Immersion Cooling Systems

Two kilowatts per server used to be a high-density problem. Hundred-kilowatt racks are the reality for serious AI training and HPC workloads today, and immersion cooling is the infrastructure category purpose-built to handle that level of thermal output. Submerging servers in dielectric fluid removes heat at the source with an efficiency air systems cannot approach, shrinks the footprint required to host a given amount of compute, and opens the door to rack densities that make conventional data center design obsolete.

Immersion cooling systems carry capital costs that match their capability. Full tank assemblies, manifolds, fluid inventory, heat rejection infrastructure, and facility modifications add up quickly. We finance immersion cooling deployments across the range of scales, from single-tank pilot installations to multi-tank production environments. Transactions start at $50,000 and we regularly close deals well above that for operators scaling serious compute capacity. Combined with equipment leasing or direct loans, the capital structure can be matched to how quickly the deployment generates returns.

The two dominant approaches to immersion cooling differ in how the fluid removes heat and where it goes afterward.

Single-phase immersion keeps the dielectric fluid in liquid form throughout the process. Fluid circulates through the tank, absorbs heat from submerged servers, and passes to an external heat exchanger that transfers the thermal load to a facility cooling loop. The fluid itself is engineered not to conduct electricity, making direct contact with live electronics safe. Fluid management is simpler than two-phase systems because there is no phase change to manage. Vendors in this space ship tanks ranging from small pilots to multi-megawatt production systems.

Two-phase immersion uses a fluid with a low boiling point. The fluid vaporizes on contact with hot components, rises to condensers at the tank lid, and returns to liquid form, dropping back into the bath. The phase change transfers heat extremely efficiently. Two-phase systems typically produce better PUE numbers than single-phase at the same density, but the fluid costs are higher and the engineering requirements more demanding.

Both approaches eliminate the need for traditional computer room air conditioning at the immersed racks. For operators pairing immersion tanks with a conventional hall that still has air-cooled infrastructure, the cooling plant mix requires careful design. We have financed immersion deployments alongside chiller plants and cooling towers serving the heat rejection side of the loop, and can structure the full cooling package in a single transaction.

Cryptocurrency mining operations were among the early commercial adopters of immersion cooling. The combination of extreme power density per rack and the continuous, 24/7 duty cycle of mining ASICs makes immersion an efficiency play that justifies the capital outlay. We finance both new immersion installations and refinancing of existing tank infrastructure that was purchased during prior market cycles.

AI and machine learning companies building private training infrastructure have driven the most recent demand surge. A rack of high-end training accelerators pulls 80 to 100 kilowatts or more. No air system handles that economically at scale. Immersion is not optional for serious training cluster builds, and the financing needs to close on the timeline the infrastructure deployment demands.

High-performance computing operators in research, financial modeling, and scientific simulation have long used immersion or direct liquid cooling. Academic HPC facilities and national labs were experimenting with immersion systems before commercial AI made it mainstream. These buyers often have longer procurement timelines and more structured financial processes, and we accommodate both commercial and institutional borrowers.

Colocation operators building liquid-ready capacity for premium tenants also appear in this category. Colocation providers who can promise customers immersion-capable racks command better contract terms and attract tenants that air-only competitors cannot serve. The capital investment is positioned as an amenity that generates durable revenue.

Immersion cooling has been around long enough for a secondary market to exist. Tanks from the 2021-2022 cryptocurrency expansion came back to market as mining economics shifted, and some of that equipment represents genuine value for buyers who know what to inspect.

We finance new immersion tanks directly from manufacturers and used equipment from third-party sellers. For used systems, we evaluate the age of the fluid, the condition of the tank and heat exchangers, and the remaining useful life of the asset. Used equipment financing rates and terms reflect the additional risk of assets without a manufacturer warranty, but the underlying deal structure is otherwise similar to new equipment transactions.

Buyers considering used immersion equipment should budget for fluid testing and possible fluid replacement, inspection of the condensers and pump systems in two-phase units, and verification that the heat rejection infrastructure is compatible with their facility. These costs can be included in the financing if they are part of the vendor contract or installation agreement.

Immersion cooling transactions tend to be larger deals, often above the application-only threshold. Standard documentation for these transactions includes three months of business bank statements, a recent balance sheet and income statement, and a description of the equipment being financed. For operators with multiple entities or complex ownership structures, additional documentation may be requested.

We consider B and C credit profiles. A weaker credit score does not automatically disqualify a borrower, particularly when the business cash flow is strong and the collateral is well-understood. Immersion tanks with good fluid and functional heat exchangers hold value reasonably well, which supports the asset-backed analysis.

Project financing structures are available for larger deployments where the immersion installation is part of a broader data center build. These structures can accommodate the phased nature of large projects, with draws timed to equipment delivery and commissioning milestones rather than a single upfront funding event.

Immersion cooling infrastructure is a specialized asset and we have financed enough of it to understand the technology and the deal structure it needs. Tell us the scale of your deployment, whether it is a pilot installation or a production buildout, and we will put preliminary terms together quickly. One-page application to start.

Can the dielectric fluid and fluid management equipment be included in the financing?

Yes. Fluid inventory is often a significant line item in immersion cooling deployments and can be included in the financed amount as part of the overall system. Fluid management systems, including pumps and monitoring equipment, qualify as part of the package.

What happens to the financing if I need to expand from one tank to three?

We can structure a master facility with room to add equipment as your deployment scales. Alternatively, subsequent tanks can be financed as separate transactions. For operators with a known expansion plan, building capacity into the original facility often produces better terms than coming back for incremental deals.

Does installation and commissioning cost qualify for financing?

Soft costs including installation, commissioning, and integration work can often be included in the financed amount when they appear on the vendor invoice or are part of the purchase agreement. Facility modification costs are evaluated case by case.

Can I do a sale-leaseback on immersion tanks I already own?

Yes. If you own immersion cooling equipment outright, a sale-leaseback converts that asset value to working capital without disrupting operations. We assess current market value and structure a transaction accordingly. The equipment stays in place and you continue operating it under the lease.

My crypto mining operation has inconsistent revenue. How does underwriting work?

Mining operations with variable revenue are evaluated on the basis of business bank statements, total deposits, and the overall financial picture rather than W-2-style income consistency. Three months of bank statements is the starting point. Deals are structured to fit the cash flow reality rather than forcing miners into structures that do not match how the business actually generates money.