Project Overview
Semper Services delivered an emergency response and full remediation of non-compliant boiler flue systems within a commercial office building in London's West End. Following an urgent call-out, the existing system was identified as Immediately Dangerous (ID) and isolated. A full technical assessment was undertaken to design and implement a compliant replacement solution, ensuring safe reinstatement of critical building services during winter conditions.
Scope of Works
Emergency attendance & full safety assessment
Isolation of Immediately Dangerous (ID) systems
Removal of non-compliant flue installations
Installation of new compliant flue systems
Extension of flues above roof parapet level
Strength testing & smoke testing of new installations
Recommissioning of heating & hot water systems
Solution / Delivery
Executed under emergency conditions with rapid mobilisation:
Senior engineering team deployed to accelerate delivery
Sequenced works enabling efficient removal & installation
Full verification of all systems prior to reinstatement
Controlled delivery approach to restore services rapidly
Outcome
The project resulted in the complete replacement of unsafe flue systems with fully compliant installations, restoring heating and hot water services safely and efficiently. Through rapid response and controlled execution, Semper Services minimised downtime and ensured the building was returned to full operational status with verified compliance.
Project Challenges
Emergency scenario with complete loss of heating/hot water
Working within occupied commercial office environment
Delivering full replacement in compressed timeframe
Services Provided
Emergency Response
Gas Safety Compliance
Flue Replacement
Boiler Recommissioning
Testing & Certification




