Aeroseal, a Dayton, Ohio-based climate tech company, recently announced they raised $67 million in series B funding, after previously earning $30 million at the first close in February. This round was led by Bill Gate’s BEV and Climate Investments (CI), with new partners Beazer Homes and Aramco.

The company known for their duct and wall sealing technology intends to use the funds for expansion internationally and into new market segments like gas pipelines. Aeroseal’s technologies – HomeSeal Connect for duct sealing and AeroBarrier Connect for building envelope sealing – blow a fog of sealant particles into pressurized spaces, with software tracking the entire process.

Its products can reduce energy consumption of a building by 30% on average. The company’s over 200 employees in Dayton, Ohio, serve contractors, builders, and building owners who are sealing ducts and walls around the globe in everything from homes, hospitals, and schools, to government facilities, hotels, and offices. Since 2010, Aeroseal has sealed more than 260,000 buildings around the world, saving home and building owners billions of dollars in energy savings.

The company currently operates largely in North America, but has a presence in over 30 countries worldwide.

Aeroseal is dedicated to removing one gigaton (roughly the mass of all the land mammals in the world other than humans) of carbon dioxide from the earth’s atmosphere annually using its applications.

It has now has raised over $100 million from investors that see the potential for the technology to grow, as the return on investment for Aeroseal is better than other home improvement options like solar panels, window replacement, etc.