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

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Competition organisers

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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Design the next suburban home for the USA

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