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Rainwater-Collecting Home With Hydroponic Garden and Recycled Elements

Authors:
Li kuang Pung, Yue Mao, Jie lyn Koh
Rainwater-Collecting Home With Hydroponic Garden and Recycled Elements

Project in-detail

With a Trombe wall for thermal mass and a hydroponic garden integrated into its structure, this home utilizes recycled materials and rainwater collection to create a self-sufficient living environment.
5 key facts about this project
01
Rainwater is collected through a curved roof designed for optimal surface area.
02
Greywater is treated and reused in a filtration zone with plant integration.
03
A hydroponic garden is featured on the exterior, promoting food production.
04
The design includes a Trombe wall for passive solar heating and thermal mass.
05
Recycled construction materials are utilized to minimize environmental impact.

Shelter is a carefully designed home that addresses important environmental issues. Located in an area where resource scarcity is becoming more prominent, the dwelling prioritizes sustainability and self-sufficiency. It aims to establish a strong connection between its residents and the natural surroundings. The design emphasizes essential needs such as water and food, creating a living environment that encourages a lifestyle in harmony with nature.

Water Management

The design features a curved roof and slanted walls to effectively collect rainwater, which is stored in an underground tank for use in showers and washing. Greywater from these activities is redirected to a filtration area that includes plants behind a Trombe wall, enhancing water reuse by sending treated water back to the toilet. This integrated system also manages blackwater, with sewage processed at a central drain field designed to enrich the local soil and support farming endeavors.

Food Production

The home includes raised ground along the eastern side that functions as a garden bed for growing crops. This design element makes use of recycled construction materials and only a small amount of topsoil, aligning with principles of minimal waste. Additionally, the exterior features screens that allow for hydroponic gardening, offering an alternative means of food production while contributing to the overall ecological impact of the structure.

Energy Generation

Solar panels are positioned on the roof and curved facade. These panels help lessen reliance on traditional energy sources and aim to decrease the building's carbon footprint. The design also incorporates passive thermal controls, which improve energy efficiency. This approach makes it possible for the interior to remain comfortable without overusing heating or cooling systems.

Thermal Regulation

A Trombe wall with considerable thermal mass is located on the western side of the building to collect and hold solar heat during the day. This design keeps the upper living spaces warm at night. Insulating practices on the eastern wall also help maintain a comfortable temperature. Additional ventilation strategies, including vents along the retaining wall and operable skylights, help promote natural cooling, adding to the home’s energy efficiency.

These thoughtful design features create a living space that represents a step toward sustainable living. The careful selection of materials, including recycled construction waste and the planning of gardens, highlights a practical approach that serves both functionality and environmental goals. The result is a home that embodies a commitment to balance and resource management.

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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

Enter an open architecture
competition now

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