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Photocatalytic Tower Constructed with Cross-Laminated Timber Panels for Urban Air Purification

Authors:
Donghyeon Won, Taehyun Lee, Dongmin Sun
Photocatalytic Tower Constructed with Cross-Laminated Timber Panels for Urban Air Purification

Project in-detail

Constructed with cross-laminated timber panels and coated in titanium dioxide, this tower serves as an urban air purification system while providing a communal space that enhances social interaction amidst polluted city air.
5 key facts about this project
01
Constructed with titanium dioxide to enhance air purification efficiency.
02
Incorporates cross-laminated timber for reduced carbon footprint and structural strength.
03
Features an elliptical void that optimizes natural airflow throughout the building.
04
Rooftop garden designed to promote biodiversity and enhance user experience.
05
Dual spiral form symbolizes unity while facilitating natural ventilation.

The "Smog Free Tower" is an architectural project situated on Nodle Island near the Han River in Seoul, South Korea. This project addresses urban air pollution, particularly the issue of fine particulate matter that affects public health. By merging architectural aesthetics with environmental technology, the Smog Free Tower functions as both a landmark and an air purification system, aiming to improve local air quality while providing a welcoming public space.

The design comprises two spiraling towers connected through an elliptical void, fostering an image of connectivity and fluidity. This architectural configuration allows for natural ventilation and optimizes airflow throughout the structure. Its significant height and distinct form enhance the visibility of the building in the urban landscape.

The project employs a range of materials that contribute to its functionality and sustainability. Notably, it incorporates Titanium Dioxide (TiO₂) on its façade, which enables a photocatalytic reaction to purify air pollutants. This innovative use of TiO₂ helps transform harmful nitrogen oxides into benign compounds. Another primary material is Cross-Laminated Timber (CLT), which is utilized for its strength, thermal insulation properties, and sustainability credentials. The use of CLT represents a shift toward eco-friendly building practices in the architectural field.

Unique Design Approaches

The Smog Free Tower distinguishes itself through its dual role as an architectural structure and an environmental solution. Its innovative design integrates air purification technology into the building envelope, effectively playing a part in mitigating urban smog. The architectural form, inspired by natural structures, enhances the aesthetic quality of the building while improving functionality.

Moreover, the design incorporates a rooftop garden that supports biodiversity and offers recreational space for inhabitants. The arrangement of interior spaces promotes social interaction by providing communal areas for activities such as meetings and informal gatherings, enhancing the user experience in an urban environment.

Architectural Integration and Community Engagement

The architectural layout of the Smog Free Tower is carefully planned to maximize functionality while promoting environmental stewardship. The inclusion of transparent elements in the façade allows natural light to penetrate deep into the interior spaces, reducing reliance on artificial lighting and enhancing the overall atmosphere. The open-plan designs on various floors encourage collaboration and adaptability, catering to a range of public and private uses.

The project serves as a beacon for sustainable architecture within Seoul, sparking conversation around urban pollution and health. By addressing these pressing issues through design, the Smog Free Tower not only benefits its immediate users but also promotes a broader awareness of ecological responsibility in urban settings.

For a comprehensive understanding of the Smog Free Tower, including architectural plans, sections, and detailed designs, it is recommended to explore the project presentation further. This will provide deeper insights into the architectural ideas and design outcomes that contribute to its unique position in contemporary architecture.

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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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