Smoke and heat exhaust system: define the system, installation and costs
Smoke and heat exhaust needs a coordinated combination of extraction, incoming air and control. A roof window or fan alone does not describe the commission. The required solution is established for the building and its protection concept.
Define the project
A new system starts with design and technical coordination. Replacement and extension also require review of existing equipment. State whether whole areas, individual openings or controls are being changed.
A design enquiry is useful when the required function remains unresolved. Servicing and fault repair of existing equipment belong to a different scope.
Describe rooms and geometry
Stairwells, halls, atriums and basements present different conditions. Identify affected areas, use and known dimensions. Floor area helps for a hall; connections between storeys also matter for a stairwell.
Existing drawings and protection concepts can help the assessment. You do not need to calculate air-change rates or free opening areas yourself. Unknown technical details remain a design task.
Have the arrangement assessed
This overview supports discussion. It does not replace technical selection for the particular project.
| Approach | What needs assessment |
|---|---|
| Natural smoke exhaust | Suitable openings and replacement air under the building conditions. |
| Mechanical smoke exhaust | Fans, air paths, ducts and coordinated supply. |
| Pressure protection | A separate concept for limiting smoke entry into protected areas. |
Include incoming air and activation
Extracted air needs suitable replacement air paths. The location and function of openings, doors and gates therefore need planning together with extraction. Ordinary comfort ventilation is not automatically suitable for fire protection.
Controls, automatic activation and interfaces with other systems must match the concept. Power supply and behaviour during a power interruption also belong in the agreed technical scope.
Compare the complete scope
A low actuator price does not describe installation, electrical work, facade connections or checks. Compare the same areas and deliverables.
| Element | What the quote should state |
|---|---|
| Design | Survey, concept, necessary evidence and interface definition. |
| Supply and installation | Openings, actuators or fans with suitable fixing and building connections. |
| Control and electrical work | Wiring, operation, supply and integration with existing systems. |
| Checks and handover | Functional checks, updated records and instruction. |
Organise installation in clear stages
Responsibility for roof or facade work, electrical installation and system function should be established before work begins. Required coordination and acceptance processes are project-specific.
- Describe existing conditions. Record areas, use, equipment and documents.
- Coordinate the solution. Have air paths, activation, supply and interfaces designed.
- Organise installation. Agree access, building connections and work around continuing operation.
- Hand over the function. Record agreed checks, documentation and responsibilities.
Consider existing equipment and later use
New components may need different connections or controls. Compatibility must be assessed for the complete system. Changes to windows, doors or partitions may affect the intended air paths.
Handover includes understandable operating information and arrangements for later checks. Their scope and timing depend on the system, applicable requirements and manufacturer records; no universal service interval suits every installation.
Prepare an enquiry
A concrete overview is enough to start. Detailed design and sensitive building records can be shared later through an agreed method.
- Project. State design, installation, replacement or extension.
- Areas. Describe sites, use and affected rooms.
- Equipment. Identify existing openings, controls and known interfaces.
- Organisation. Clarify installation access, operation and timing.
Frequently asked questions
Is smoke exhaust the same as ordinary ventilation?
No. A fire-protection function requires a suitable coordinated arrangement. Comfort ventilation does not automatically meet those requirements.
Do I need to choose natural or mechanical extraction?
No. Describe the building and proposed work. The specialist establishes the approach and necessary evidence.
Why does incoming air matter?
Extraction needs suitable replacement air paths. Openings and air routes must be planned together to enable the intended function.
Can just the controls be replaced?
That can be a commission. New controls, actuators and interfaces need assessment within the complete existing system.
Which cost positions matter?
Design, equipment, installation, building connections, electrical work and handover. Compare the same service boundaries rather than isolated component prices.
Do all systems have the same check intervals?
No. System type, project requirements and manufacturer documentation influence the scope. Clarify responsibilities and agreed dates at handover.
