Smoke Vents / AOV built for daily commercial use.
Smoke ventilation systems are critical for life safety in commercial buildings. We install, repair and maintain smoke vents, AOV systems and associated controls, helping building owners and FM teams maintain fire safety compliance across London, Kent, Essex and Surrey.
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Clients We've Worked With
Trusted by leading brands across retail, corporate, education and public sectors
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What our clients say
"Reliable, professional, and always available when we need them. Their planned maintenance keeps our stores running smoothly across multiple sites."
James Thompson
Facilities Manager • Multi-site Retail
"Highly recommend NZR. Complex shopfront requirements delivered exactly as needed. Great communication throughout."
George Meco
Business Owner • Retail
"Zach's team handled a difficult curtain walling repair on a live office building with zero disruption to tenants. Spot on."
Sarah Williams
Property Manager • London
"Called them out for an emergency board-up after a smash — on site in under two hours, glazing replaced the next morning."
Mark Davies
Site Manager • Main Contractor
Commercial glazing services
Complete glazing solutions for businesses, FM companies, schools and public sector organisations across London and the South East.
Smoke vent & AOV opening enquiry
Replacement AOV windows, actuators and smoke vent glazing — coordinated with your fire/AOV contractor.
Smoke Vents / AOV FAQs
Do you repair and maintain smoke vents and AOV systems?
Yes, we provide comprehensive repair and maintenance services for smoke ventilation systems and Automatic Opening Vents (AOVs). This includes actuator repairs, control panel diagnostics, glazing replacement and full system servicing.
What checks and inspections are included in planned maintenance?
Our maintenance visits include: functional testing of all vents, actuator condition checks, control panel diagnostics, battery condition, glazing inspection, seal and gasket checks, drainage clearance, and full documentation for compliance records.
Can you replace glazing and panels in smoke vents and AOVs?
Yes, we replace damaged or failed glazing, spandrel panels and louvre blades in smoke ventilation systems. We match existing specifications and ensure replacement components meet fire safety requirements.
Do you coordinate with electrical contractors for controls and wiring?
Yes, we work with electrical contractors to install, repair and upgrade AOV control panels, wiring, sensors and fire alarm integration. We can coordinate this work or work alongside your appointed electrician.
Do you provide compliance documentation and testing reports?
Yes, we provide full documentation including test certificates, inspection reports and maintenance records. These are essential for your fire safety risk assessment and building compliance files.
How often should smoke vents and AOVs be tested?
Weekly functional testing is recommended for life safety systems, with comprehensive servicing at least annually. We can provide testing contracts to ensure your systems are maintained to required standards.
Can you upgrade older AOV systems to current standards?
Yes, we upgrade older systems including replacement of obsolete actuators, control panels and sensors. We assess your existing system and recommend cost-effective upgrade paths to meet current compliance requirements.
What types of smoke ventilation systems do you work on?
We work on all types including roof-mounted smoke vents, facade AOVs, smoke shaft systems, stairwell ventilation and car park ventilation systems. We're familiar with systems from major manufacturers including Colt, SE Controls and Kingspan.
Do you provide emergency repairs for failed smoke vents?
Yes, failed smoke vents are a fire safety issue requiring urgent attention. We provide priority response for AOV failures, aiming to attend within 2-4 hours in our core coverage area to diagnose and resolve issues.
Can you install new smoke ventilation systems?
Yes, we install new smoke vent and AOV systems for commercial buildings. We work with fire engineers and building control to design and install systems that meet Building Regulations Approved Document B and BS EN 12101.
What causes AOV actuator failures?
Common causes include age and wear, water ingress, power surge damage, overheating and mechanical seizure. Our engineers diagnose the specific cause and recommend repair or replacement based on cost-effectiveness.
Do your engineers hold relevant qualifications for smoke vent work?
Yes, our engineers are trained on smoke ventilation systems and familiar with fire safety requirements. We work to manufacturer specifications and industry best practice, providing documented evidence of competence.
Can you connect AOV systems to building management systems?
Yes, we can integrate AOV systems with BMS for centralised monitoring and control. This provides alerts for system faults and supports your overall building safety management.
What happens if a smoke vent fails during a fire test?
We attend promptly to diagnose and repair the issue. Common problems include actuator failure, power supply issues, control panel faults or mechanical obstructions. We provide documented evidence of repair for your compliance records.
Do you work on smoke ventilation in car parks?
Yes, we service and repair smoke ventilation systems in commercial car parks, including jet fan systems, natural smoke vents and associated controls. We understand the specific requirements for car park ventilation.
What areas do you cover for smoke vent services?
We cover London and the South East including Kent, Essex, Surrey and Sussex. Our engineers service smoke ventilation systems across Greater London, commercial developments and multi-storey buildings throughout the region.