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October 2026
Top 5 passive fire protection companies
Of the 425 passive fire protection companies listed in the OpenFire directory in October 2026, these profiles were viewed most by people and AI assistants.
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#1
Crown Fire Systems
Professional fire door & fire stopping surveys delivered in accordance with UK Building Regulations and third-party standards. BlueSky Certified Fire Door & Firestopping Installer.
Contractor 6–20 people Est. 2024 1 officeCompartment walls & cavity barriers Fire & smoke dampers Fire door inspection & survey +4 moreRainham View company -
#2
A400 - Projetistas e Consultores (Fire & Safety Department)
Green By Default
Consultancy 100+ people Est. 1995 2 officesAlarm monitoring Car park ventilation CFD modelling +29 morePorto, Porto · HQ View company -
#3
Nacional Fire
Fire projects, AVCB licensing and installation across Brazil.
Supplier 1–5 people Est. 2024 1 officeDetection & suppression testing Alarm monitoring Building safety disputes +45 moreSão Paulo, São Paulo View company -
#4
Treliving real estate
Building Safety
Est. 2022 1 officeBuilding safety disputes Compartmentation Compartment walls & cavity barriers +7 moreBristol View company -
Joint #5
APAFS Passive Systems
Belfast passive fire protection specialist working across the UK and Ireland.
Contractor Est. 2018 1 officeCompartment walls & cavity barriers Firestopping PFP survey & inspection +1 moreBelfast, Northern Ireland View company -
Joint #5
TNTerry Nicolls SBA Facades Edinburgh
Facade and Fire Remediation Specialist
Est. 2026 1 officeCompartmentation Compartment walls & cavity barriers Façade fire engineering +5 moreEdinburgh View company
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Companies are ranked by how often their OpenFire directory profile was viewed during the calendar month, by people and by AI assistants. Search-engine crawlers, other automated traffic and link previews are not counted. Companies with equal views share a rank.
A company with offices in several countries, or working across several categories, is ranked in each of them on the same monthly total. A ranking is only published where enough companies are listed and viewed for it to be meaningful.
A ranking reflects interest in a company's listing. It is not an endorsement, and it is not a check of a company's competence, certification or accreditation.