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Natural Ventilation and Greywater Management in a Hillside Retreat

Authors:
Lauren Martino, Michael Vergalla
Natural Ventilation and Greywater Management in a Hillside Retreat
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Aligned with the winter solstice sunset, the Oculus serves as a central core that enhances natural ventilation and integrates greywater management, creating a sustainable retreat for wellness and reflection.
5 key facts about this project
01
The Oculus aligns with the winter solstice sunset for enhanced natural lighting.
02
Operable window panels promote passive ventilation in the yoga shala.
03
A greywater reuse system is integrated for sustainable water management.
04
Small carved nooks on the sunrise deck provide spaces for quiet reflection.
05
An amphitheater connects the upper and lower sunset decks for community gatherings.

The Vale de Moses Solstice House is located on a steep hillside, designed to work in harmony with its natural surroundings. It serves as a retreat for reflection and community, inviting visitors to connect with nature. The design focuses on a central core called the Oculus, which organizes space and movement, encouraging a relationship between occupants, their activities, and the environment.

Design Concept

The layout emphasizes a balance between private and communal spaces. The central Oculus serves as the main circulation hub, with key areas such as the yoga shala, bathrooms, and kitchen radiating outward. Each space is thoughtfully oriented to enhance light and views, creating an atmosphere conducive to mindfulness and relaxation. The placement of sunrise and sunset decks encourages a deeper connection to the daily rhythm of the sun, fostering engagement with the changing landscape.

Spatial Configuration

The yoga shala is particularly significant in its placement and design. It captures natural light effectively, enhancing the experience of physical and mental well-being. Small, carved nooks on the sunrise deck provide intimate spaces for quiet reflection. These areas offer opportunities for users to find moments of solitude, connecting them to the hillside and its natural beauty.

Sustainability and Efficiency

Energy and water management are central to the design, emphasizing sustainability. The use of on-demand propane water heaters allows for efficient hot water supply, while a grey water reuse filter pack addresses irrigation needs. A solar panel array paired with a battery storage system ensures that energy consumption is minimized, reflecting a commitment to environmentally-friendly practices.

Design Detail

The yoga shala features operable window panels that promote natural ventilation by releasing hot air during warmer months. A small window in the Oculus is aligned with the winter solstice sunset, creating a meaningful link to the passage of time. This thoughtful detail enriches the experience within the building and reinforces the connection between architecture and the changing seasons.

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Affordable Housing Series 19th Edition
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MICROHOME 10: Celebrating Small-Scale Living with €100,000 Prize Fund and Kingspan’s Innovation

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Competition organisers

The MICROHOME 10 competition invites participants to submit visionary designs for off-grid, modular microhomes that push the limits of sustainable, small-scale living. Organised by Buildner in partnership with Kingspan and Hapi Homes, this tenth edition sets the challenge of designing a dwelling for two people within a maximum floor area of 25 m², encouraging bold solutions adaptable to any urban or rural location. The competition continues Buildner’s mission to foster innovative approaches to compact, energy-efficient housing that can address pressing global challenges.

This year’s edition offers a generous total prize fund of €100,000, including the Kingspan Award for designs that integrate high-performance Kingspan products and the Hapi Homes Award for a project selected for real-world construction. In addition to cash prizes, the winners gain international exposure through Buildner’s media partnerships, publications, and a dedicated MICROHOME magazine, further amplifying their ideas to the wider architectural community.

Key dates for MICROHOME 10 include the closing date for registration on 25 September 2025, the submission deadline on 29 October 2025 (11:59 p.m. London time), and the announcement of winners on 9 December 2025. These milestones ensure participants have clear timelines to develop and present their concepts, with early registration discounts available to support students and emerging designers worldwide.

MICROHOME

Design a new small-scale home concept in the 10th edition of MICROHOME — 100,000 € prize + construction

100,000 € Prize Fund / Kingpsan Edition #10 ideas COMPETITION
Prize 100,000 € + Potential realisation
Eligibility Open to all
Final registration deadline 25 September 2025

Open architecture competitions

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    Experimental competitions with the focus on pushing the boundaries of creativity
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Prize Monetary award
Eligibility Open to all
Final registration deadline 18 September 2025

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