Liquid Cooling Systems

Rack densities have climbed past what air can handle, and liquid cooling is the path forward. When a single rack draws 30, 50, or 100 kilowatts, the physics are straightforward: air at those concentrations cannot move heat fast enough without overprovisioning space and fans to the point of absurdity. Liquid cooling systems pull heat directly at the source, move it efficiently to a rejection point, and let operators pack compute density that air-cooled halls simply cannot support.

The capital requirement for a serious liquid cooling deployment scales with the infrastructure. Direct liquid cooling for a row of GPU clusters, a rear-door heat exchanger array, or a full immersion tank setup all carry price tags that make financing a natural conversation rather than an afterthought. We structure loans, leases, and sale-leaseback arrangements specifically for data center infrastructure, with minimums at $50k and deal sizes routinely running into the millions for large deployments. Our process moves on the timeline your capacity plan needs, not the timeline a generalist lender is comfortable with.

Liquid cooling is not a single product. The category spans several distinct approaches, each suited to different rack densities and operational models.

Rear-door heat exchangers mount to the back of standard racks and intercept heat before it reaches the room. They require no change to server hardware and integrate well with existing hot-aisle/cold-aisle layouts. Operators serving mixed-density environments often pair rear-door units with traditional CRAC units or CRAH units to handle base load while liquid takes the high-density rows.

Direct liquid cooling (DLC) routes coolant through cold plates attached to CPUs and GPUs, removing heat before it even becomes airborne. This approach dominates AI training clusters and HPC environments where rack densities routinely exceed 50kW. The infrastructure cost includes manifolds, quick-disconnect fittings, leak detection, and the facility-side heat rejection loop.

Immersion cooling submerges servers in dielectric fluid, capturing nearly all heat produced. Single-phase and two-phase immersion systems each have distinct fluid, containment, and heat rejection requirements. The capital per kilowatt of cooling capacity tends to be higher than other approaches, but the PUE improvements and compute density advantages are significant for operators running sustained high loads.

In-row liquid cooling units position between racks and supplement or replace overhead air. They draw warm air from the hot aisle, pass it over a liquid-cooled coil, and return conditioned air to the cold aisle without long air paths. Buyers serving colocation tenants with unpredictable density often deploy in-row cooling as a flexible capacity buffer.

The operators coming to us for liquid cooling financing share a common situation: the compute density they need to serve, whether for AI workloads, high-frequency trading, or dense colocation tenants, has outrun what their existing air infrastructure can handle.

Hyperscale operators deploying liquid-ready rows ahead of tenant commitments face a timing problem. The infrastructure has to be in place before the revenue arrives, and liquid cooling at hyperscale is not cheap. Financing spreads that capital cost across the period when the load actually fills in.

Colocation providers often encounter liquid cooling requirements from specific tenants, particularly those running GPU-dense workloads for machine learning. Retrofitting a colo hall with liquid infrastructure while maintaining uptime for existing tenants is an expensive, phased project. We structure draws and multi-phase financing to match that kind of rollout.

AI and machine learning companies building private compute capacity have seen liquid cooling go from optional to mandatory. A training cluster pulling 50kW or more per rack has no viable air-cooled answer. These buyers typically know exactly what they need and want financing that closes before the hardware delivery window.

Liquid cooling projects range widely in cost. A rear-door heat exchanger retrofit for a handful of high-density racks might run $150,000 to $400,000 including installation. A full DLC deployment for a dense compute cluster, including manifolds, leak detection, and facility plumbing, commonly runs into seven figures. Immersion tank installations for cryptocurrency mining or HPC at scale can exceed that significantly.

We work across this range. For projects up to approximately $400,000, application-only financing keeps the documentation light: basic business information, three months of bank statements, and equipment details. Larger projects require standard financial review but still move faster than a bank process.

Term structures for liquid cooling infrastructure typically run 36 to 84 months. Equipment leasing structures work well for operators who want to refresh hardware at end of term rather than own aging cooling plant. Equipment loans suit buyers who plan long-term ownership and want the asset on the books. For operators who already own liquid cooling equipment, Sale-Leaseback converts existing iron to working capital without replacing the equipment.

Liquid cooling builds move fast once the engineering is settled. The financing cannot be the constraint. Our standard process from application to funding runs approximately one to two weeks for straightforward credits, with some deals closing faster for well-documented borrowers.

The process starts with a one-page application and the equipment quote or purchase agreement. For deals under the application-only threshold, that is often enough to generate terms. For larger deals, three months of business bank statements and basic financials let underwriters move quickly.

We do not require the equipment to be operational before funding. For projects that are purchased but not yet commissioned, we can fund on the purchase transaction and let the commissioning timeline proceed independently.

Tell us the scope of your liquid cooling project and we will have preliminary terms back to you quickly. Whether this is a rear-door retrofit, a DLC deployment for a GPU cluster, or a large immersion installation, we have seen the asset class before and we know how to structure it. Start with a one-page application and let us move from there.

Can I finance liquid cooling and the servers it will cool in the same transaction?

Yes. We can structure a single facility that covers both the cooling infrastructure and the compute hardware it supports. Bundling the assets into one deal simplifies documentation and often produces better terms than two separate transactions.

Does used or refurbished liquid cooling equipment qualify?

Yes, with some conditions. Used cooling equipment qualifies through our used equipment financing program. We look at the asset age, condition, and remaining useful life. Rear-door exchangers and in-row units with reasonable useful life remaining are generally approvable. Immersion systems are evaluated case by case.

My company is less than two years old. Can I still get approved?

Startups and newer businesses can qualify under our new business financing options. We look at the overall credit profile, the strength of the business plan, and sometimes require a personal guarantee. Deals are possible even without a long operating history.

Can I refinance liquid cooling equipment I already own to pull capital out?

Yes. If you own liquid cooling infrastructure outright or have equity in it, sale-leaseback and cash-out refinancing are both available. We assess the current market value of the equipment and structure a transaction that releases capital while keeping the equipment in place.

How does phased deployment financing work for a multi-row liquid cooling rollout?

We can structure a master facility with staged draws timed to each phase of the deployment. You draw against the facility as equipment is delivered and installed rather than financing the whole project upfront. Terms are set at the outset so you know your cost of capital for each draw.