Data Centre Emissions
Solutions
Complete exhaust and emissions control systems that help data centres operate reliably, sustainably and compliantly without compromising performance. From single diesel/gas engines to hyperscale facilities with 200+ engines.
Reducing emissions from data centre diesel & gas engines is no longer optional, it is a core operational and regulatory requirement.
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Emission Reduction Systems for new installations
and existing diesel or gas engines
Whether you are commissioning a new data centre or managing an existing diesel/gas engine fleet under tightening emissions regulations, ECI has a purpose-built emission reduction solution designed, manufactured and commissioned by ECI's in-house team.
New Installations
ECI's emission solutions are integrated into a design optimised to your exact engine, fuel type, load profile and emissions requirements.
- Full Tier 4 modular design: SCR + DPF + DOC in a pre-packaged solution, or a pre-packaged MIRA-CUBE solution
- Designed with expandable catalyst rows for future emissions reduction
- Individual diesel engine commissioning to current emission targets
- All-in-One CEMS control panel pre-wired
- Continuous Emissions Monitoring System (CEMS) includes a closed loop system as standard
- Urea dosing, mixing duct, storage and accessories fully integrated
- Full handover documentation, technical training and operation manuals
- Targeted emission compliance available: NOx reduction only, disel particulate matter only, Tier 3 or Tier 4 is avialable
Retrofit to Existing Engines
As Emission Regulation Compliance tightens across Australia and the APAC Region, a retrofit emission solution is a cost-effective path to achieve compliance without replacing the asset.
- Engineered to fit existing exhaust systems with minimal structural modification
- MIRA-CUBE™ unique compact plug-and-play SCR/DPF that installs directly on generator enclosures for 1–4 MW diesel engines
- Compatible with diesel, gas, biodiesel blends, HVO, landfill gas and biogas
- Broad operating temperature range: up to 260°C/500°F
- Global remote monitoring and access to data capture
- Key components in our CEMs are from reputable international suppliers
- Removable maintenance doors for rapid servicing, minimal downtime
- Modular design SCR and/or CDPF to provide a solution where plantrooms or enclosures have limited space
Tier 4 Emissions
Compliance
Environmental regulations continue to tighten across Australia and internationally. Data centre operators increasingly require diesel/gas engines that are capable of meeting the world's most demanding emissions standards.
Advanced SCR and DPF technologies are widely recognised as industry best practice for reducing diesel engine emissions in critical power applications.
ECI supplies advanced Tier 4 systems that significantly reduce:
These technologies enable diesel and gas engines to achieve ultra-low emissions while maintaining the reliability expected from mission-critical facilities.
Although standby generators may only operate during testing or emergencies, they remain a significant source of onsite emissions, and regulators are increasingly focused on compliance.
As demand grows
As demand for AI, cloud computing and digital services accelerates, data centres are under increasing pressure to improve sustainability while maintaining resilience. ECI works with consultants, contractors, diesel/gas engine manufacturers (OEMs) and facility operators from concept through to commissioning.
Compact Integrated Emissions System
Ideal for enclosed plant rooms and packaged generator enclosures, as well as stackable applications. Designed specifically for high-output diesel engines, 1 to 4 MW, MIRA-CUBE™ combines multiple emissions technologies into one compact package.
Available through ECI, a MIRATECH Company.
Learn more about MIRA-CUBE™ →Key Benefits
Compact Footprint
Designed for space-constrained plant rooms and enclosures. Stackable capability.
Modular Design
Allows for adding catalyst elements as regulations tighten.
Integrated SCR + DPF
All emissions technologies in one pre-packaged unit, with integrated controlled emissions management system.
Built-in Silencing
Integrated sound attenuation to reduce dBa levels.
Reduced Install Time
Plug-and-play pre-integrated system shortens project schedules.
Simplified Maintenance
Easy access design minimises maintenance time and cost.
Helping data centres reduce
their environmental impact
ECI designs and supplies complete emission reduction systems, engineered to work together as a complete solution, reducing installation complexity while ensuring optimal performance.
Emissions & Compliance
- Reduce harmful exhaust emissions
- Meet stringent EPA environmental regulations
- Achieve Tier 4 Final or better
- Future-proof against further regulatory tightening
Performance & Reliability
- Maximise engine performance
- Protect critical uptime
- Support long-term operational reliability
- Minimise maintenance downtime
Project Support
- FEED and concept design services
- 3D modelling and system integration
- Full installation and commissioning
- Ongoing maintenance and emissions testing
New and changing emissions laws are already in effect
and rolling out across Asia Pacific
Air quality regulations for stationary and off-highway engines are tightening significantly across Asia Pacific. Data centre backup generation is now explicitly named in these updated regulations.
Both NSW and Victoria have published data-centre-specific requirements that set Tier 4 / Stage V aftertreatment as the expected standard, and comparable frameworks are emerging across Southeast Asia. If your current engine installation has not been assessed against the current regulatory framework, the time to act is now.
NSW Data Centre Guidelines Update
The NSW Government released its Data Centre Guidelines in August 2026, setting six principles that data centre proposals will be assessed against. Performance Measure 4 is the critical one for generator operators: proposals must demonstrate ambient air health-based criteria are met other than during emergencies, and meet the Clean Air Regulation 'Group 6' air pollutant limits for stationary reciprocating internal combustion engines.
- Nitrogen oxides 450 mg/m³
- Solid particles 50 mg/m³
- Volatile organic compounds 1,140 mg/m³
- Carbon monoxide 5,880 mg/m³
The Guidelines name Selective Catalytic Reduction (SCR) as an example of how these limits can be achieved.
This changes the risk profile for existing and planned fleets. The Group 6 limits apply regardless of operating hours and regardless of whether the facility holds an Environment Protection Licence — the long-standing 200-hour-per-year threshold that let generators run without point source NOx limits no longer provides shelter.
The Guidelines will be reviewed annually. The NSW Government has committed to developing best practice guidance for air quality and noise impact assessment, and to reviewing the Protection of the Environment Operations Act 1997 framework for data centre developments.
New Application Requirements for Data Centres
EPA Victoria's technical information requirements for data centre development licence applications are unambiguous on backup power. Where diesel generators are selected, EPA expects a minimum standard of generators fitted with Tier 4 / Stage V aftertreatment: diesel particulate filters (DPF), selective catalytic reduction (SCR) and diesel oxidation catalyst (DOC). This is benchmarked against international best practice and demonstrates compliance with the General Environmental Duty (GED).
Applicants must also provide:
- A Level 2 Air Quality Impact Assessment supported by air dispersion modelling covering both standard operations and worst-case (24/7, 365-day) scenarios, with sensitivity studies for taller stacks where possible.
- Technical validation of all performance claims: manufacturer specifications, engineering designs, performance data from comparable facilities and third-party validation reports.
- Monitoring and verification protocols describing how environmental performance will be tracked and how controls will be confirmed effective.
This is a Best Available Techniques or Technology (BATT) test. An engine certified with its original certification at an older tier will not pass.
Regional standards are converging on Tier 4
The same requirements are appearing across the region, and the Australian regulators are explicitly benchmarking against them.
Singapore
The Green Mark for Data Centres scheme and Singapore Standard SS 564 set energy efficiency performance metrics and best practices. The most recent release of electricity capacity to new data centre development required a PUE of ≤1.25 at 100% IT load, with Green Mark certification as a condition of award.
Malaysia
MITI's Guideline for Sustainable Development of Data Centre categorises facilities into six classes, each with baseline and target PUE, WUE and Carbon Usage Effectiveness parameters, declared in accordance with ISO/IEC 30134-2. Sustainable data centre status is a gateway to tax incentives under the DESAC scheme, tying compliance directly to project economics.
Indonesia
For NOx reduction, the government requirement is to install SCR systems, as outlined in the regulations from the Minister of Environment / Environment Control Agency, which detail air quality protection and management planning.
SCRs are to be installed to achieve compliance with the regulations coming into effect late 2026. These will outline the individual regulations for diesel gensets and power plants.
Tier 4 compliance for your existing fleet
Tier 4 Final standards require reductions in NOx and PM of approximately 90% relative to pre-Tier 4 engines, and are now referenced directly in NSW, Victorian and international data centre guidance, requiring data centre standby generators to meet US EPA Tier 4.
ECI's SCR + DPF + DOC package brings Tier 2 or Tier 3 engines to Tier 4 Final performance through retrofit, without replacing the engine. Or the MIRA-CUBE™ offers a compact plug-and-play path to Tier 4 Final for 1–4 MW diesel generator sets.
ECI's applications engineers can assess your site against current EPA regulatory conditions and prepare a compliant emissions solution. Contact ECI today →
Everything in one integrated emission reduction system
A typical ECI SCR NOx Abatement system includes all the following, custom-configured and pre-wired.
Scalable Catalyst Rows
High-efficiency NOx reduction catalyst with optional Oxidation or Particulate Catalyst. The reactor housing accommodates additional rows - as future emission targets tighten, your SCR will scale with them.
Closed-Loop CEMS Control
All-in-One CEMS control cabinet regulates urea dosing via PLC using a continuously monitored NOx signal. Live data stored for a minimum of five years, integrating with SCADA via Modbus. Optional 24/7 remote access worldwide.
Broad Temperature & Fuel Range
Compatible with exhaust temperatures 260°C–500°C and fuel types including diesel, gas, biodiesel, HVO, landfill gas and biogas, including contaminated fuels up to 3.5% Sulphur.
Urea Injection System
Dosing and mixing duct, urea metering pump and control, urea storage tank and all accessories. Urea supplied as solution or pellets fully integrated and pre-commissioned. Providing the lowest amonia slip possible.
Easy-Access Door System
Easy-access designed doors for service and maintenance provide unrestricted access to catalyst blocks, reducing servicing time and cost throughout the life of the asset.
Support Network
APAC-based applications engineers providing full installation support across APAC, commissioning, handover documentation, technical training and ongoing maintenance programmes.
Talk to Asia Pacific's Leading
SCR & Catalyst Experts
Our applications engineers will assess your site, engine specifications and EPA emissions regulations and design an SCR solution that meets Tier 4 regulations today and protects you for future requirements.
Head Office: 29–33 Fonceca Street, Mordialloc VIC 3195 · 1800 730 158 · eci@exhaustcontrol.com.au