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Rainwater-Collecting Home with Recycled Metal and Ventilated Facade

Author:
Jovana Dmitrić
Rainwater-Collecting Home with Recycled Metal and Ventilated Facade
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Utilizing a ventilated facade and recycled metal, the residence seamlessly integrates rainwater harvesting and geothermal energy systems to create an efficient living space for two.
5 key facts about this project
01
Utilizes a modular design with standardized components to minimize waste.
02
Incorporates a rainwater harvesting system for efficient water management.
03
Features a ventilated facade that enhances thermal performance and air circulation.
04
Employs geothermal energy for efficient temperature regulation throughout the year.
05
Integrates recycled metal as a key structural element to promote sustainability.

The design features a compact residence intended for two people, with a total building area of 25 square meters and a usable space of 19 square meters. Positioned in either an urban setting or a natural landscape, the house emphasizes ecological principles while providing functional living space. The overall design includes a ventilated facade, which improves thermal regulation and promotes a connection to the surroundings.

Building Concept

The house is constructed using low environmental impact materials, which play a significant role in promoting sustainability. Key materials include wood, stone, clay, and recycled metal for structural support. These materials are intentionally left in their natural state, helping to minimize volatile organic compounds (VOCs) and ensuring a healthier indoor atmosphere. A modular design approach with standardized components, each measuring 60 cm, allows for adaptability to the residents' changing needs while reducing waste during construction.

Energy Efficiency

A central focus of the design is energy efficiency, incorporating both passive and active systems that enhance performance. The geothermal energy system regulates indoor temperatures by utilizing stable underground temperatures, which cuts down on reliance on conventional energy sources. Cross-ventilation strategies are achieved through roof windows, promoting natural air circulation and thermal comfort. Additionally, the building’s east-west orientation maximizes solar exposure, improving energy performance and providing ample natural light to living spaces.

Water Management

The project includes a rainwater harvesting system designed to collect and store water for household use, especially for washing machines. This approach highlights efficient resource management while staying true to the aesthetic concerns of the residence. Cisterns are built into the facade and feature a double thermal wall to reduce heat loss and protect the water from contamination, further emphasizing the commitment to sustainability.

Renewable Energy Integration

Photovoltaic solar panels are installed on the roof to convert solar energy into electricity and thermal energy for heating water. This integration supports the building’s functionality and reduces environmental impact. The careful planning of these energy features is a key aspect of the design, enhancing overall efficiency while maintaining a balance with the outdoor environment.

The design integrates features that provide a connection between indoor and outdoor spaces, paying attention to natural light and ventilation. This thoughtful approach ensures a practical and sustainable living space that aligns with contemporary ecological architectural principles.

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The Buildner’s Unbuilt Award 2025: Celebrating Architectural Creativity and Visionary Unbuilt Designs with a Total Prize Fund of €100,000

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Competition organisers

The Buildner’s Unbuilt Award 2025 is an international architecture competition dedicated to recognizing and celebrating the value of unrealized architectural designs. It invites architects, designers, and students worldwide to submit visionary projects that have not yet been constructed, highlighting the power of ideas and the creativity behind the design process. By focusing on unbuilt work, the competition aims to bring forward concepts that shape the future of architecture and push the boundaries of the profession. 

Participants can compete in three categories based on project scale: Small Wonders (up to 100 m²), Medium Marvels (101–999 m²), and Large Visions (over 1,000 m²). Each category winner will receive €20,000, and additional prizes include honorable mentions, student awards, and a special Best Presentation Award. Winning projects will gain significant international exposure through Buildner’s publicity campaign and a feature article on ArchDaily, providing a unique opportunity to showcase creative ideas to a global audience. 

The Buildner’s Unbuilt Award 2025 encourages entrants to submit any type of unbuilt project, from conceptual visions to detailed designs, celebrating bold innovation without the constraints of realization. Important deadlines: registration closes on October 30, 2025; submissions are due by November 20, 2025; winners will be announced on December 17, 2025.

Buildner's Unbuilt Award 2025

Celebrating your unbuilt architecture visions with a €100,000 prize

100,000€ Prize / 2025 ideas COMPETITION
Prize 100,000 €
Eligibility Open to all
Final registration deadline 30 October 2025

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