Is a Container House Hot in Summer?

Container houses are not hot in summer; they have good thermal insulation performance, which can effectively reduce the indoor temperature in summer. The specific reasons are as follows:

Thermal Insulation Structure

Container houses are not simply modified; instead, they employ a three-layer key structure to enhance thermal performance:

• Outer anti-corrosion color-coated steel plate: It can reflect sunlight and reduce heat absorption.
• Middle polyurethane foam layer: With a thickness of over 50mm, it can effectively block heat conduction and reduce the heat transfer efficiency.
• Inner fire-resistant gypsum board + moisture-proof film: They work together to control humidity and stabilize temperature, maintaining a stable indoor temperature.

Performance Standards

The national 'Technical Standard for Steel Structure Integrated Houses' clearly requires that the heat transfer coefficient of the walls of residential container houses should be ≤0.45W/(㎡·K), which is 1.8 times the thermal insulation efficiency of traditional brick-and-concrete walls. Measured data shows that in summer at noon, the temperature rise inside the container is 22 minutes slower than that outside. In winter, when closed for 8 hours, the indoor temperature only drops by 1.3℃. This delayed response characteristic makes the body feel more stable, avoiding stuffiness or sudden changes in temperature.

Practical Cases

• A coffee shop in Moganshan uses sandwich panels with aluminum foil reflective layers, equipped with adjustable sunshades and bottom ventilation slots. When exposed to direct sunlight in the afternoon, the indoor environment remains comfortable without the need for air conditioning.
• The temporary construction products selected for the Shijiazhuang subway project have an indoor temperature 4-5℃ lower than that of traditional color-steel houses in summer, and the heating energy consumption in winter is reduced by about 30%. The overall user experience meets expectations.

Optimized Design

Some container houses further enhance their thermal insulation performance through optimized design:

• Use sandwich panels with aluminum foil reflective layers to enhance heat reflection.
• Equip with adjustable sunshades and bottom ventilation slots to promote air circulation and reduce indoor temperature.
• Adopt a double-layer composite wall structure to achieve thermal insulation and effective sound insulation (35-45dB), adapting to humid climates.