Aeroseal Funding, Investors & Competitors
Aeroseal has raised $139M across 4 funding rounds, most recently a $20M undisclosed-stage round in April 2026.
Last Aeroseal funding round
$20M
Undisclosed stage · Apr 2026
Cumulative funding Aeroseal raised
$139M
across 4 funding rounds
Key investors in Aeroseal
Breakthrough Energy Ventures
Climate Investment
Energy Impact Partners
Building Ventures
About Aeroseal
Aeroseal is a Dayton, Ohio-headquartered developer of robotic duct sealing technology that injects aerosol sealant into HVAC systems to cut building energy use by 10-30%. Adopted in over 100,000 homes and structures worldwide, including U.S. Department of Energy pilot programs, its method seals leaks from inside ducts without demolition. The firm collaborates with utilities like National Grid for large-scale deployments.
Founded
2010
HQ
Dayton, OHWebsite
Status
Privately held
Customer focus
B2B & B2G
Revenue model
Services
Aeroseal Funding History
Aeroseal has raised a total of $139M across 4 funding rounds.
Aeroseal's first fundraising round was a $22M Series A in June 2021. The most recent completed round was a $20M undisclosed-stage round in April 2026.
Aeroseal funding rounds
| Date | Stage | Investors | Raised | Deal Summary |
|---|---|---|---|---|
| Apr 2026 | Undisclosed stage | - | $20M | Aeroseal LLC raised $22 million in a funding round led by Breakthrough Energy Ventures, with participation from Energy Impact Partners and Building Ventures. As of 2026, the company has raised approximately $119 million in total funding since its Series B in 2023. Aeroseal operates in the HVAC efficiency and building performance sector, having sealed over 300,000 buildings and improved more than 500 million square feet of space through its duct sealing technology. |
| Jul 2023 | Series B | Breakthrough Energy Ventures (lead); Climate Investment (lead) | $67M | Aeroseal is a climate-tech startup that has developed a patented technology to reduce energy leaks in buildings and improve HVAC system performance. The company's products can reduce energy consumption in residential and commercial buildings by 30% on average by detecting and safely sealing air leaks, with studies showing it is 50% more effective at sealing duct leaks than traditional methods and can reduce labor time and costs by 70%. The company has sealed over 260,000 homes and thousands of commercial buildings across 30 countries, resulting in a reduction of over half a million tons of CO2 emissions to date and supporting its goal of removing one gigaton of CO2 from the atmosphere annually. In July 2023, Aeroseal successfully closed a $67 million Series B funding round led by Breakthrough Energy Ventures and Climate Investment, with additional investment from new partners Beazer Homes and Aramco Ventures alongside continued support from existing investors Building Ventures, 2150, and Energy Impact Partners. The company planned to use the Series B capital to accelerate scaling of its technologies, expand globally beyond North America into the United Kingdom and Europe where strong regulatory and policy commitments exist to reduce greenhouse gas emissions, develop next-generation envelope-sealing systems for ENERGY STAR or Net Zero homes, and explore expansion into the gas pipeline industry which faces similar leakage challenges as building operations. |
| Feb 2023 | Series B | Climate Investment (lead) | $30M | Aeroseal is a climate technology company founded in 2010 that provides patented leak-sealing solutions for buildings and HVAC systems. The company's core technology uses fog-based sealant particles (HomeSeal Connect and AeroBarrier Connect) injected into pressurized spaces to seal air leaks in building ducts and walls, reducing energy consumption by an average of 30%. The technology is supported by software that tracks the sealing process and generates completion certificates with before-and-after leakage measurements. In February 2023, Aeroseal announced the first close of its Series B funding round at $30 million, led by OGCI Climate Investment. The round closed fully in July 2023 at $67 million, with additional investors including Breakthrough Energy Ventures, Bill Gates' investment vehicle, alongside new partners Beazer Homes and Aramco Ventures, plus existing backers Building Ventures, 2150, and Energy Impact Partners. The capital was earmarked to accelerate technology scaling, expand into gas pipeline applications, and increase geographic reach beyond North America into the United Kingdom and Europe. By the time of the Series B round, Aeroseal had achieved significant scale with over 260,000 sealed projects across 30 countries and all 50 U.S. states. The company's work had contributed to over half a million tons of CO2 emission reductions and saved approximately $2 billion in wasted energy. The company operates from Miamisburg, Ohio with over 200 employees and was certified as a Great Place to Work, with 93% of employees rating it favorably compared to the typical U.S. company benchmark of 57%. |
| Jun 2021 | Series A | Breakthrough Energy Ventures (lead); Building Ventures; Energy Impact Partners | $22M | Aeroseal, LLC is a climate tech company based in Miamisburg/Dayton, Ohio, that develops innovative technologies to seal air leaks in residential and commercial buildings, reducing energy waste, carbon emissions, and HVAC demand to support net-zero construction and retrofits. The company's patented aerosol sealing solution, including AeroBarrier, originated from UC Davis research and addresses undetectable leaks that contribute significantly to building emissions. Thousands of buildings using Aeroseal have realized nearly $2 billion in energy savings, with potential to shrink global carbon emissions by 1 gigaton annually. On June 22, 2021, Aeroseal closed a $22 million Series A funding round led by Breakthrough Energy Ventures (BEV), with participation from Energy Impact Partners and Building Ventures. The investment, backed by investors like Bill Gates, aims to scale research, development, marketing, and global deployment of Aeroseal's technologies for easier, cost-effective use in new and existing buildings. Funds will double innovation efforts to enhance market penetration and support decarbonization in the buildings sector, a major contributor to climate change. Breakthrough Energy Ventures highlighted Aeroseal's role in solving energy waste from leaks, creating cleaner air, and enabling electrification by reducing HVAC needs. CEO Amit Gupta emphasized the technology's scalability for ENERGY STAR or net-zero homes worldwide. This round positions Aeroseal as a growth-stage player in the built environment, with later rounds including a $67 million Series B in July 2023 led by BEV and Climate Investment, and additional funding bringing total raised to $89 million over multiple rounds. |
Who has invested in Aeroseal?
4 investors have backed Aeroseal across its funding rounds, including Breakthrough Energy Ventures, Climate Investment, Energy Impact Partners and Building Ventures.
Lead investors include Breakthrough Energy Ventures and Climate Investment.
Aeroseal Investors
| Investor | HQ | Rounds | Role | First check |
|---|---|---|---|---|
 London | 2 | Lead | Feb 2023 | |
 Paris | 2 | Lead | Jun 2021 | |
This data is available for Pro users. Sign up to see all 4 Aeroseal investors. Start Free Trial | ||||
Benchmark 350K+ Funding Rounds and Disclosed VC Valuation Multiples
Sign up to see data on 350K+ funding rounds and disclosed revenue and EBITDA valuation multiples, from seed, through growth stage, to pre-IPO.
Start Free TrialAcquisitions by Aeroseal
Aeroseal has acquired 2 companies to date.
Last acquisition by Aeroseal was on September 25th 2024. Aeroseal acquired Aeroseal Arabia for undisclosed valuation.
Latest Acquisitions by Aeroseal
| Description | Aeroseal Arabia is a Riyadh-based licensee of Aeroseal technology, specializing in aerosol-based duct sealing for HVAC systems in Saudi Arabia's commercial and residential buildings. It reduces air leakage by up to 90% in buildings like Kingdom Centre, complying with Saudi Building Code energy standards. The company partners with contractors for retrofits in over 500 projects since 2018. | Comfort Institute is an organization delivering training and certification programs in home performance and HVAC technologies. It offers courses on building science, energy auditing, duct testing, and contractor sales strategies through online and in-person formats. Headquartered in the United States, the institute certifies professionals in high-efficiency HVAC installations and whole-home performance diagnostics to improve indoor air quality and reduce utility bills. |
| HQ Country |  | |
| HQ City | Riyadh | Ohio, IL |
| Deal Date | 25 Sep 2024 | 28 Aug 2014 |
| Valuation | undisclosed | undisclosed |
| EV/Revenue | ||
| EV/EBITDA | ||
This data is available for Pro users. Sign up to see all Aeroseal acquisitions and their M&A valuation multiples. Start Free Trial | ||
Aeroseal Competitors
Aeroseal competitors include listed companies like First Solar, Jinko Solar, Enphase Energy and CSI Solar, and private ones like Radiant and 1Komma5°.
| Company | HQ | Status | Revenue | EBITDA | Valuation | Revenue Multiple |
|---|---|---|---|---|---|---|
| United States | Publicly listed | $5.2B | $2.1B | $22B | 4.0x | |
 China | Publicly listed | $9.8B | $35M | $5.7B | 0.9x | |
| United States | Publicly listed | $1.5B | $227M | $4.8B | 3.5x | |
| China | Publicly listed | $6B | $801M | $4.4B | 1.0x | |
| Los Angeles, CA | Private | - | - | $1.8B | - | |
 Germany | Private | $598M | - | $1.4B | - |
Aeroseal Public Comps
Aeroseal is still privately-owned, but its public comps include GE Vernova, Siemens Energy, Bloom Energy, SLB, Baker Hughes, Sandvik, Doosan Enerbility, Vestas, Tenaris and Halliburton.
| Last FY | EV/Revenue | EV/EBITDA | ||||||
|---|---|---|---|---|---|---|---|---|
| Revenue | EBITDA | Last FY | LTM | 2027E | Last FY | LTM | 2027E | |
| $38B | $3.2B | 6.2x | 5.4x | 73.5x | 43.5x | |||
| $45B | $4.5B | 2.7x | 2.4x | 27.3x | 16.1x | |||
| $2B | ($14M) | 40.9x | 23.7x | (5906.9x) | 112.5x | |||
| $36B | $7B | 2.4x | 2.4x | 12.5x | 10.6x | |||
| $28B | $4.3B | 2.0x | 2.0x | 13.3x | 11.3x | |||
| $12B | $2.9B | 4.2x | 3.6x | 18.2x | 14.3x | |||
| $12B | $818M | 3.7x | 3.6x | 56.6x | 40.9x | |||
| $22B | $2.6B | 1.4x | 1.3x | 11.9x | 10.1x | |||
This data is available for Pro users. Sign up to see all Aeroseal competitors and their valuation data. Start Free Trial | ||||||||
Common questions about Aeroseal
| When was Aeroseal founded? | Aeroseal was founded in 2010. |
| Where is Aeroseal headquartered? | Aeroseal is headquartered in Dayton, OH, United States. |
| Is Aeroseal publicly listed? | No, Aeroseal is a private, VC-backed company. |
| How much funding has Aeroseal raised? | Aeroseal has raised $139M across 4 funding rounds. |
| What was Aeroseal's last funding round? | Aeroseal's last funding round was a $20M undisclosed-stage round in April 2026. |
| Who are Aeroseal's investors? | Aeroseal's investors include Climate Investment, Breakthrough Energy Ventures, Building Ventures and Energy Impact Partners. |
| Which companies are comparable to Aeroseal? | Companies comparable to Aeroseal include First Solar, Jinko Solar, Enphase Energy, CSI Solar, Radiant and 1Komma5°. |
| How many companies has Aeroseal acquired? | Aeroseal has acquired 2 companies, including Aeroseal Arabia and Comfort Institute. |
See companies similar to Aeroseal
Start Your
Free Trial Today
Try Multiples for free for 3 days. Got questions or need a demo? Schedule a call with us below.