Modular hybrid heating
Aurora Block is a modular hybrid heating system that keeps the heat on in hard frost and through a power cut. Stackable modules fit a tight urban plot, and the system switches between heat pump and biodiesel backup on its own.
Aurora Block modules
Three modules and a ground thawing trailer that work on their own or together. Calculate the sizing your site needs with the heating energy calculator, then add the products to your quote cart.
Modular hybrid heating for construction sites and industry
Aurora Block is a modular hybrid heating system that makes sure the temperature never drops too low – not in extreme cold and not during a power cut. It was developed for tight urban sites, where a conventional heating container does not fit.
Aurora Block combines four energy units that work independently or as a hybrid:
- Aurora 28 – air-to-water heat pump, 11.4–28 kW
- Aurora 50 – ground-source heat pump, 20–51 kW
- Aurora 64 – backup heating unit, 64 kW
- Aurora Frost – ground thawing trailer, 64 kW
Why modular hybrid heating differs from other solutions
A hybrid that guarantees uninterrupted heat
The system switches automatically between air, ground and fuel-fired heat. When the temperature falls to about –25 °C, it moves to the Aurora 64 module, which produces water at 90 °C and keeps running through a power cut thanks to eight hours of battery backup.
The result is reliable, energy-efficient and uninterrupted heating in any conditions – including an arctic climate. Arctic Warm states the system’s operating reliability at over 99 % across demanding sites.
Heating, cooling, drying and frost thawing in one system
Aurora 28 and Aurora 50 heat and cool fluid across −10…+60 °C and −12…+60 °C. Ground thawing has its own unit, Aurora Frost, with 600 m of thawing hose on motorised reels and a thawing area of 0–400 m².
The system suits:
- construction sites and renovation projects
- warehouses and halls
- industrial premises and server rooms
- temporary facilities and accommodation
- drying and moisture control
- frost thawing in winter
- security-of-supply and defence sites
- greenhouses and hotels
Energy-efficient and low-emission
The heat pumps draw their energy from the air or the ground, cutting both energy costs and emissions. Aurora 64 runs on diesel or HVO biodiesel, which burns more cleanly than a conventional oil boiler.
According to Arctic Warm, the system cuts total costs by up to 30 %, carbon dioxide emissions by up to 90 %, and makes costs up to 85 % more predictable. In conventional heating as much as 90 % of the cost comes from fuel – which is exactly why cutting running hours delivers the largest saving. Finland’s national energy agency Motiva publishes background on heat pump technology.
Modular hybrid heating scales with the project
Aurora Block scales from a single module to a large multi-component system. Modules are combined to match the project’s output demand exactly, and capacity is added in stages as construction proceeds. An example configuration totals 296 kW.
The modular format means the units can be:
- stacked on top of each other
- placed in narrow shafts and installation corridors
- lifted onto a balcony, an intermediate floor or a roof
Reliable operation even in extreme cold
Where conventional heat pumps lose output at –25…–30 °C, Aurora Block keeps the system working by:
- starting the Aurora 64 module automatically at low temperature
- compensating as the heat pumps’ COP falls
- continuing to run through a power cut (Aurora 64: 8 h battery)
- delivering a high flow temperature, up to +90 °C
That protects the project from delays, frost damage and downtime.
Modular hybrid heating is remote-controlled and autonomous
IoT Spine selects the optimal heat source automatically. Remote control gives full command of temperatures, energy consumption and unit status, a fast response to deviations and the means to minimise downtime. Read more about Spine heating control.
Conditions are monitored continuously and adjusted automatically from real-time measurement data, so less manual supervision is needed.
Comparing the modules
The table below shows the differences at a glance. Full details are on each module’s own product page.
| Feature | Aurora 28 | Aurora 50 | Aurora 64 | Aurora Frost |
|---|---|---|---|---|
| Unit type | Air-to-water heat pump | Ground-source heat pump | Condensing oil boiler (diesel/HVO) | Ground thawing trailer |
| SKU | 1050601001 | 1050601004 | 1050601002 | 1050601003 |
| Output | 11.4–28 kW | 20–51 kW | 64 kW | 64 kW |
| COP / efficiency | up to 4.1 | 4.5 (B0/W35) | 90–98 % | 90–98 % |
| Temperature range (fluid) | −10…+60 °C | −12…+60 °C | up to +90 °C | up to +90 °C |
| Main functions | Heating, cooling, drying | Heating, cooling | Backup and peak heat | Ground thawing |
| Role in the hybrid | Primary heating and cooling module | Main module where borehole energy is available | Automatic backup below −25 °C | Separate thawing unit |
| During a power cut | Via the hybrid system | Via the hybrid system | 8 h battery backup | Runs on the Aurora 64 boiler |
| Electrical supply | 32 A / 400 V, max. 11 kW | 3 × 32 A / 400 V, max. 19.5 kW | Single-phase, max. 500 W | 230 V |
| Fuel tank | – | – | approx. 500 L (also HVO) | Aurora 64 boiler tank |
| Suitable for ground thawing | No | No | No | Yes, 0–400 m² |
| Suitable for cooling | Yes, 20 kW (A35) | Yes | No | No |
| Dimensions (W × D × H) | 1140 × 1440 × 1600 mm (modules) | Towable trailer | ||
| Weight | 370 kg | 495 kg | 450 kg (dry) | 700 kg (empty tank) |
| Connection | 2″ flange | 600 m of thawing hose | ||
| Spine remote control | Standard, 5-year licence included | |||
| Placement | Modules are stackable and liftable; Aurora Frost is a towable trailer | |||
Calculate the heating energy your site needs
Arctic Warm’s free calculator helps you size the heating need before you request a quote. Enter the details of your site and the calculator shows how much heating energy it requires and which combination of Aurora Block modules produces that energy most efficiently.
Open Arctic Warm’s heating energy calculator
Once the required output and the modules are clear, add them to the quote request basket. A ready sizing speeds up the quote.
Download the Aurora Block product sheets
Each unit has a one-page product sheet in PDF format. The sheet covers the key features, the Spine integration, the system integration and the full specification table.
- Aurora 28 – air-to-water heat pump (PDF)
- Aurora 50 – ground-source heat pump (PDF)
- Aurora 64 – backup heating unit (PDF)
- Aurora Frost – ground thawing trailer (PDF)
Frequently asked questions
What does modular hybrid heating mean?
The system is built from separate modules that are combined into one installation. It uses several heat sources – air, ground and fuel – and switches between them automatically as conditions change.
When does the backup heat start?
Automatically, when the outdoor temperature falls to about –25 °C or the power fails. The Aurora 64 boiler has eight hours of battery backup.
How far does the system scale?
From a single module to a large installation. An example configuration totals 296 kW, and capacity is added in stages as construction proceeds.
Where can the modules be placed?
The modules are stackable and fit narrow installation corridors. They can also be lifted onto a balcony, an intermediate floor or a roof.
Is modular hybrid heating suitable for frost thawing?
Yes. Ground thawing uses the Aurora Frost trailer, whose heat comes from a 64 kilowatt condensing oil boiler. The trailer carries 600 m of thawing hose and covers a thawing area of 0–400 m².
Does the site need a separate network connection?
No. IoT Spine remote control is integrated into the modules and works without a local network.
Request a quote for an Aurora Block system
Add the modules you need to your quote cart and send the request – we will size a configuration for your site and confirm the delivery time. You can collect several modules in one cart.
The rest of our site heating equipment is on the heating page. If you want to talk it through first, open the chat in the bottom right corner.