflow.

1. Problem Assessment

The units featured light-gauge metal panels and large west-facing windows. Thermal sensors measured wall surface temperatures peaking at 47°C and internal air temperatures around 34°C. Occupants reported glare and discomfort. Continuous HVAC operation increased energy consumption by 16% compared to baseline units. For similar retrofits in modular units, see Case 3805.

2. Retrofit Design

The solution comprised:

• Aluminium perforated sunshade panels (50% open area) mounted 150 mm from the façade for airflow.

• Low-volume vent panel assemblies at the top of each unit, providing passive exhaust (~0.5 m³/s per unit).

These assemblies maintained modular flexibility, allowing rapid installation. Technical reference: ArchiExpo – Metal Solar Shading Directory.

3. Implementation Story

Installation occurred during night shifts to avoid disrupting site operations. Prefabricated panels and vent assemblies were labeled and staged for each modular unit. Engineer Ms. Li said, “We monitored airflow with anemometers and adjusted louver angles to optimize ventilation.” For comparable projects, see AMICO – Metal Sunshade Facade Projects.

4. Performance Outcomes

Post-retrofit measurements indicated:

• Wall surface temperatures reduced from 47°C to 39°C on average.

• Interior air temperature decreased by 2.7°C during peak hours.

• HVAC energy consumption dropped 13% over one month.

• Occupant comfort complaints fell by 52%; staff reported improved productivity.

For additional comparative data, see ChinaSteelGrating – Sun Shade Panel Applications and Case 3802.

5. Lessons Learned

• Modular retrofits must be lightweight and pre-fabricated for fast installation.

• Sunshade open area and vent panel placement should balance airflow, shading, and aesthetic requirements.

• Post-installation monitoring is critical to verify energy savings and thermal comfort.

• Collaboration among OEM suppliers, contractors, and site management ensures smooth deployment.

6. Call to Action

Are your modular units suffering from overheating or high HVAC costs? Implementing exterior sunshades with low-volume vent panels can enhance comfort, reduce energy usage, and maintain modular flexibility. Contact us today to discuss your retrofit solution.

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