FeX delivers stable high-temperature heat for campuses, hospitals, and district energy systems.
FeX stores electricity as high-temperature thermochemical energy and delivers stable heat through campus heat loops, district energy networks, and building heating systems.
Store electricity off-peak and deliver heat when operations demand it.
Reliable heat for district energy plants, hospitals, and large buildings.
Add heating capacity without expanding electrical infrastructure.
Maintain stable heat supply across buildings during grid constraints.
District energy for universities, hospitals, and community infrastructure.
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Containerized heat infrastructure that integrates directly into your existing energy systems.
On-site renewables, grid electricity where available, or curtailed power.
Iron-based thermochemical cells. Energy stored for days or weeks.
Up to 900°C heat via air, glycol, steam, or optional CHP.
~1/10th the physical
footprint of lithium-ion batteries.
Per container
Footprint vs Li-ion
Campus payback
LCOS (12h config)
Peak output per unit
A Northern university campus study shows FeX can replace oil-fired winter heating with lower-cost renewable thermal energy.
4.5 years
~$0.12/kWh
~2.2 kt / year
~1/30th of lithium-ion
Deploy on-site. Validate under real heat loads. Generate bankable performance data to support scale-up decisions
Pilot deployment currently underway with support from:
Assess system performance under real operating conditions.
Collect operational insights to inform deployment decisions.
Use validated results to define your deployment strategy.
Can FeX replace a gas or oil boiler in a campus or district heating system?
Yes. FeX integrates directly into existing hydronic heating systems as a behind-the-meter thermal storage layer, displacing gas or oil-fired heat with electricity stored in iron. The system charges from low-cost or renewable electricity and delivers sustained high-temperature heat on demand, without modifying existing distribution infrastructure or requiring a new gas connection.
Does a FeX deployment help manage EV charging load on campus?
Yes. As campuses add EV charging infrastructure, peak electricity demand increases significantly, often pushing sites toward costly grid upgrades. FeX reduces net peak demand by shifting thermal loads off-peak, creating headroom on existing grid connections for EV charging and other electrification without requiring expanded grid capacity.
Does FeX require a grid connection upgrade to install?
No. The system is designed specifically for campuses and institutions facing grid constraints. It charges during off-peak periods within existing connection limits and stores energy in iron for use when demand peaks. This avoids the cost and timeline of grid upgrades, typically the single largest barrier to campus electrification.
How does FeX integrate with existing hydronic heating systems?
FeX connects directly to existing campus heat loops and district energy networks. The modular containerized units act as a thermal battery that feeds into the existing distribution system, with no requirement to replace boilers immediately. This allows campuses to phase their transition from fossil heat on their own schedule.
What is the storage duration for campus heating applications?
Storage duration is configurable by container count and site load. A 12-hour campus configuration has delivered heat at approximately $0.12/kWh in cold-climate validation cases, competitive with oil-fired alternatives when fuel transport costs are included. Multi-day configurations are available for sites requiring resilience across extended outages or severe weather events.
What is the physical footprint of a campus installation?
FeX has roughly 1/30th the footprint of a comparable lithium-ion installation for the same stored thermal energy. For a campus with 2.75 MW of peak heat demand, the system fits within a standard equipment pad with no special site preparation. This matters for institutions with limited mechanical room space or heritage building constraints.
Is FeX suitable for district heating networks serving multiple buildings?
Yes. FeX is designed specifically to integrate with district energy systems, including university campuses, hospital complexes, municipal heating networks, and large residential developments. It adds thermal storage capacity to existing networks without requiring new central plant infrastructure, improving resilience and reducing peak fuel consumption across the connected building stock.
What carbon abatement results has a FeX campus deployment achieved?
A cold-climate university campus case study demonstrated approximately 2,223 tonnes of CO₂ abated per year, replacing oil-fired winter heating with iron-based thermal storage charged from wind energy. Payback was 4.5 years with incentives, at a cost of approximately $0.12/kWh in a 12-hour storage configuration.
FeX supports district energy systems for universities, hospitals, and communities.
Iron-based energy storage delivering firm heat and power on demand.