Generator Flue Installation
A safe and compliant generator installation isn’t complete without a properly designed flue system. At HG Projects, we install generator flues that manage exhaust gases efficiently, protect your building and meet all relevant environmental and safety regulations. Whether it’s a new setup or a retrofit, we ensure your flue system is built to last and ready to perform.
Safe, Compliant Generator Flue Systems for All Building Types
Generator exhaust gases must be managed correctly to ensure safe operation and long-term performance. Poorly designed flue systems can lead to overheating, back pressure, or hazardous emissions, all of which can affect both equipment and the environment.
At HG Projects, we design and install generator flue systems that meet the specific needs of your building, generator size and fuel type. From small commercial sites to large plant rooms, we ensure every component is fitted to the highest standards, offering safe exhaust removal, proper ventilation and full compliance with UK regulations.

Flexible tailored generator maintenance contracts
In-house generator modernisation experts
24 hour callout generator service
Reliable engineers with over 30+ years experience
Projects
Powering a Critical Radar Station Against the Odds
Innovative Engineering for Maximum Reliability
The old generators were carefully removed using a small HIAB vehicle, ensuring zero disruption to critical operations. The new units were positioned over a bunded area to prevent leaks, reflecting a commitment to environmental protection.
To meet ultra-long runtime needs, the generators were equipped with:
- An advanced oil make-up system — featuring a large storage tank and additional filters, extending service intervals to a remarkable 2,000 running hours.
- Deutz oil/air-cooled engines — chosen for their legendary reliability and minimal maintenance requirements.
The control system was strategically configured to ensure continuous power. By alternating runtime between the two sets, operational hours were evenly shared, preventing excessive wear on any single unit. In the event of a failure, seamless backup would ensure uninterrupted function at critical moments.
Our Flue Installation Services Include:
Site Assessment and Flue System Design
We begin with a detailed site assessment to understand the generator’s location, ventilation needs and discharge points. Based on this, we design a flue system that safely routes exhaust gases away from the building, taking into account height, weather exposure and airflow.
Supply and Installation of Flue Components
We install high-quality, corrosion-resistant flue materials suitable for diesel, gas or dual-fuel generators. This includes vertical or horizontal discharge systems, weather cowls, silencers and all necessary fixings for structural stability.
Custom Fabrication and Routing
Where off-the-shelf components don’t fit the site layout, we provide custom ductwork and routing solutions. This ensures the flue system adapts to tight spaces, unusual layouts or rooftop terminations without compromising airflow or safety.
Thermal and Structural Protection
To ensure safe operation, we apply insulation and protective barriers where needed. This prevents heat transfer to nearby structures, reduces fire risk and helps meet local authority fire and building safety codes.
Testing and Compliance Checks
After installation, we test the system to ensure correct flow rates and safe emission discharge. All work is carried out in line with manufacturer guidelines, DEFRA recommendations and relevant building and environmental standards.
Integration with Generator Installation Projects
For turnkey generator installations, we handle the flue system as part of the wider scope. This ensures a smooth process, with no missed steps or coordination issues between services.
Delivering results for businesses across the country
99.8%
First-time fix rate
150+
Businesses kept online
Protect your site with a flue system that’s built for safety and performance
Contact HG Projects today to discuss your generator flue requirements. We deliver reliable, regulation-ready installations that ensure safe operation, efficient exhaust management and long-term peace of mind.
