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Passive Heating Through Thermal Mass with Integrated Greenhouse Solutions

Author:
Anna Wójcik
Passive Heating Through Thermal Mass with Integrated Greenhouse Solutions
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Harnessing passive heating through an integrated greenhouse and thermal mass, the design prioritizes self-sufficiency and energy efficiency for sustainable living.
5 key facts about this project
01
Integrated greenhouse facilitates year-round food production.
02
Dual-panel system enhances energy self-sufficiency.
03
Rainwater collection system supports sustainability.
04
Modular construction allows for efficient assembly and adaptation.
05
Single-level design promotes accessibility for all residents.

The Sun-Catcher House represents a thoughtful approach to sustainable living through its architectural design. It is designed to function efficiently in diverse settings, whether in a remote natural landscape or an urban environment. The home focuses on reducing dependence on external resources while promoting self-sufficiency through various passive systems for heating, cooling, and water management.

Integrated Greenhouse

A key feature of the design is the integrated greenhouse, which plays an important role throughout the year. In winter, the greenhouse collects solar heat and distributes it throughout the living spaces using a system of convection and thermal mass storage. This design reduces the need for additional heating. In the summer, the greenhouse enhances ventilation naturally, promoting a comfortable indoor climate. The internal doors remain open on cooler days, creating a spatial connection between indoor and outdoor areas that increases livability.

Energy Efficiency

Energy efficiency is a central element of the house. The roof has a dual-panel system on its south slope, consisting of three solar panels for heating water and three photovoltaic panels for generating electricity. This setup allows the house to produce most of its energy needs, decreasing its reliance on non-renewable energy sources.

Water Management

Effective water management is also a crucial aspect of the house. Rainwater is collected from the north side of the roof and directed into a storage tank. This water is then heated by an external heater located in a well-placed technical room. Such a system facilitates efficient water usage, enabling occupants to maintain daily functions without relying on municipal water supply.

Structural Modularity

The design employs a modular construction approach, enhancing both efficiency and adaptability. The house consists of eight modules that act as roof rafters and wall studs, arranged at regular 60 cm intervals. This modularity simplifies construction while providing flexibility in design. Living spaces are all on a single level, making them accessible for people of all ages and abilities.

Hidden storage spaces are integrated both inside and outside the home, promoting organization and efficiency. An accessible technical room houses essential systems, encouraging easy maintenance.

Overall, the Sun-Catcher House exemplifies practical design, focusing on sustainability while ensuring comfort and usability for its residents through its various features.

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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.

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

100,000€ Prize / 2025 ideas COMPETITION
Prize 100,000 €
Eligibility Open to all
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