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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 Next House: USA — A Global Call to Reimagine the American Suburb

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Buildner is launching The Next House: USA, a global architecture competition that challenges architects, designers, and thinkers to reimagine the American suburban home for the 21st century. For decades, the suburban house has symbolized comfort and stability, but today it often reflects excess, isolation, and environmental strain. This competition asks: how can the American home evolve to address climate urgency, economic pressures, and shifting social values?

Participants are tasked with designing a prototype home of no more than 1,500 sq ft (≈140 m²) for a household of two adults and one child. The design should be compact yet generous, adaptable, sustainable, affordable, and replicable across diverse U.S. contexts. More than a design exercise, the competition aims to spark a conversation about how homes can support healthier, smarter, and more connected communities.

The total prize fund is $20,000 USD. The final registration deadline is May 20, 2026, and winners will be announced on September 22, 2026. The Next House: USA invites architects, students, and visionaries worldwide to redefine what the American home means today—and what it should mean tomorrow.

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