Technology

Direct air capture, built into the building

Our technology integrates advanced adsorbent materials into building ventilation systems, capturing CO2 from both metabolic and atmospheric sources, where concentrations are highest.

A busy multi-level shopping mall atrium with escalators, glass balustrades and people moving between storefronts, an example of an indoor space where many people share the same ventilated air.

Why indoor air

Indoor air is CO2-rich. Every person exhales carbon dioxide, and ventilation systems already move that air. Instead of building energy-hungry capture plants, we intercept the CO2 where it's most concentrated, in the exhaust air stream.

The process in three phases

  1. Selective capture

    Advanced, eco-friendly adsorbent materials integrated in the ventilation system bind CO2 molecules as air passes through.

  2. Regeneration

    When the adsorbent is saturated, the captured CO2 is released, for example through controlled heating.

  3. Compression and reuse

    The purified CO2 is compressed, stored and reused in concrete production, chemicals, food production and greenhouse cultivation.

From room to rooftop

Cutaway 3D render of a lecture hall with tiered seating and people standing at the front, where ceiling-mounted discharge ducts collect CO2-rich exhaust air and route it out of the room.

Step inside

It starts where people gather

In an occupied lecture hall, office or arena, discharge ducts collect the CO2-rich exhaust air and route it out of the room.

Cutaway 3D render of the same building seen from above, with the full carbon capture equipment chain installed on the roof and connected to the ventilation system below.

On the roof

A complete system on the roof

The capture chain connects directly to the building's existing HVAC installation. No rebuilding of the spaces below.

3D render of the labelled equipment chain: HVAC system, dehumidifier, cooling unit, DAC2 unit and compressor connected in sequence, with outlets marked CO2 Free Air and CO2 Duct. A human figure stands beside the units for scale.

The full chain

From exhaust air to pure CO2

HVAC system, dehumidifier, cooling unit, DAC2 unit and compressor work in sequence. Out comes CO2-free air, and pure CO2 ready for reuse.

Case study

Linköping University campus

Together with Linköping University, we have studied the capture potential at Campus Valla: 166,000 square meters of university buildings used by more than 18,000 students. The analysis shows a capture potential of around 1,850 tons of CO2 per year, roughly the annual emissions of 265 people in Sweden. High occupancy and long operating hours make campus environments ideal for indoor carbon capture.

Capture potential
1,850tons CO2 / year
Building users
18,000+students on campus

From emission to resource

Captured CO2 becomes a resource: boosting crop growth in greenhouses, enriching concrete, and serving as feedstock for chemicals and food production. A circular model that turns emissions into value.

The technology is built on two decades of world-leading research on energy efficiency and climate control at Linköping University.

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