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Indoor CO₂ capture unit

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Outdoor CO₂ capture

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HVAC integration

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Dubai P2X Demo unit

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Our story

Soletair Power’s technology is the pioneer to the world’s first economically profitable P2X fuel production, produced from CO₂ captured directly from the air. Our compact, sleek and modular-designed air-capture system efficiently captures CO₂ from the indoor air and increases human cognitive functions.

At the office, home or school — we spend 90% of our time indoors. While breathing in a confined space, the inhaled air turns into carbon dioxide. This accumulated high concentration of CO₂ has been proven to make people feel dizzy, tired, and sleepy. The reduced cognitive function means lower learning results and reduced work productivity. Soletair Power’s technology captures the indoor CO₂ produced from breathing. It also turns the exhaled CO₂ into synthetic renewable Power-2-X fuels. By using our carbon-capture system, customers can increase their analytical & decision-making ability, productivity, and performance; at the same time reduce the global CO₂ emissions to a great extent.

In 100 words

Soletair Power contributes to global negative emissions by using Direct Air Capture to harvest pure CO₂. It is currently the only company in the world capturing carbon from building ventilation, which achieves up to a 50% reduction in CO₂ emissions, supports employee wellbeing, and increases productivity by up to 20%. Soletair Power’s modular solution operates with a plug-and-play approach, enabling any company to install and use Direct Air Capture. The carbon the company captures can be reused as a non-fossil-based resource in a wide array of applications, effectively reversing the impact of CO₂.

About us

Soletair Power is a startup founded in 2016, located in Lappeenranta, Finland, operating in the fields of Direct Air Capture and Power-to-X. The startup is primarily backed by the Finnish technology group Wärtsilä. Soletair Power’s technology is the first in the world to combine Direct Air Capture with building integration. Their system absorbs CO₂ from ventilation units inside buildings and captures it to improve air quality in offices. Rather than just reducing carbon emissions, they focus on the fact that DAC can improve employees’ cognitive function by 20% per 400 ppm indoor CO₂ removed, proven by a study by Harvard. The company uses the captured CO₂ in creating synthetic renewable fuel and as raw material for industrial applications. In 2020, Wärtsilä, together with Soletair Power and Q Power, created their first demonstration unit of Power-to-X for Dubai Expo 2020, which can produce synthetic methane from captured CO₂ from buildings.


Soletair Power
Tuotantokatu 2
53850 Lappeenranta

Our story in 1000 characters

It was back in 2016. Our founder, Mr. Ari Piispanen saw in a local newspaper that local university professors went to Germany to see how CO₂ was captured from flue gases in a factory. Ari called the professors, “Hey, why are you capturing CO₂ from flue gases when you could do it directly from the air?” The professor replied, “Well, there’s not really a competitively priced equipment for that,” and Mr. Piispanen said, “What if I could deliver it to you!” and that’s what he did. In 2017, we had two pilots. Then with co-founder Dr. Pasi Vainikka, he found out that, the capture cost is hundreds of euros/ton, when the sales price is tens of euros/ton, not kind of profitable. Mr. Piispanen had another company making indoor air purifiers. He combined these two ideas – capturing CO₂ from building ventilation, and increasing peoples’ performance in buildings as CO₂ is proven to lower our cognitive function. We planned to sell this as a service at $1-2/day/person and that was the starting point.

What role could Soletair Power play in the drive towards net-zero?

Around 40% of global CO₂ emissions come from buildings. By transforming buildings into carbon sinks, net-zero targets can become achievable. Only the combination of DAC technologies and renewable energy sources will enable businesses to become carbon neutral or negative. In addition, transforming CO₂ into a resource decreases the need for other carbon-intensive or non-renewable raw materials such as pesticides and fossil fuels.


Are there any case studies that you can provide?

We are providing a demonstration unit for the Dubai Expo 2020, which will be deployed at the event’s Finnish Pavilion. This single unit, which is approximately five meters long, two meters high, and one meter wide, has Power-to-X incorporated into it.

At one end of the unit sits the CO2 capturing device, while the synthesis is installed at the other end. The controls and electrolyzer are in the middle.

To illustrate how we can use this unit on a large scale, we’ll power an espresso machine with the synthetic natural gas produced by our DAC unit. While the Dubai unit has a 1kW flame, the units we can install in buildings are 30 times bigger.

More about the Dubai Expo 2020 demonstration unit:

We are also working with Germany’s Hydrogen and Fuel Cell Center ZBT, providing the facility with a CO2 capture unit that produces up to 21 kg/day of >98% pure CO₂, compressed to above 10 bar.


  • Turning buildings into carbon sinks.
  • Capturing carbon, improving well-being.
  • Fuel from thin air.
  • World’s first business model that can really lower down CO₂ capture cost.
  • Carbon Ghostbusters

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