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Natural Water Harvesting and Cross Ventilation in a Modular Retreat Home

Authors:
Dumitru Ana, Raluca Negoescu, Ruxandra Chirca, Oana Gavrila
Natural Water Harvesting and Cross Ventilation in a Modular Retreat Home
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With a focus on natural water harvesting and cross ventilation, the design integrates a ventilated wooden façade and rigid rock wool insulation to create a sustainable modular space for contemplation and retreat.
5 key facts about this project
01
Modular design with four transportable components.
02
Incorporates rainwater harvesting for sustainable water management.
03
Cross ventilation strategy enhances natural airflow and indoor comfort.
04
Ventilated wooden façade improves insulation and aesthetic appeal.
05
Tailored for specific climates in Austria, Poland, and Romania.

The RETREAT HOME project offers a modular dwelling designed for individuals seeking a peaceful space away from their daily lives. Located in temperate continental climates in places like Zell am See, Austria; Zakopane, Poland; and Cavnic, Romania, the house aims to blend comfort, sustainability, and functionality. The design emphasizes a user-focused environment while addressing the unique climatic challenges of these rural and semi-urban areas.

Modular Configuration

The structure is organized into distinct areas meant for daytime and nighttime use. This clear division allows for effective space utilization and meets varied needs. The core design consists of a volumetric module made up of four main parts, which simplifies transportation and assembly on-site. This modular approach supports quick and efficient construction, with a focus on maintaining a cohesive design.

Sustainability Features

Sustainability is woven into the project's design. A key feature is cross ventilation, which uses natural airflow to keep indoor spaces comfortable without relying solely on mechanical systems. Fresh air from outside enters the building, while warmer air rises and escapes through higher openings. This approach helps to regulate temperature and improve overall indoor conditions.

Energy Efficiency and Resource Management

Energy systems are a significant aspect of the design. Solar and photovoltaic panels generate electricity and heat by capturing sunlight, promoting energy self-sufficiency. Additionally, a rainwater harvesting system gathers water from the roof and directs it to storage tanks for later use. This system reflects a commitment to responsible management of water resources.

Material Selection

Materials play an important role in the build quality and performance of the house. The exterior features a ventilated wooden façade, complemented by OSB board and wooden vertical mullions. Rigid rock wool provides thermal insulation. Other components include high-performance insulating boards and vapor barrier sheets that together enhance energy efficiency. Fireproof plasterboard ensures safety, while aluminum profiles and façade overhangs provide a practical yet appealing finish.

RETREAT HOME combines modern design principles and sustainable practices, focusing on the needs of its occupants and responding to its environmental context. The arrangement of spaces promotes a connection to nature, facilitating a harmonious interaction between the home and its surroundings.

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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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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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