Solutions
Increase cooling capacity
Add chilling capacity to existing installations without upsizing chillers or compressors.
Many existing buildings can't get more cooling out of their installation because the chillers are already maxed out — but a chiller upgrade or grid reinforcement is expensive and slow. Cartesian unlocks 20–30 % additional cooling capacity by charging the Thermal Box overnight and discharging through your existing chilled-water loop during the daytime peak. The chillers run more optimized, the building gets more cooling, and the daytime peak load on the grid drops at the same time.
Typical impact
Increase cooling capacity- +25%
- installed capacity
- No
- chiller upsize
- 200 kW – 1.5 MW
- typical chiller size
The challenge
The chillers in many existing buildings are already running at capacity during the daytime peak — but installing more cooling means upsizing the chiller plant, upgrading the grid connection, or both.
The Cartesian outcome
Cartesian adds 20–30 % installed capacity without replacing a chiller. The Thermal Box is charged at night and discharges through your existing chilled-water loop during the peak.
Best fit when…
- Buildings are tight on chiller capacity
- Sites where grid upgrades are slow or expensive
- Offices and retail adding tenants or load
- Your current chiller installation needs to be replaced
How it works
From signal to saving — every cycle.
- 01
Peak profile cooling
We use your cooling demand profile and installed capacity to identify when the chiller runs out of headroom.
- 02
Scalability
The Thermal Box is sized to add 20–30 % capacity during the worst daytime peak.
- 03
Charge off-peak
Cool fluid from the chillers charges the box overnight or during low-load shoulders.
- 04
Discharge through your loop
During the peak, the box delivers chilled water directly into the existing loop — no operator action needed.
FAQ
Common questions about increase cooling capacity
Can we really avoid replacing the chiller?
In most cases yes — for sites with a typical daytime peak and reasonable overnight load shoulders. We model it before quoting.
What happens to chiller wear?
Compressors run for longer periods at a higher average load — typically extending mechanical life with fewer start-stop cycles.
What's the smallest site this makes sense for?
Around 200 kW peak cooling. Below that, savings rarely justify the project.
Continue exploring
Reduce grid peak demand
The same kW you avoid drawing means lower demand charges.
Best fitCommercial and public buildings
Add cooling capacity for new tenants and loads without upsizing the chillers.
ProductThermal Box Standard
Pre-assembled cabinet with hydraulics and Building Management System controller.
Let's build the smarter grid