Indoor Emissions Retrofit

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Project

Indoor Emissions Retrofit – MTU 20V4000G34F Generator

Engine Size

2488 kW – 95.4L MTU 20V4000G34F

Sector

Healthcare / Hospital Infrastructure

Project Overview

This project featured the integration of a large MTU generator into a hospital environment, with strict acoustic and emissions requirements. The confined indoor location created challenges for routing, system access, and airflow — while demanding Tier 4 Final-level emissions and noise compliance.

Solution Provided

E.I. Williams/IMS engineered indoor SCR solutions benefit the clients with low pressure, thermally managed exhaust systems. In this example, a roof-mounted, airless SCR solution designed to operate in tight, indoor conditions can be seen. The system was customized with comprehensive real-time monitoring and performance tracking tools. Catalyst and silencer modules were integrated for compactness, while maintaining full acoustic and thermal compliance.

System Specification

Engine
MTU 20V4000G34F
Power Output
2488 kW
NOx Reduction Requirement
Tier 4 Final equivalent
Noise Target
≤ 65 dB(A) @ 1m
Installation Constraints
Inside-building space, rooftop configuration
Runtime
30+ hours continuous at full load using single DEF tank
Monitoring
Real-time operational feedback and error logging
Special Functions
Parameter logging system, dynamic adjustment

Visual / Instalation Photos

Results & Impact

NOx & PM Compliance
Met and exceeded EPA requirements
Runtime
Over 30 hours at full load on one tank
Noise Performance
≤ 65 dB(A) @ 1m
Data Insight
Continuous system logging and fault tracking
Optimization
Delivered fully within the spatial and acoustic limits of the site

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