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Soletair Power

Carbon Capture Solutions

Company profile


Our plug-and-play systems can operate in a low-heat environment inside buildings or on office premises. Millions of tons of CO2 from the city air can be captured by our HVAC retrofittable carbon capture machines.

Established in 2016, Finnish carbon capture technology provider company Soletair Power is focused on global negative emissions by integrating Direct Air Capture into commercial building HVAC systems, both indoors and outdoors. The captured CO2 is stored in containers and supplied to concrete manufacturers for permanent storage.

In 2021, Soletair Power demonstrated a compact Power-to-X methane production module at Expo 2020 Dubai and installed an outdoor DAC unit at the ZBT hydrogen and fuel cell center in Duisburg, Germany in 2022. In 2023, they installed their HVAC-integrated DAC system at seed funding company Wärtsilä’s Sustainable Technology Hub building in Vaasa, Finland.

Soletair Power HVAC-integrated CO2 Capture system can capture up to 20 tCO2/year/unit and reduce energy consumption and cost of ventilation.

We turn buildings into carbon sinks.

Soletair Power addresses the issue of CO2 emissions originating from buildings, responsible for nearly 40% of global CO2 emissions. Existing direct air capture solutions face challenges in cost and efficiency. Soletair Power’s breakthrough lies in achieving net-zero emissions by integrating direct air capture with building ventilation systems, providing an economically viable solution for capturing CO2, thereby generating negative emissions, reducing energy consumption, and improving indoor environments.

Soletair Power’s patented onsite HVAC integrated CO2 capture technology empowers commercial property owners to reduce their buildings’ overall emissions while achieving significant cost savings. The technology captures CO2 from the air by retrofitting ventilation systems with CO2-binding materials, later converting the captured CO2 into concrete. The modular carbon capture systems operate with a plug-and-play approach, enabling property owners to rapidly and easily install the system.

One HVAC-integrated DAC unit (in buildings with ventilation of 3 m3/s) can capture up to 20 tons of CO2 per year, equivalent to 3 hectares of Nordic forest aged 30 years. If building ventilation runtime is controlled by CO2 levels, the system will also help lower the costs of HVAC energy use.

Rather than relying solely on CO2 emission offset sales, Soletair Power benefits from stable building temperatures for efficient and weatherproof onsite CO2 capture. The technology operates below 100°C temerature leveraging existing heat, providing a remarkable edge over competitors.

The easy deployment of our modular carbon capture technology can significantly impact the carbon market when scaled. This benefits building owners, making it a financially feasible solution that can contribute positively to the planet.

We’ve showcased our ambient air CO2 capture and fuel production using Power-to-X technology at Expo 2020 Dubai. Successful pilot initiatives have been undertaken, including a containerized outdoor carbon dioxide capture unit at ZBT in Germany with a daily capture capacity of 21 kg CO2. Another unit deployed at the Wärtsilä Sustainable Technology Hub in Vaasa, Finland, has a daily capture capacity of 50 kg.

In 2024, a client is deploying our HVAC integrated CO2 Capture unit at a factory in Vantaa, Finland where the capture CO2 will be converted into a valuable resource. The next building ventilation integrated unit is scheduled to be deployed in Aarhus, Denmark. Each of these solutions has the potential to capture close to ~20 tonnes of CO2 per year per ventilation unit.

Every day, we try to innovate ways to enhance our technology, our way of work and our spectrum of imagination. Our values live through the entrepreneurial spirit of our diverse and inclusive network.

What we do

We develop modular CO2 capture solutions retrofittable with ventilation systems. The technology empowers commercial property owners to capture CO2 onsite, decrease the building’s HVAC energy consumption, and lower carbon footprint. Captured CO2 can be utilized in the concrete industry resulting in negative emissions. Since the system always supplies CO2-lean air, it is possible to supply better air indoors.


To turn buildings into carbon sinks by integrating DAC with HVAC, decrease energy costs and emissions, and reach an annual capture capacity of 130,000 tCO2 by 2030.


To build the world’s largest distributed CO2 capture ecosystem and turn buildings into active protectors of the planet.