About
Heirloom Carbon is pioneering one of the world's most cost-effective and scalable Direct Air Capture (DAC) solutions by leveraging the natural chemistry of limestone. Limestone is an abundant mineral that slowly absorbs CO₂ from the air through a process called carbon mineralization — Heirloom's technology compresses this process from years down to just days, dramatically reducing the cost and time required for meaningful carbon removal. Heirloom integrates this accelerated mineralization approach into full-scale DAC facilities powered by 100% additional renewable energy. The company has established America's first commercial DAC facility in California's Central Valley and is actively building two large-scale facilities in Northwestern Louisiana with a combined annual CO₂ capture capacity of nearly 320,000 tons. Each carbon removal credit sold by Heirloom represents exactly one verifiably and permanently removed ton of CO₂, independently monitored by third parties and safely stored underground. Heirloom's facilities are also designed with a community-first philosophy, prioritizing high-paying local jobs, strong labor protections, and community governance models. Heirloom is the go-to partner for enterprises and organizations committed to credible, high-quality carbon removal as part of their climate strategies. It is backed by leading climate investors and recognized as America's foremost DAC company.
Key Features
- Accelerated Limestone Mineralization: Heirloom's proprietary process compresses the natural carbon mineralization timeline of limestone from years to just days, enabling rapid and low-cost CO₂ capture at scale.
- Verified & Permanent Carbon Removal Credits: Every credit represents exactly one ton of CO₂ permanently removed from the atmosphere, independently monitored by a third party and safely stored underground.
- Large-Scale DAC Facilities: Operating America's first commercial DAC facility in California and building two additional facilities in Louisiana with a combined capacity of nearly 320,000 tons of CO₂ per year.
- 100% Renewable Energy Powered: All Heirloom facilities run entirely on additional renewable energy, ensuring the carbon removal process itself has a minimal environmental footprint.
- Community-First Governance Model: Facilities are designed with strong labor protections, high-paying local jobs, and community governance structures that deliver lasting social and economic benefits.
Use Cases
- Enterprises purchasing high-quality, permanent carbon removal credits to meet net-zero or carbon-negative sustainability commitments.
- Organizations seeking independently verified carbon offsets with transparent, science-backed removal methodologies.
- Climate-focused investors and partners looking to support the scaling of cost-effective Direct Air Capture infrastructure in the US.
- Government agencies and municipalities procuring carbon removal to meet regulatory or voluntary climate targets.
- Businesses aiming to differentiate their ESG reporting with credible, permanent CO₂ removal rather than avoidance-based offsets.
Pros
- Verifiably Permanent Removal: CO₂ is stored underground and independently verified, giving buyers confidence that their removals are real, measurable, and durable.
- Cost-Effective at Scale: Limestone is abundant and inexpensive, making Heirloom's approach one of the lowest-cost pathways to high-quality, permanent carbon removal.
- American DAC Leadership: Heirloom operates the first commercial DAC facility in the US and is rapidly scaling, positioning buyers at the forefront of credible climate action.
Cons
- High Entry Cost for Small Buyers: Carbon removal credits from direct air capture are still significantly more expensive than nature-based offsets, which may be a barrier for smaller organizations.
- Limited Geographic Availability: Facilities are currently located only in California and Louisiana, and physical proximity may matter for some community or regional carbon goals.
Frequently Asked Questions
How does Heirloom's technology work?
Heirloom uses limestone, a naturally abundant mineral, and accelerates its natural carbon mineralization process from years to just days. The captured CO₂ is then permanently stored underground through Direct Air Capture (DAC) technology.
Are the carbon removals verified and permanent?
Yes. Each removal credit represents exactly one ton of CO₂ that has been permanently removed from the atmosphere. Removal is independently monitored by a third party to ensure accuracy and integrity.
How can my organization purchase carbon removals from Heirloom?
Organizations can visit heirloomcarbon.com and use the 'Remove CO₂' feature to purchase verified carbon removal credits directly from Heirloom's active facilities.
What energy source powers Heirloom's facilities?
All Heirloom Direct Air Capture facilities are powered by 100% additional renewable energy, ensuring the removal process itself is clean and low-impact.
Where are Heirloom's facilities located?
Heirloom operates America's first commercial DAC facility in the Central Valley of California, and is building two additional facilities in Northwestern Louisiana with a combined annual capture capacity of nearly 320,000 tons of CO₂.
