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Geothermal Energy and Thrombus Walls in a Sustainable Greenhouse Restaurant

Authors:
Ruban Olena, Oleksandr Zakopaiko, Sushytskyi Oleksandr, Yana Yakymenko
Geothermal Energy and Thrombus Walls in a Sustainable Greenhouse Restaurant
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Constructed with thrombus walls and powered by geothermal energy, the Iceland Greenhouse Restaurant merges agricultural function with sustainability to offer an immersive dining experience in a breathtaking natural setting.
5 key facts about this project
01
Designed with thrombus walls that enhance thermal performance.
02
Utilizes geothermal energy for sustainable heating and electricity.
03
Integrated large windows frame panoramic views of Hverfjall Volcano.
04
Features a modular design that allows for future expansion.
05
Includes an extensive green roof for improved insulation and water management.

The Iceland Greenhouse Restaurant, designed under the concept of SLAB, is located in the captivating landscape of Iceland, serving both as a restaurant and a greenhouse. The design focuses on blending with the natural surroundings, specifically incorporating views of Hverfjall Volcano and Mývatn Nature Baths. Its core idea is to create a space that connects architecture with nature, enhancing the dining experience and agricultural practices for the benefit of visitors.

Building Form and Integration

The building’s shape follows the slope of the land, allowing it to blend into the environment. This architectural decision improves airflow and enhances natural ventilation throughout the interior. The roof is angled to maximize sunlight exposure, an important consideration in a region with variable weather. Large windows are placed strategically to frame outdoor vistas, strengthening the relationship between the inside and outside spaces.

Functional Layout

Inside, the layout is designed for both efficiency and comfort. The ground floor encompasses a reception area, cloakroom, and multipurpose hall, along with various service spaces for staff. This arrangement ensures a smooth flow of operations while making guests feel welcome. The restaurant section is open and airy, providing diners with clear views of the landscape, which encourages interactions with the natural environment.

Sustainability Features

Sustainability is a key element of the design, reflected through various energy-efficient features. There are cold air and warm air channels incorporated to aid in natural climate control without relying heavily on mechanical systems. A thrombus wall with glass panels allows natural light to penetrate while enhancing thermal performance. Dark concrete is used to retain heat, which contributes to overall energy efficiency. The green roof aids insulation and manages water drainage effectively.

Energy Strategies

Geothermal energy is an essential aspect of the restaurant's sustainability approach. It provides a renewable energy source that lessens the building's negative environmental impact. The design also includes a rainwater collection system, further improving water efficiency. By blending these sustainable strategies, the restaurant ensures that both its culinary offerings and agricultural practices support environmental health.

The design emphasizes a connection to the natural world, highlighted by large openings that allow light to flood the interior. This creates a welcoming atmosphere where diners can enjoy meals while taking in the beauty of Iceland.

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The Buildner’s Unbuilt Award 2025: Celebrating Architectural Creativity and Visionary Unbuilt Designs with a Total Prize Fund of €100,000

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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.

Buildner's Unbuilt Award 2025

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

100,000€ Prize / 2025 ideas COMPETITION
Prize 100,000 €
Eligibility Open to all
Final registration deadline 30 October 2025

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