Indicative AOV Cost Categories

What Is Included in an AOV System Quotation?

A professional quotation should clearly explain the equipment and work being provided.

What Factors Affect AOV Installation Costs?

1. Number of Smoke-Control Zones

A single-zone system may require one panel and one smoke vent. In contrast, a multi-storey apartment building may require separate controls and dampers for each floor.

As the number of zones increases, the project may need:

• Additional panel capacity
• More detectors and interfaces
• Additional smoke dampers
• More extensive cabling
• Detailed cause-and-effect programming
• Longer commissioning and testing

2. Type and Size of Smoke Vent

A small automatic window may cost less than a large certified roof ventilator. Bespoke dimensions, glazing, finishes and weather ratings can also affect the price.

3. Natural or Mechanical Ventilation

Natural systems normally use windows, roof vents or smoke shafts. Meanwhile, mechanical systems use powered extract fans, dampers, ductwork and control equipment.

Mechanical systems can cost more because they usually involve additional equipment, electrical power, specialist commissioning and airflow testing.

4. Actuator Type and Required Force

Chain actuators may suit some windows, while heavier roof vents or dampers may require spindle, rack or linear actuators.

The actuator must be selected according to:

• Vent size and weight
• Opening distance
• Required force
• Wind loading
• Operating voltage
• Environmental exposure
• Required certification

5. Control-Panel Capacity

A small panel controlling one zone may cost less than a networked multi-zone panel. However, panel selection should be based on the total actuator load and required functions rather than price alone.

6. Fire Alarm Integration

The AOV may need separate signals for individual floors, stairways or smoke-control zones. This can require addressable input/output modules, monitored cabling and additional programming.

7. Access Requirements

Access can significantly affect labour costs. Roof vents, high-level windows and smoke-shaft equipment may require:

• Mobile access towers
• Powered access equipment
• Scaffolding
• Roof permits
• Fall-protection arrangements
• Traffic or pedestrian management

8. Existing Wiring

Reusing suitable wiring may reduce disruption. However, damaged, incorrectly sized or unsuitable cables may need replacement.

9. Building Alterations

New openings, structural supports, roof kerbs, builders’ work, decoration and weatherproofing can add to the project cost.

10. Documentation and Commissioning

A low quotation may exclude full cause-and-effect testing, documentation or coordinated commissioning with the fire alarm contractor. These activities are essential for demonstrating that the complete system operates correctly.

How Much Does an AOV Control Panel Cost?

The price of an AOV control panel depends on its output capacity, number of zones, battery requirements, networking functions and supported inputs.

Public UK listings currently show some smoke-ventilation control units starting at approximately £647 to £784. However, larger multi-zone or high-output panels can cost more.

In addition to the panel, the project may require:

• Standby batteries
• A dedicated mains supply
• Fire-resistant cabling
• Manual smoke-control switches
• Smoke detectors
• Fire alarm interface modules
• Weather sensors
• Installation and programming
• Commissioning and certification

Read our guide:

What Is an AOV Control Panel and How Does It Work?

How Much Does an AOV Actuator Cost?

Actuator prices vary according to type, force, stroke length, certification and environmental rating.

A quotation should include more than the actuator itself. Engineers may also need to provide:

• Mounting brackets
• Suitable cabling
• Control-panel compatibility checks
• Power calculations
• Mechanical adjustment
• Vent testing
• Cause-and-effect testing
• Making good after installation

Installing an undersized or incompatible actuator to reduce cost can result in partial opening, overload faults or unreliable operation.

How Much Does AOV Servicing Cost?

Servicing costs depend on the size and complexity of the system. A small single-zone system can usually be tested more quickly than a high-rise smoke shaft containing many dampers and interfaces.

One UK provider publicly advertises smoke-ventilation maintenance from £385. However, nationwide call-out requirements, access equipment, system size and the number of visits can alter the final price.

A service quotation may consider:

• Number of control panels
• Number of vents and actuators
• Number of smoke-shaft dampers
• Extract fans and replacement-air openings
• Fire alarm interface testing
• Battery testing
• Roof or high-level access
• Required maintenance frequency
• Travel and site restrictions
• Reporting requirements

What Should an AOV Service Include?

A quotation based only on checking panel lights may be cheaper, but it does not prove that the complete smoke-control system operates correctly.

How Much Do AOV Repairs Cost?

Repair costs depend on the fault. Replacing batteries or a damaged switch is usually less expensive than replacing a roof ventilator, fan or obsolete multi-zone control panel.

Is It Cheaper to Repair or Replace an AOV System?

Repair may be suitable where the system is supported, compatible parts remain available and the wider installation is in good condition.

Replacement may offer better long-term value when:

• The panel suffers repeated faults.
• Replacement parts are obsolete.
• Several actuators have failed.
• The system does not match the current fire strategy.
• The wiring is damaged or unsuitable.
• The cause-and-effect operation is incorrect.
• The existing panel lacks sufficient capacity.
• Repair costs are becoming excessive.

A condition survey can compare immediate repairs with a planned replacement or upgrade.

Can an Existing Window Be Converted into an AOV?

In some cases, an existing window may be fitted with a suitable actuator and controls. However, not every window is suitable for smoke-control use.

The assessment should consider:

• The required aerodynamic or geometric free area
• The window size and opening angle
• Frame and hinge condition
• Actuator force and mounting position
• Weather exposure
• Security and fall risks
• Certification requirements
• The approved fire strategy

Why Do AOV Quotations Vary So Much?

Two quotations may appear to cover the same project but include very different levels of work.

One quotation may include:

• System design
• Certified equipment
• Fire-resistant cabling
• Battery calculations
• Access equipment
• Fire alarm integration
• Complete cause-and-effect testing
• Commissioning documentation
• Making good
• Warranty and aftercare

Another may include only equipment supply and basic installation. Therefore, quotations should be compared line by line rather than by the total price alone.

Questions to Ask Before Accepting an AOV Quotation

How Can Building Owners Control AOV Costs?

Choosing the cheapest equipment is not always the best way to reduce long-term cost. Instead, building owners can improve value by planning work carefully.

• Maintain existing equipment before faults become severe.
• Keep vents and air inlets unobstructed.
• Retain commissioning documents and drawings.
• Provide accurate asset information to contractors.
• Coordinate AOV and fire alarm servicing where practical.
• Combine work across several buildings where appropriate.
• Plan obsolete-panel replacements before complete failure.
• Use compatible, supported components.
• Arrange access equipment efficiently.
• Correct water ingress and building defects promptly.

Does Insurance Cover AOV Repairs?

Insurance may cover certain sudden or accidental events, depending on the policy. However, ordinary wear, poor maintenance, corrosion or obsolete equipment may not be covered.

Building owners should check their policy and retain:

• Maintenance records
• Photographs of damage
• Engineer reports
• Fault history
• Repair quotations
• Commissioning certificates

The insurer should be contacted before major work begins where a claim may be made.

What Standards Apply to AOV Systems?

Relevant standards and guidance may include:

• BS EN 12101-2 – natural smoke and heat exhaust ventilators.
• BS EN 12101-3 – powered smoke and heat-control ventilators.
• BS EN 12101-8 – smoke-control dampers.
• BS EN 12101-10 – power supplies for smoke and heat-control systems.
• BS 7346-8 – recommendations for planning, design, installation, commissioning and maintenance.
• Approved Document B – fire-safety guidance supporting the Building Regulations in England.
• The approved building fire strategy.
• The equipment manufacturer’s instructions.

View information about the

BS EN 12101 smoke and heat-control series
.

Government fire-safety guidance is available through the

Approved Document B publication page
.

Who Is Responsible for Paying for AOV Work?

Responsibility commonly rests with the building owner, landlord, employer, housing provider, management company or responsible person.

In leasehold buildings, the cost may sometimes be recovered through service charges, depending on the lease and applicable legal requirements. Building owners and managing agents should obtain appropriate legal or property-management advice before allocating costs.

Article 17 of the Regulatory Reform (Fire Safety) Order 2005 requires necessary fire-safety facilities, equipment and devices to be suitably maintained and kept in efficient working order.

Read

Article 17 of the Fire Safety Order
.

Frequently Asked Questions

Professional AOV Quotations from AK Fire Safety

AK Fire Safety provides professional surveys and quotations for natural and mechanical smoke-control systems.

Our services include:

• AOV surveys and condition reports
• New AOV installation quotations
• Control-panel replacement quotations
• Actuator replacement and upgrades
• Smoke-shaft damper testing and repair
• Mechanical smoke-extract assessments
• Fire alarm interface testing
• Cause-and-effect testing
• Battery testing and replacement
• Fault diagnosis
• System recommissioning
• Planned preventative maintenance
• Multi-site maintenance contracts
• Nationwide coverage

Conclusion

The cost of an AOV system depends on the number of vents, control zones, equipment type, building access and installation requirements.

Public equipment prices can provide an initial guide. However, they do not represent the complete installed project cost. Design, cabling, access, electrical supplies, fire alarm interfaces, builders’ work and commissioning must also be considered.

Therefore, the best way to obtain an accurate price is to arrange a professional survey. The contractor can then inspect the existing system, review available documentation and prepare a detailed quotation.

Most importantly, quotations should be compared according to scope, equipment quality, testing and documentation—not price alone.