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Twisting Air Shaft Enhances Passive Cooling in Rammed Earth Residence

Author:
Nk3 Architects Nk3 Architects
Twisting Air Shaft Enhances Passive Cooling in Rammed Earth Residence
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The twisting air shaft captures cooling breezes while facilitating rainwater harvesting in a rammed earth residence designed for two young doctors serving their rural community.
5 key facts about this project
01
The design incorporates a two-storey twisting air shaft for enhanced ventilation.
02
Rammed earth construction promotes natural insulation and thermal stability.
03
Rainwater collection is integrated into the architecture for resource efficiency.
04
Large openings allow for ample natural light and airflow throughout the home.
05
The layout emphasizes community interaction while maintaining privacy for residents.

The COOLHOUSE is a residential design situated in rural India, addressing the issue of housing shortages as many young professionals leave their hometowns for urban jobs. Designed for a pair of young doctors, the building aims to create a comfortable living space that encourages a return to community life. Its modern approach is blended with elements from traditional Indian architecture, reflecting the local culture while meeting contemporary demands.

Design Concept

The design focuses on the unique challenges faced by rural communities, offering a fresh perspective on how homes can function in these environments. The wind tower plays a key role in this concept, providing passive cooling and maintaining air circulation. This element not only serves a practical purpose but also connects the structure to its architectural roots, reminding residents of their heritage.

Sustainability Features

Sustainability is at the heart of the COOLHOUSE. The wind tower contributes to passive cooling, which is crucial in hot areas like Sri Ganganagar and Jhansi. The design incorporates rainwater harvesting and the collection of morning dew, ensuring efficient water use. These features work together to create a dwelling that minimizes its environmental footprint while maximizing comfort.

Materials and Construction

The choice of materials reflects an emphasis on local resources. Rammed earth, clay bricks, and timber are carefully selected to create a building that is both practical and aesthetically pleasing. This selection aids in regulating temperature within the home, providing warmth in cooler months and coolness during the heat of summer. The materials ground the building in its rural setting, enhancing its connection to the landscape.

Interior Organization

The layout of the COOLHOUSE promotes both social interaction and personal privacy. Large windows allow for light and air to flow through, creating an open and inviting atmosphere. Essential amenities, like a small-scale gas cooking system and solar energy solutions, are integrated naturally into the spaces. A central rammed earth wall not only adds strength to the structure but also serves as an important design feature, linking the interior with its environment.

The wind tower extends upward, capturing breezes and directing them into the living spaces, improving comfort. Its design respects local traditions while also addressing the practical needs of modern living.

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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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    Selected winning projects have the potential to be constructed
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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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