The Merchant – Hull
Complete Fire & Security System Installation | 2023-2024
Project Overview
In early 2023, Cobra Fire & Security was appointed by DBG Developments to deliver the complete fire and security system package for The Merchant – a high-spec residential apartment building located in the centre of Hull.
We delivered a fully integrated, multi-system solution, covering:
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Fire Alarm System (Advanced panels with Apollo devices)
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Access Control (Paxton)
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AOV (Automatic Opening Ventilation) System by Ventlux
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Intercom System by Videx
This project showcases our ability to manage complex, multi-discipline installations from design through to commissioning — all delivered in-house.

Challenges & Objectives
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Deliver fully compliant life safety and access systems to meet BS 5839, BS 9991, and Building Control approval.
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Coordinate fire, access and intercom works around internal fit-out across multiple floors.
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Ensure seamless integration while maintaining aesthetics and resident convenience.
Our Solution
Fire Alarm System
The building was designed around a stay-put fire strategy, and the fire alarm system was engineered to support this approach. We installed a fully addressable Grade A, Category L5 fire alarm system across the communal areas, with Category L2 coverage in higher-risk locations such as plant rooms and service risers.
Key features included:
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Advanced Electronics control panel with Apollo detectors
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Category L5 detection in corridors, lobbies, and shared areas
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Category L2 coverage in plant rooms, riser cupboards, and service spaces
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Integrated with the Ventlux AOV system for automatic smoke ventilation upon fire detection
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24/7 monitoring via a third-party alarm receiving centre (ARC), with direct fire brigade response
This configuration ensured full compliance with BS 5839‑1, supported the stay-put evacuation model, and provided a robust early warning and response mechanism without causing unnecessary alarm to residents.
AOV System
A Ventlux AOV (Automatic Opening Ventilation) system was fitted for the communal stairwells and corridors. This system automatically activates on fire detection, clearing smoke and ensuring compliance with BS 9991.
Access Control
Proximity fob-based access control was installed at building entry points, enabling secure, resident-only access while maintaining fire escape compliance.
Intercom System
A Videx video intercom system allows residents to see and speak to visitors before granting access. Each apartment was equipped with a handset for door release.
Results & Benefits
About the Client
DBG Developments is part of the DBG Group, a well-established construction and development company based in Doncaster. Known for delivering high-quality residential and commercial projects across Yorkshire and the Midlands, their focus on client satisfaction, attention to detail, and team-driven values sets them apart in the industry.
DBG’s continued success is built on long-term client relationships, repeat business, and a commitment to excellence at every stage of construction. Their team approach extends beyond internal staff — they treat trusted subcontractors as part of the wider DBG family, working in close partnership to ensure shared goals are delivered on time and to the highest standards.
We’re proud to have partnered with DBG Developments on this project, contributing to their growing portfolio of successful, modern residential schemes.
Planning a Residential Development?
At Cobra Fire & Security, we specialise in delivering fully integrated life safety and security systems for residential and commercial developments across Hull, East Yorkshire, and beyond.
If you’re working on a new-build apartment scheme, an HMO conversion, or a multi-occupancy commercial building, we can help with:
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Fire Alarm System Design & Installation (BS 5839-1 & -6 compliant)
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Automatic Opening Ventilation (AOV) Systems
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Access Control for Residents & Staff
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24/7 Monitoring & Commissioning with Certification
Our experienced team can support you from pre-construction design stages through to handover, testing, and Building Control sign-off.
Based locally and trusted by developers like DBG Group, we’re ready to support your next project.
Get in touch today to arrange a site visit or request a no-obligation quotation.