Reduce Energy Consumption Without Compromising Ventilation Performance
MoJet® is engineered to improve effective thrust transfer — supporting lower installed power and reduced operational energy demand.
For asset owners, ventilation performance is measured over decades. Fewer installed fans and lower electrical demand can materially affect lifecycle cost.
Owner Benefits
- Potential reduction in installed power (up to ~50%)
- Better fire tunnel safety – MoJets® can deliver higher ventilation flowrate to overcome smoke from larger fires
- Reduced number of maintainable assets
- Lower operational energy use
- Reduced carbon footprint
- Compatibility with conventional testing standards
MoJet® improves aerodynamic efficiency inside the tunnel — where performance actually matters.
Evidence
Multiple successful installations in tunnels worldwide
MoJets have been installed in tunnels of all typical cross-sections
Performance claims are supported by full-scale tunnel measurements
Please see our test results (all independently measured)
Maintenance and replacement costs reduced
Fewer jet fans reduce operational costs and capital expenditure
Your questions answered
Here are some frequently asked questions from tunnel operators and owners
How does MoJet® reduce energy consumption?
By improving in-tunnel efficiency:
- More thrust is delivered per unit power
- Less energy is lost to wall friction
This can lead to up to ~50% reduction in power consumption.
Does MoJet® reduce maintenance requirements?
Yes, because:
- Fewer fans may be installed
- Reduced mechanical and electrical components
This lowers:
- Inspection frequency burden
- Spare parts inventory
- Lifecycle maintenance cost
Can MoJet® be used in existing tunnels?
Yes. It can:
- Increase ventilation capacity without major civil works
- Avoid the need for new niches or large modifications
What is the impact on whole-life cost?
Whole-life cost benefits arise from:
- Lower energy consumption
- Reduced asset count
- Reduced maintenance
This directly supports OPEX and carbon reduction objectives.
Is operational performance proven?
Yes. Evidence includes:
- Full-scale tunnel testing
- Operational installations
- CFD validation across multiple tunnel geometries
Does MoJet® affect tunnel safety (e.g. smoke control)?
MoJet® can:
- Improve thrust delivery, which enhances longitudinal airflow control
- This supports smoke management performance
WHY USE MOJET? Benefits of using the MoJet®
Reduced number of jet fans
The innovative design results in markedly improved energy efficiency and fewer or smaller jet fans being required to provide the same degree of ventilation
Reduced power consumption
lower costs for energy and installed power, as well as a lower carbon footprint.
Reduced cabling costs
MoJets® can be installed much closer together than conventional jetfans.
