Pre-assembled cabinet, ready to connect
Thermal Box Standard
Thermal Box delivered in a pre-assembled cabinet with circulation pump, energy meter, required valves and a Building Management System controller — ready for integration into your local Building Management System.
Thermal Box Standard is the most popular configuration — the Thermal Box plus a pre-assembled cabinet containing the circulation pump, energy meter, required valves and a Building Management System controller. Delivered ready to plug into your local Building Management System via BACnet or Modbus. Commissioning is a day, not a fortnight.
Thermal Box with hydraulics, controls and a Building Management System–ready controller — all in one pre-assembled cabinet.
Get a sized concept
Pre-assembled cabinet
Hydraulics, sensors, pump and controller integrated and pressure-tested in one cabinet.
Building Management System ready
BACnet, Modbus and standard protocols for any Building Management System.
Energy metering
Built-in energy meter for M&V and performance verification.
Quick commissioning
Plug in hydraulics and power — commissioned in a day, not weeks.
Specifications
- Includes
- Thermal Box + hydraulic skid + controller
- Integration
- Ready for local Building Management System
- Storage capacity
- 60 – 125 kWh per module
- Lifetime
- 25+ years
How it works
From the shop floor to your roof — in four steps.
- 01
Pre-assembled in our shop
Cabinet built and pressure-tested in Trondheim — pump, valves, sensors and controller wired and ready.
- 02
Connect hydraulics
Flanged connections to your supply and return loop — typically one working day.
- 03
Hand off to your Building Management System
Plug the controller into your local Building Management System via BACnet or Modbus.
- 04
Operate locally
Runs autonomously from your local Building Management System rules — no external network required.
What's included
Everything you need to ship a working install.
Pre-engineered, pressure-tested and certified before delivery — so commissioning takes days, not weeks.
- Thermal Box module(s)
- Pre-assembled cabinet (stainless steel)
- Variable-speed circulation pump
- Modulating control valves and check valves
- Energy meter (heat / cold)
- Building automation controller
- BACnet · Modbus integration
Common questions
Got questions about thermal storage?
From PCM chemistry and lifetime to indoor vs outdoor installs and typical payback — the answers are in the full FAQ.
Read all questionsWhat is thermal energy storage?
The term is used when storing energy as heat or cold, which can be released at a later stage. The heat or cold is usually stored when energy is cheap and then released when the heating or cooling demand is at a peak or the cost of energy is high.
What is PCM?
PCM means Phase Change Material and refers to any material that changes state, for example from solid to liquid, when reaching a certain temperature. This phase change enables large amounts of energy to be absorbed or released. Water is one PCM, storing cold at zero degrees Celsius by changing phase to ice. Cartesian uses a wide variety of other materials, such as bio-based waxes, to store heat or cold at different temperatures.
Is the Thermal Box and the PCM flammable?
For applications with HVAC systems, Cartesian's Thermal Box is not considered flammable. While some PCM might be flammable when they reach temperatures above 100 °C or more, the Thermal Box is designed to eliminate any risks of reaching flammability conditions in operations.
Are PCMs safe?
Cartesian offers only safe PCMs and primarily uses bio-based PCMs in the Thermal Box. The PCM will stay in the Thermal Box for its whole lifetime and is not consumed during operation. The Thermal Box is also designed to avoid any risk of PCM leakage.
Let's build the smarter grid