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Turning buildings into carbon sinks

We leverage buildings’ ventilation systems to capture atmospheric CO2 by retrofitting HVAC with direct air capture technology. Buildings become net-negative carbon sinks when concrete locks the captured CO2 inside.

12 Mar '23 New HVAC system project begins • Denmark15 Feb '23 SET100 Most Promising Global Energy Start-ups • World Energy Council27 Jun '22 Deployed Outdoor CO2 Capturing Machine at Duisburg, Germany27 May '22 Mythbusters' Jamie Hyneman visits Soletair Power20 Apr '22 Real Estate Board of New York selects Soletair Power as Best in Class7 Dec '21 Patent granted for Soletair Power in the US • US11192065B21 Oct '21 Demonstrated making fuel from thin air at Expo 2020 Dubai

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World’s first company
to deliver fully operational
carbon capture systems


World's first Power-to-X demonstration (Fuel from thin air)

Jointly with Wärtsilä and Q-Power at Expo 2020 Dubai, UAE
(inside exposition hall)


Important people discussing in front a carbon capture system a camera is present

Ambient air CO2 capture unit

The hydrogen and fuel cell center ZBT GmbH, Duisburg, Germany
(commercial building premise)


Machines inside a building HVAC room

Building-integrated CO2 capture unit - DAC 1.0

Wärtsilä Sustainable Technology Hub, Vaasa, Finland
(Commercial building HVAC room)


Blue background

Building-integrated CO2 capture and captured-CO2-to-X project - DAC unit 2.0

We are building our next project which will be retrofitted inside a TBA innovative X factory where CO2 will be captured and the green CO2 will be converted into a novel product.


Building-integrated CO2 capture: Closing the emissions gap.

Shifting to renewables is allowing the world to reduce emissions across many parts of the economy, however, real estate emissions remain difficult to avoid.
Buildings, responsible for 38% of global emissions, can be turned into carbon sinks by making them capture and permanently store CO2.
Our patented Building-HVAC-Integrated CO2 Capture Technology is different from most carbon removal solutions that need high temperatures or specific geography.
Our weatherproof system has the ability to run entirely on renewable electricity and operate inside a building. CO2 is captured utilizing buildings’ existing HVAC system and the residents enjoy CO2-lean air. Captured CO2 returns to the building in the form of concrete blocks and creates negative emissions.
Estimate your building's emissions [external]

A carbon sink is a reservoir that stores carbon dioxide permanently after capturing it from the atmosphere.

For a standard ventilation unit handling 3.3 m3/s, our Building-HVAC-Integrated CO2 Capture Unit can capture 47 kilograms of carbon dioxide per day per module. On average, there are six modules per building. So it’s around 300 kg/day from an average commercial building.

Direct air capture (DAC) is a technology that uses chemical materials to capture carbon dioxide from the atmosphere. When air is moved over these materials, they selectively capture the CO2, allowing the other components of air to pass through.

One of the biggest benefits of direct air capture is siting flexibility. DAC does not require arable land, which can minimize impacts on food production or other land uses. DAC is needed alongside plantations because planting a trillion extra trees will remove only a quarter of the CO2 currently in the air (Ref: BBC). DAC also has a limited land and water footprint and can be installed in places close to suitable CO2 storages, thus eliminating the need for CO2 transport.

High concentration of CO2 in the air indoors has a direct influence on how people think (Ref: Harvard University). The standard indoor CO2 level is expected to stay between 450 and 600 ppm, which is slightly above the normal levels in outdoor air (414 ppm). From 1,000 ppm, room occupiers start to feel dissatisfied and with every 400 ppm increase in CO2 concentration, our cognitive function score drops by 20%. CO2 undercuts our ability to perform in thought works at full potential.

Soletair Power’s technology is the first in the world to integrate atmospheric carbon removal utilizing ventilation systems in buildings. In addition to offsetting building’s CO2 emissions, HVAC-DAC integration can reduce HVAC’s operational costs, and improve people’s well-being. This also brings in the potential to create a localized supply of alternative energy sources.

Our method can capture CO2 from the air, offset emissions, make buildings energy efficient & provide healthy air. Captured CO2 can be stored permanently in concrete, or be used to produce synthetic hydrocarbons using Power-to-X.

White colored Outdoor Carbon Dioxide Capture Unit

How our Outdoor Carbon Capture Unit works (Case: ZBT, Duisburg, Germany)

Soletair Power Building Carbon Capture System HVAC Integrated Direct Air Capture in Building CCUS CO2 capture for emission reduction

How our Building Integrated Carbon Capture Unit works (Case: Wärtsilä STH, Vaasa, Finland)

Power to X Process illustration

How our Power-to-X Unit works (Case: Expo 2020 Dubai, United Arab Emirates)

Recent developments and News

Hot off the wire

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We’ve been featured in

CNBC's documentary on Soletair Power's method

Watch the documentary

About us turning buildings into CO2-capturing machines

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Mentioned in the Wall Street Journal's video as a key player in DAC

Watch the video

Read about us on BBC: Combating global warming

Read the news

Capture CO2 from the air with your own device onsite.

Building Retrofittable Modular CO2 Capture Machines

Products and Delivery Cases


Outdoor CO2 Capture Unit


Building-HVAC Integrated CO2 Capture


Indoor CO2 Filtering Air Purifier

Crowd of importanta people and the technology is progressing

What our customers are saying.

Capture CO2 from the air

Enhance wellbeing & cognitive performance

Store, transform or utilize CO2 & offset emissions

Cooperation partners

Milestones (Swipe left)