Ecological Prefabricated Housing Design Specifications

Currently, there is no unified standard directly targeting the 'Ecological Prefabricated Housing Design Specifications'. However, general requirements from relevant ecological residential design specifications can be referenced, and designs can be tailored in combination with the characteristics of prefabricated housing.

I. Site and Planning Requirements According to the 'Technical Requirements for Environmental Labeling Products - Ecological Residences (Residential Areas)' (HJ/T 351-2007), site planning should emphasize ecological protection, avoiding damage to the original topography and landforms. It should reasonably arrange buildings and green spaces to ensure good sunlight and ventilation conditions. Additionally, it should integrate the site design requirements from the 'Green Building Design Standard' (DB32/3962—2020) to optimize traffic flow, reduce hard paving, increase the proportion of permeable ground surfaces, enhance rainwater infiltration capacity, and mitigate the heat island effect.

II. Building Body Design

1. Energy Efficiency and Energy Utilization: Referring to the 'Technical Requirements for Environmental Labeling Products', buildings should adopt high-efficiency thermal insulation materials to optimize the thermal performance of the building envelope and reduce energy consumption. Prefabricated housing can incorporate modular design, enabling rapid assembly through standardized components and reducing construction energy consumption.
2. Indoor Environmental Quality: It should meet the natural lighting and ventilation requirements in the 'Green Building Design Standard'. Windows should be reasonably designed in terms of area and orientation to ensure indoor air quality. Prefabricated housing can adopt integrated design, reserving ventilation ducts or fresh air system interfaces to enhance living comfort.
3. Structural Safety and Durability: According to the 'Green Design Specification Standard for Civil Buildings' (2023 Local Revision Draft for Solicitation of Comments), structural design should comply with seismic and wind resistance requirements. The connection nodes of prefabricated components should be reliable to ensure overall stability. Meanwhile, material selection should focus on durability to reduce later maintenance costs.

III. Resource and Material Utilization

1. Material Selection: Priority should be given to renewable and recyclable materials, such as bamboo and recycled concrete, to reduce environmental impact. Prefabricated housing can adopt an industrial production model to improve material utilization and reduce waste generation.
2. Water Resource Management: Referring to the 'Technical Requirements for Environmental Labeling Products', rainwater collection and reclaimed water reuse systems should be designed for green irrigation or toilet flushing, reducing dependence on municipal water supplies. Prefabricated housing can integrate water-saving fixtures, such as low-flow faucets and water-saving toilets.

IV. Ecological Landscape and Greening Combining the 'Design Requirements for Three-Dimensional Ecological Residential Buildings in the Central Urban Area of Longyan City (Trial)', prefabricated housing can be designed with sky gardens or vertical greening to increase green space and improve the microclimate. Greening design should consider waterproofing and drainage issues to avoid damage to the building structure.